2011年第42卷第2期共收錄47篇
1. Accession number: 20111313882849
Title: Strain and strain rate of serrated chip generated by high speed cutting of superalloys
Authors: Yang, Qibiao1 ; Liu, Zhanqiang1 ; Cao, Chengming1 ; Du, Jin1
Author affiliation: 1 School of Mechanical Engineering, Shandong University, Ji'nan 250061, China
Corresponding author: Yang, Q. (qibiaoy@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 225-228
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: An analytical model of vertex's shear strain and shear strain rate was developed based on the process of serrated chip formation with geometry shape of serrated chip as a trapezoid. The chip deformations under different cutting speeds for GH4169 were discussed with the proposed model. The results showed that with the cutting speed increasing, the degree of chip deformation increased. The maximums of strain and strain rate were respectively 4.91 and 4.59 × 106s-1 with applied cutting speed range in 200-1000 m/min.
Number of references: 11
Main heading: Strain rate
Controlled terms: Deformation - Mathematical models - Shear strain - Speed - Superalloys
Uncontrolled terms: Analytical model - Chip deformation - Cutting speed - High speed cutting - Serrated chip - Serrated chip formation
Classification code: 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 531 Metallurgy and Metallography - 921 Mathematics - 931.1 Mechanics
Database: Compendex
2. Accession number: 20111313882239
Title: Optimal bandwidths of sensitive bands for portable nitrogen monitoring instrument in wheat
Authors: Yao, Xia1 ; Liu, Xiaojun1 ; Wang, Wei1 ; Ni, Jun1 ; Cao, Weixing1 ; Zhu, Yan1
Author affiliation: 1 Jiangsu Key Laboratory for Information Agriculture, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author: Zhu, Y. (yanzhu@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 162-167
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The responses of canopy spectral reflectance, optimum spectral indices and monitoring models for leaf nitrogen accumulation (LNA) in wheat to the changes in bandwidths were analyzed on the basis of the sensitive bands of 720 nm, 860 nm and 990 nm. The results showed that with increasing bandwidth, the reflectance increased sharply at 720 nm and slowly at 990 nm, but decreased at 860 nm. The values of NDSI(R860, R720) and RSI(R990, R720) decreased gradually, along with reduced accuracy of calibration and validation for monitoring models. The monitoring models based on NDSI(R860, R720) displayed stable performance with the bandwidths of the key bands less than 96 nm and 28 nm, respectively, while those of RSI(R990, R720) less than 3 nm and 13 nm, respectively. These results helped to provide theoretical basis and technical approach for manufacturing economical portable nitrogen monitoring instrument.
Number of references: 16
Main heading: Bandwidth
Controlled terms: Monitoring - Nitrogen - Reflection
Uncontrolled terms: Canopy spectral reflectance - Leaf nitrogen - Leaf nitrogen accumulation - Monitoring instruments - Monitoring models - Non-destructive monitoring - Sensitive bands - Spectral indices - Theoretical basis - Winter wheat
Classification code: 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 804 Chemical Products Generally - 716.1 Information Theory and Signal Processing - 711 Electromagnetic Waves
Database: Compendex
3. Accession number: 20111313882240
Title: Design and experiment on intelligent variable concentrate feeding system for individual dairy cow
Authors: Yan, Shitao1 ; Yan, Yinfa1 ; Song, Zhanhua1 ; Wang, Ranran1 ; Li, Fade1
Author affiliation: 1 Mechanical and Electronic Engineering College, Shandong Agricultural University, Taian 271018, China
Corresponding author: Li, F. (li_fade@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 168-172
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A variable concentrate feeding system for individual dairy cow was developed. The system identified the dairy cow with the RFID technology. According to the differences of the basic diet intake and the individual milk yield, the system could automatically and quantificationally discharge and mingle four kinds of the different concentrates feeds. The experimental results indicated that the response time was 1.47s, the time for discharging compensated feeds was 15.15s, the time to open the railing of the entrance guard was 3.92s, the reading distance of the RFID reading system was 52.3 cm, the alarm level height was 21.5 cm, the identification accuracy of cow was 100%, and the four kinds of concentrates were mixed well, the measurement error was less than 5%, which could satisfy the demands of feeding. Moreover, the system can query and print feeding information online.
Number of references: 12
Main heading: Search engines
Controlled terms: Cryptography - Dairies - Feeding - Materials handling equipment - Radio frequency identification (RFID)
Uncontrolled terms: Alarm level - Dairy cow - Diet intake - Feeding system - Identification accuracy - Milk yield - Precision feeding - Response time - RFID - RFID Technology - Variable concentrate feed
Classification code: 402.1 Industrial and Agricultural Buildings - 691.1 Materials Handling Equipment - 691.2 Materials Handling Methods - 723 Computer Software, Data Handling and Applications - 731.1 Control Systems
Database: Compendex
4. Accession number: 20111313882222
Title: Optimal design and simulation on pricking hole mechanism of liquid fertilizer applicator
Authors: Xi, Xiaohuan1 ; Wang, Jinwu1 ; Lang, Chunling1 ; Zhang, Chengliang1
Author affiliation: 1 College of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author: Wang, J. (jinwuw@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 80-83
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to reduce throwing soil as fertilizing the field, mathematical model of pricking hole mechanism was built, computer aided analysis software was developed in VB language. Simulation results showed that the effort factors of fertilize related to spraying needle, rocker, angle of spraying needle and rocker, planet carrier and so on. One of the optimum parameters were that, the length of rocker was 197 mm, spraying needle was 180 mm, angle of spraying needle and rocker was 76°, the initial planet carrier of angle was 31° and the initial angle between the line of connection with planet wheel axle and spraying fertilizer needle's D and the line of the center connection of planet carrier was -70°. The optimal model was verified to get well effect on pricking hole mechanism.
Number of references: 11
Main heading: Fertilizers
Controlled terms: Computer aided analysis - Design - Geologic models - Liquids - Mathematical models - Needles - Optimal systems - Optimization - Wheels
Uncontrolled terms: Computer aided - Initial angle - Liquid fertilizer - Liquid fertilizers - Optimal design - Optimal model - Optimum parameters - Planet carriers - Prick hole mechanism - Simulation result
Classification code: 931.2 Physical Properties of Gases, Liquids and Solids - 921.5 Optimization Techniques - 921 Mathematics - 819.6 Textile Mills, Machinery and Equipment - 804 Chemical Products Generally - 723.5 Computer Applications - 601.2 Machine Components - 481.1 Geology - 408 Structural Design
Database: Compendex
5. Accession number: 20111313882238
Title: Positioning method of variable rate applicators in irregular field
Authors: Yu, Yingjie1 ; Zhang, Shuhui2 ; Qi, Jiangtao3 ; Xu, Yan3 ; Wang, Wei3
Author affiliation: 1 Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China
2 Nanjing Institute of Industry Technology, Nanjing 210046, China
3 Key Laboratory of Bionic Engineering, Jilin University, Changchun 130025, China
Corresponding author: Yu, Y. (yuyingjie58@sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 158-161
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The algorithm of automatic grid recognition for irregular fields was introduced based on the algorithm of automatic grid recognition for regular fields. The controller received pulse signals from the sensor and calculated the working distance of the variable rate applicator, thus the working grid could be identified by the algorithm of automatic grid recognition. The field experimental results showed that using this positioning algorithm, the applicator could be automatically recognized in different grid.
Number of references: 5
Main heading: Applicators
Controlled terms: Algorithms
Uncontrolled terms: Grid identification - Irregular field - Positioning - Positioning algorithms - Positioning methods - Pulse signal - Variable rate - Working distances
Classification code: 601 Mechanical Design - 723 Computer Software, Data Handling and Applications - 921 Mathematics
Database: Compendex
6. Accession number: 20111313882214
Title: Hydraulic system design and dynamic characteristic simulation of full hybrid transmission
Authors: Han, Bing1 ; Cai, Yixi1 ; Zhang, Tong1 ; Yu, Haisheng2
Author affiliation: 1 School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China
2 School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Corresponding author: Han, B. (hanbingpaper@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 43-47
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The hydraulic system of electronic-continuously variable transmission (e-CVT) of full hybrid electric vehicle was designed. Hydraulic scheme was confirmed based on the structure and driving modes of the hybrid system. Oil pump was driven by output shaft or electric motor in order to match the flow requirement of different driving situation. The structure dimension of hydraulic valves was designed by theoretical calculation. The dynamic model of hydraulic system was established by ITI-SimulationX to investigate the characteristics of oil flow and pressure. Simulation results indicated the hydraulic system could satisfy the design flow and pressure requirement.
Number of references: 8
Main heading: Hydraulic equipment
Controlled terms: Automobiles - Computer simulation - Electric vehicles - Hybrid systems - Hydraulics - Structural design - Systems analysis
Uncontrolled terms: Continuously variable transmission - Design flows - Driving mode - Driving situations - Dynamic characteristics - Dynamic simulation - Flow requirements - Hybrid electric vehicle - Hybrid transmissions - Hydraulic system - Hydraulic valves - Oil flow - Oil pump - Simulation result - Structure dimensions - Theoretical calculations
Classification code: 961 Systems Science - 921 Mathematics - 723.5 Computer Applications - 662.1 Automobiles - 632.2 Hydraulic Equipment and Machinery - 632.1 Hydraulics - 408.1 Structural Design, General
Database: Compendex
7. Accession number: 20111313882220
Title: Real-time monitoring system for accuracy of precision seeder
Authors: Song, Peng1 ; Zhang, Junxiong1 ; Li, Wei1 ; Zhang, Xiaochao2 ; Fang, Xianfa2
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Fang, X. (fangxf@caams.org.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 71-74 79
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A real-time precision monitoring system for precision seeder was developed, and a single-chip microcomputer was used to process the signal of seeds dropping obtained by a photoelectric sensor. The information of seeds quantity, missing rate and multiples rate was all recorded in this system. A linear laser and patched photosensitive diodes which were arranged tightly in line were used as the emitter and receiver to achieve a no blind spot monitoring, it is better to monitoring seeds with an effective diameter of about 2 mm or larger. A self-cleaning device was designed thereby guaranteed reliable operation of the monitoring system in severe environment. A pneumatic corn seeder and corn seeds "Nongda 86" were used in the experiment, meanwhile, a high-speed line camera was used to verify the accuracy of the system. Results indicated that the monitoring system had an accuracy of 98% in seeding quantity, an accuracy of 96% in missing detecting and a high reliability.
Number of references: 11
Main heading: Monitoring
Controlled terms: Cleaning - Photoelectricity - Seed - Sensors
Uncontrolled terms: Blind spots - Cleaning devices - Corn seeds - Effective diameter - High reliability - High speed lines - In-line - Linear lasers - Missing rate - Monitoring system - Photoelectric sensors - Photosensitive diodes - Precision monitoring - Precision seeder - Real time monitoring - Real-time monitoring systems - Reliable operation - Self-cleaning - Single chip microcomputers
Classification code: 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 821.4 Agricultural Products - 801 Chemistry - 741.1 Light/Optics - 802.3 Chemical Operations
Database: Compendex
8. Accession number: 20111313882250
Title: Optimization of cutting parameters based on Pareto genetic algorithm
Authors: Liu, Wei1 ; Wang, Taiyong1
Author affiliation: 1 Tianjin Key Laboratory of Advanced Manufacturing Technologies and Equipments, Tianjin University, Tianjin 300072, China
Corresponding author: Liu, W. (liuwei0616@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 220-224 234
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on the Pareto genetic algorithm, an algorithm was proposed for the cutting parameters selection and optimization to solve the decision-making problems of the cutting parameters in a computer aided process planning (CAPP) system. First, a multi-objective model was built by analysis of restraint with cutting speed and feed as optimization variables and cutting efficiency and the tool life as optimization objectives. Second, the selection operator was improved. In order to ensure the search direction, a non-inferior set was set up to save Pareto optimal solutions which were generated by competition during evolutionary processes. The crowing mechanism based on niche technology was established to keep population diversity. And then, genes were recombined by means of mixed crossover operator and step-size mutation operator and an optimal set which distributed uniformly along the Pareto front was obtained after a few times iteration. Experiments results showed that this algorithm was feasible and effective.
Number of references: 21
Main heading: Computer aided process planning
Controlled terms: Computer aided manufacturing - Decision making - Genes - Genetic algorithms - Mathematical operators - Multiobjective optimization - Parameter estimation - Pareto principle - Process control - Process engineering - Turning
Uncontrolled terms: Computer aided process planning systems - Crossover operator - Cutting efficiency - Cutting parameters - Cutting speed - Decision-making problem - Evolutionary process - Multiobjective models - Mutation operators - Niche technology - Optimal sets - Optimization variables - Pareto front - Pareto genetic algorithm - Pareto genetic algorithms - Pareto optimal solutions - Population diversity - Search direction - Selection operators - Tool life
Classification code: 921 Mathematics - 913.4.2 Computer Aided Manufacturing - 912.2 Management - 912 Industrial Engineering and Management - 921.5 Optimization Techniques - 911 Cost and Value Engineering; Industrial Economics - 731 Automatic Control Principles and Applications - 604.2 Machining Operations - 461.2 Biological Materials and Tissue Engineering - 731.1 Control Systems
Database: Compendex
9. Accession number: 20111313882225
Title: Experiment of combined-lifter device for sugarcane harvester
Authors: Xie, Fuxiang1 ; Ou, Yinggang1 ; Liu, Qingting1
Author affiliation: 1 Key Laboratory of Key Technology on Agricultural Machine and Equipment, South China Agricultural University, Guangzhou 510642, China
Corresponding author: Ou, Y. (ouying@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 94-98
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to lift severely lodging sugarcane in harvesting, the combined-lifter composed of spiral roller and chain-lifter was designed, which was experimented on the vehicle of soil. The orthogonal experiments were conducted to study the following factors: the state, rotational speed of spiral roller, distance between sugarcane and spiral roller center and advancing velocity. According to the best combination of orthogonal test, the single experiments were conducted to study the following factors: the angle between the cylinder axis and ground, the blade pitch of helical spiral roller and rotational speed of spiral roller. The double experiments were conducted with the rotational speed and advancing velocity. High-speed photography experiments were conducted to analyze the process of lifting. In the optimal parameters, the results showed that eligible rate of lifting was up to 90% by the combined-lifter.
Number of references: 10
Main heading: Experiments
Controlled terms: Cylinders (shapes) - Harvesters - High speed photography - Rollers (machine components)
Uncontrolled terms: Blade pitch - Combined-lifter device - Cylinder axis - Eligible rate of lifting - Optimal parameter - Orthogonal experiment - Orthogonal test - Rotational speed
Classification code: 408.2 Structural Members and Shapes - 601.2 Machine Components - 742.1 Photography - 821.1 Agricultural Machinery and Equipment - 901.3 Engineering Research
Database: Compendex
10. Accession number: 20111313882209
Title: Road feel design for vehicle steer-by-wire system
Authors: Zheng, Hongyu1 ; Zong, Changfu1 ; Wang, Xiang1
Author affiliation: 1 State Key Laboratory of Automobile Dynamic Simulation, Jilin University, Changchun 130025, China
Corresponding author: Zong, C. (cfzong@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 18-22
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: For steer-by-wire (SBW) system removes mechanical linkages between steering system and front wheels, driver is unable to sense road information, a dynamic model of SBW system was established to analyze the road feel theory of vehicle steer system. The road feel control method of SBW system was designed to produce the steering road feel almost the same as that obtained in a conventional electric power steering (EPS) system. Road feel was computed by rack force of steer system and assist characteristics of EPS system. For rack force was difficult to measure, an algorithm was proposed to estimate rack force by Kalman filter. The test results showed that drivers could effective get road feel information and SBW system could improve the vehicle maneuverability by the proposed road feel control method.
Number of references: 9
Main heading: Steering
Controlled terms: Automobile parts and equipment - Automobile steering equipment - Force measurement - Highway planning - Kalman filters - Maneuverability - Roads and streets - Vehicle wheels - Wire
Uncontrolled terms: Assist characteristic - Control methods - Electric power steering - EPS systems - Front wheels - Mechanical linkages - Road feel - Simulated method - Steer-By-Wire - Steer-by-wire systems - Steering systems - Test results
Classification code: 731.1 Control Systems - 671.1 Ship Design - 663.2 Heavy Duty Motor Vehicle Components - 943.2 Mechanical Variables Measurements - 601.2 Machine Components - 406.2 Roads and Streets - 406.1 Highway Systems - 535.2 Metal Forming
Database: Compendex
11. Accession number: 20111313882235
Title: Effect of saccharification technology parameters on saccharifying for extrusion rice used as beer adjunct
Authors: Zuo, Feng1 ; Shen, Dechao2 ; Qian, Lili1 ; Wu, Yan1
Author affiliation: 1 College of Food Science, Heilongjiang Bayi Agricultural University, Daqing 163319, China
2 College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255049, China
Corresponding author: Shen, D. (shendc@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 144-148
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: For reasonably determining the parameters of saccharification technology for extrusion cooked rice used as beer adjunct, influence regularity of the parameters of saccharification technology was studied through experiments. These parameters included saccharification time of 65°C, saccharification time of 71°C, the add content of thermostable α-amylase. The indexes included the recoverable ratio of wort extract, the iodine value of mash and the ratio of starch residues in adjunct. The research results indicated the recoverable ratio of wort extract for extruded rice was 76.25%, the iodine value of mash was 0.15, the ratio of starch residues in adjunct was 0.52%, when the saccharification time of 65°C was 60 min, the saccharification time of 71°C was 15 min, the add content of thermostable α-amylase was 2.1 mL. In addition, it was proved that the extruded rice could be used as beer adjunct with the chemical analysis of mash.
Number of references: 20
Main heading: Saccharification
Controlled terms: Amylases - Beer - Chemical analysis - Experiments - Extrusion - Hydrolases - Industrial chemicals - Iodine - Starch
Uncontrolled terms: Cooked rice - Iodine value - Research results - Rice - Technology parameters
Classification code: 535.2.2 Metal Forming Practice - 804 Chemical Products Generally - 804.1 Organic Compounds - 811.3 Cellulose, Lignin and Derivatives - 822.3 Food Products - 901.3 Engineering Research
Database: Compendex
12. Accession number: 20111313882224
Title: Optimal design and kinematic analysis for planting system of garlic planting machinery
Authors: He, Yueping1 ; Chen, Qingchun1 ; He, Ruiyin1 ; Yu, Haiming1
Author affiliation: 1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author: Chen, Q. (chenqc@njau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 88-93 119
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: To meet the agronomic requirements of maintaining the garlic clove upright with its root downward during the process of garlic planting, operating principles of rice transplanting mechanism was used as the optimal design basis of planting system of garlic planting machinery. Equations of cave width, space, depth were obtained through kinematic analysis. Mathematical optimization model was established with required cave width as objective function and restrained conditions not reported previously. Parameters affecting cave width were discussed, and optimized using Matlab. Optimization results indicated that the difference between desired and actual cave width was 0.02 mm. Planting system of garlic planting machinery was simulated and analyzed using ADAMS. The results showed that the system met the garlic planting requirements.
Number of references: 10
Main heading: Machine design
Controlled terms: Caves - Functions - Kinematics - Machinery - Optimal systems - Optimization
Uncontrolled terms: Garlic planting machinery - Kinematic Analysis - Mathematical optimization model - Objective functions - Operating principles - Optimal design - Planting systems
Classification code: 481.1 Geology - 601 Mechanical Design - 921 Mathematics - 921.5 Optimization Techniques - 931.1 Mechanics
Database: Compendex
13. Accession number: 20111313882251
Title: Replication of shark skin based on micro-electroforming
Authors: Han, Xin1 ; Zhang, Deyuan2
Author affiliation: 1 School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
2 School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
Corresponding author: Han, X. (hanxin@sdut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 229-234
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Direct replication of biological surface morphology using micro-electroforming method to form biomimetic surfaces with relatively vivid morphology is a new process extension from polymer forming to metal deposition forming of the bio-replicated forming technology. Taking shark skins as the replication templates, the conducting layer was deposited on the shark scales with the inclined magnetron sputtering process according to the structural characteristics of shark skins. Then the micro-electroforming process adopting the pulse-reverse currents was conducted. Finally the shark skin micro-electroforming template and the biomimetic shark skin were obtained. The preliminary analysis on replication precision indicated that the micro-electroforming method could be used to replicate the outward morphology of the shark skins with good precision, which validated the application of the bio-replicated forming technology in the direct replication of the complex and microscale biological surface morphology.
Number of references: 12
Main heading: Surface morphology
Controlled terms: Biomimetics - Electrochemistry - Electroforming - Electrometallurgy - Functional polymers - Morphology - Winding machines
Uncontrolled terms: Bio-replicated forming - Biological surfaces - Biomimetic surfaces - Conducting layers - Forming technology - Magnetron sputtering process - Metal deposition - Micro-electroforming - Micro-scales - New process - Polymer forming - Preliminary analysis - Reverse currents - Shark skin - Structural characteristics
Classification code: 691.1 Materials Handling Equipment - 801.2 Biochemistry - 801.4.1 Electrochemistry - 815.1 Polymeric Materials - 951 Materials Science
Database: Compendex
14. Accession number: 20111313882243
Title: Predictive control method for greenhouse measurement and control system based on switch devices optimization combination
Authors: Shen, Min1 ; Zhang, Rongbiao1 ; Sheng, Biqi1 ; Song, Yongxian1
Author affiliation: 1 School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Shen, M. (shenmin@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 186-189 161
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Considering the nonlinear dynamic response of the greenhouse measurement and control system based on switch devices combination control, a discrete predictive model was proposed. The model had simple structure and uncomplex computation. Within the time domain not less than the maximum distribution delay of the system, the devices combination was keeped invariably and optimized rollingly to carry out predictive control, so the predictive control complexity of the system was greatly simplified, the problem of long distribution delays of the system was relieved. The simulation analysis and root mean square of the temperature showed that the optimization combination predictive control method was effective for the greenhouse measurement and control system with long distribution delays.
Number of references: 10
Main heading: Model predictive control
Controlled terms: Control theory - Dynamic response - Greenhouses - Optimization - Predictive control systems - Time domain analysis
Uncontrolled terms: Delay compensation - Measurement and control - Nonlinear dynamic response - Optimization combination - Predictive control - Predictive control methods - Predictive models - Root Mean Square - Simple structures - Simulation analysis - System-based - Time domain
Classification code: 402.1 Industrial and Agricultural Buildings - 408.1 Structural Design, General - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 732 Control Devices - 921.5 Optimization Techniques
Database: Compendex
15. Accession number: 20111313882208
Title: Networks design and schedule strategy of CAN and FTTCAN in vehicle
Authors: Wang, Shuju1 ; Zhang, Tianxia1 ; Zhang, Guosheng1
Author affiliation: 1 School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China
Corresponding author: Wang, S. (wangshuju126@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 14-17 7
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Controller area network (CAN) can not deal with event-triggered traffic and time-triggered traffic simultaneously and efficiently in real time system. Considering the flexibility of design and schedule, flexible time triggered CAN (FTTCAN) was introduced to manage the power transmission system in vehicle and build up in-vehicle networks with CAN by linking with gateway. The method of allot messages in scheduling table (SchT) in synchronous phase was introduced. The analysis results of system such as real time performance and dependability verified the proposed scheme was feasible and showed perfect performance.
Number of references: 9
Main heading: Gateways (computer networks)
Controlled terms: Control system synthesis - Electric power transmission - Interactive computer systems - Real time systems - Vehicles
Uncontrolled terms: Analysis results - CAN bus - Controller area network - Event-triggered - Flexible time triggered CAN - Flexible time triggered cans - In-vehicle - In-vehicle networks - Power transmission systems - Real time performance - Schedule - Schedule strategy - Synchronous phase - Time triggered
Classification code: 723 Computer Software, Data Handling and Applications - 722.4 Digital Computers and Systems - 718 Telephone Systems and Related Technologies; Line Communications - 731.1 Control Systems - 717 Optical Communication - 706.1.1 Electric Power Transmission - 432 Highway Transportation - 716 Telecommunication; Radar, Radio and Television
Database: Compendex
16. Accession number: 20111313882228
Title: Load control of wind turbine based on model-free adaptive controller
Authors: Lu, Xiaoping1 ; Li, Wei1 ; Lin, Yonggang1
Author affiliation: 1 State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
Corresponding author: Lin, Y. (qgb@zju.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 109-114 129
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A linear model for individual pitch of wind turbine system was established, and the loads of blade roots were transferred into a mean value and variations on two orthogonal axis using Park's transformation. The model-free adaptive controllers (MFA) were designed to control the loads components of the two orthogonal axes. The wind turbine nonlinear model FAST built by NREL was used to verify the controller. Test results showed that individual pitch based on MFA could eliminate the imbalance loads effectively. Compared to collective pitch control, the for-aft torque was decreased by 62.5%, yaw torque was decreased by 60.1%, and the value of output power changed a little.
Number of references: 17
Main heading: Controllers
Controlled terms: Adaptive control systems - Flight dynamics - Linear transformations - Parks - Turbomachine blades - Wind power - Wind turbines
Uncontrolled terms: Adaptive controllers - Blade roots - Collective pitch - Individual pitch - Linear model - Load control - Mean values - Model free - Model-free adaptive controller - Non-linear model - Orthogonal axes - Orthogonal axis - Output power - Park's transformation - Test results - Wind turbine systems
Classification code: 931.1 Mechanics - 921.3 Mathematical Transformations - 732.1 Control Equipment - 731.1 Control Systems - 618 Compressors and Pumps - 615.8 Wind Power (Before 1993, use code 611 ) - 403.2 Regional Planning and Development
Database: Compendex
17. Accession number: 20111313882244
Title: Optimization method of flexible job-shop scheduling based on multiobjective particle swarm optimization algorithm
Authors: Wang, Yun1 ; Feng, Yixiong1 ; Tan, Jianrong1 ; Li, Zhongkai1
Author affiliation: 1 State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
Corresponding author: Wang, Y. (iwangbruce@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 190-196
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: To solve flexible job-shop multiobjective scheduling problem, the optimization model was set up. Considering of the makespan, manufacturing cost and earliness/tardiness penalties, a crowding distance sorting based on multiobjective particle swarm optimization algorithm was proposed. With the elitism strategy, dominant individuals were preserved in evolution process. The shrink of the external population and update of the global best were achieved by the individuals' crowding distance sorting in descending order. A small ratio mutation was introduced to enhance the diversity of solutions and the global searching capacity of the algorithm. Finally, the feasibility and validity of the method was proved by the simulation results of a flexible job-shop multiobjective scheduling in a workshop.
Number of references: 20
Main heading: Multiobjective optimization
Controlled terms: Particle swarm optimization (PSO) - Scheduling algorithms - Screening
Uncontrolled terms: Crowding distance - Earliness/tardiness penalties - Elitism strategy - Evolution process - Flexible job-shop scheduling - Global searching - Job-shop - Makespan - Manufacturing cost - Multi objective particle swarm optimization - Multi-objective scheduling - Multi-objective scheduling problems - Multiobjective particle swarm optimization algorithm - Optimization method - Optimization models - Simulation result
Classification code: 524 Solid Fuels - 723 Computer Software, Data Handling and Applications - 921 Mathematics - 921.5 Optimization Techniques
Database: Compendex
18. Accession number: 20111313882245
Title: Reconstruction and geometrical property of top scroll profile based on frenet frame
Authors: Liu, Tao1 ; Wu, Zaixin2 ; Rui, Zhiyuan1
Author affiliation: 1 Key Laboratory of Digital Manufacturing Technology and Application, Lanzhou University of Technology, Lanzhou 730050, China
2 School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Corresponding author: Liu, T. (liutao1971@lut.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 197-202
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: According to the situation that there is no general model to express both main profile and modified top profile, a general integration equation expressed in tangential angle series was established for scroll profile. The start part of profile was reconstructed with zeroth-order curve and first-order curve, respectively. The influence of parameters of top profile on thickness of scroll tooth was analyzed quantitatively. Furthermore, the geometrical models of area of compression chamber were set up based on curvature radius function of base line. The effect of curvature radius parameters on area property was explored. This study showed that first-order curve construction of top scroll could achieve higher performance by improving volume ratio while maintain reasonable tooth strength. With continuity equation of scroll baseline in form of radius of curvature, a fully-meshed profile and complete tooth profile could be obtained in the stage of machine design, so that there was no need to modify top scroll in later stages. The results could be applied in the scroll profile design.
Number of references: 12
Main heading: Machine design
Controlled terms: Geometry
Uncontrolled terms: Frenet frame - Geometrical property - Radius of curvature - Reconstruction - Scroll profile
Classification code: 601 Mechanical Design - 921 Mathematics
Database: Compendex
19. Accession number: 20111313882213
Title: Calculation of dynamic axle-load of 4-axle driven vehicle crossing obstacle
Authors: Wei, Daogao1 ; Ou, Yinggang2 ; Yang, Dantong2 ; Liu, Qingting2
Author affiliation: 1 School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China
2 Key Laboratory of Key Technology on Agricultural Machine and Equipment, South China Agricultural University, Guangzhou 510642, China
Corresponding author: Wei, D. (weidaogao@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 39-42 53
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A 4-axle driven hill-terrain vehicle was made in China. To improve the vehicle fatigue strength and reliability, the dynamics models of 4 axle-load were founded when it crossing obstacle. According to the dynamics models, the axle-load distributions of the vehicle crossing obstacle were calculated when off-road adhesion coefficient φ is 0.1-1.0. The results showed its axle-load distributions had more different among 4-axle when the vehicle crossing obstacle, the distribution law was analyzed. The design of 4-axle different strength and improving the 4-axle strength was put forward. The paper provided a mathematic model for reliability design and optimizing distribution of torque when the hill-ground crossing obstacle.
Number of references: 7
Main heading: Axles
Controlled terms: Automobile manufacture - Off road vehicles - Reliability - Roads and streets - Vehicles - Wheels
Uncontrolled terms: Adhesion coefficient - Axle loads - Crossing obstacle - Distribution law - Dynamics models - Fatigue strength - Made in China - Mathematic model - Reliability design - Terrain vehicles
Classification code: 663.2 Heavy Duty Motor Vehicle Components - 663 Buses, Tractors and Trucks - 662 Automobiles and Smaller Vehicles - 601.2 Machine Components - 432 Highway Transportation - 421 Strength of Building Materials; Mechanical Properties - 406.2 Roads and Streets
Database: Compendex
20. Accession number: 20111313882246
Title: Fractal model of tangential contact stiffness between gears's joint surfaces
Authors: Chen, Qi1 ; Zhao, Han1 ; Huang, Kang1
Author affiliation: 1 School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author: Chen, Q. (hfut.chen@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 203-206
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: On the basis of fractal model of tangential contact stiffness of joint surfaces, and combining with the fractal model of two cylinders' contact stress, calculating fractal model of tangential contact stiffness of gear joint surfaces was set up. This model synthetically considered the microcosmic characters and macroscopical factors of gear joint surfaces, and the results by the model showed no relationship with the resolving ability of the instruments and dimension independency. Simulation results indicated that the tangential contact stiffness was proportional to fractal dimension, material properties parameters and the number of gear teeth, and inversely proportional to roughness amplitude.
Number of references: 10
Main heading: Fractal dimension
Controlled terms: Cylinders (shapes) - End effectors - Gear teeth - Stiffness - Surfaces
Uncontrolled terms: Contact models - Contact Stress - Fractal model - Fractal theory - Joint surfaces - Material property - Microcosmic character - Resolving ability - Roughness amplitude - Simulation result - Tangential contact - Tangential contact stiffness - Two cylinders
Classification code: 931 Classical Physics; Quantum Theory; Relativity - 921 Mathematics - 731.5 Robotics - 951 Materials Science - 601.2 Machine Components - 421 Strength of Building Materials; Mechanical Properties - 408.2 Structural Members and Shapes - 422 Strength of Building Materials; Test Equipment and Methods
Database: Compendex
21. Accession number: 20111313882207
Title: Hard-in-loop analysis on vehicle EPS/ABS using integrated control strategy
Authors: Liu, Xiangui1 ; Chen, Wuwei1 ; Chu, Changbao1 ; Zhu, Hui1
Author affiliation: 1 School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009, China
Corresponding author: Chen, W. (cww@mail.ah.hf.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 8-13
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to coordinate the conflicts of the EPS system and EPS system in steering and braking condition, the integrated control logic of the systems was put forward. First, EPS controller and ABS controller were designed separately, and then an integrated controller was set up and controller area network was carried out to integrated control system, the results of simulation and hard-in-loop (HIL) experiment under LabView proved that the proposed integrated control logic was correct and feasible. It could apparently improve the overall performance of vehicle.
Number of references: 11
Main heading: Controllers
Controlled terms: Anti-lock braking systems - Automobile steering equipment - Braking - Computer simulation - Control system synthesis - Integrated control - Integration - Process control - Steering
Uncontrolled terms: Braking conditions - Controller area network - Electric power steering - EPS systems - Integrated control strategy - Integrated controller - Integrated controllers - LabViEW - Loop analysis
Classification code: 921.2 Calculus - 732.1 Control Equipment - 731.1 Control Systems - 731 Automatic Control Principles and Applications - 723.5 Computer Applications - 663.2 Heavy Duty Motor Vehicle Components - 602 Mechanical Drives and Transmissions
Database: Compendex
22. Accession number: 20111313882234
Title: Effect of enzymatically cross-linked beet pectin on stability of emulsion stabilized by protein
Authors: Li, Jinlong1 ; Liu, Huan2 ; Zhao, Wenting1 ; Wang, Pan1 ; Cheng, Yongqiang1 ; Yin, Lijun1
Author affiliation: 1 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
2 Quality and Standards Research Center, Chinese Academy of Fishery Sciences, Beijing 100141, China
Corresponding author: Yin, L. (ljyin@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 138-143
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Effects of reaction conditions of cross-linked beet pectin and stability of protein stabilized emulsions between horse radish peroxidase (HRP) and Laccase in the aqueous phase was analyzed. Both of the results from UV-VIS spectrophotometry and Fourier transform infrared spectrum indicated that the HRP and Laccase could catalyze the beets pectin to form covalent cross-linking. The HRP reaction system was as follows: 5 mL reaction system in total contained 6 mg beet pectin, 20U HRP, 0.5% H2O2(mass fraction) and could react 2h under 35°C. The Laccase reaction system was as follows: 5 mL reaction system in total contained 6 mg beet pectin, 15U Laccase and could react 24h under 40°C. When controlled this reaction on the interface of emulsion, the results of laser diffraction granulometer showed that the character of emulsion was inconsistent under different reaction systems. Laccase system will cause layer between bovine serum albumin and whey protein isolated emulsions. The longer of reacting time, the more obvious of layers. While in HRP reaction system, it brought improvement to the stability of bovine serum albumin emulsion.
Number of references: 22
Main heading: Emulsification
Controlled terms: Body fluids - Fourier transforms - Proteins - Spectroscopy
Uncontrolled terms: Aqueous phase - Beet pectin - Bovine serum albumins - Covalent crosslinking - Cross-linked enzymatic - Fourier transform infrared spectra - Horse radish peroxidase - Laccases - Laser diffractions - Mass fraction - Reaction conditions - Reaction system - UV-vis spectrophotometry - Whey proteins
Classification code: 801 Chemistry - 801.2 Biochemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 921.3 Mathematical Transformations
Database: Compendex
23. Accession number: 20111313882211
Title: Dynamic response of pavement based on random dynamic load of vehicle
Authors: Liu, Dawei1 ; Li, Guozheng1 ; Chen, Huanming1 ; Kang, Zhongliang1 ; Jiang, Rongchao1
Author affiliation: 1 College of Mechanical and Electronic Engineering, Qingdao University, Qingdao 266071, China
Corresponding author: Liu, D. (ldw@qdu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 28-33
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to study the influence of the random dynamic load of vehicles on the performance of half rigid asphalt road, the driving dynamic model of heavy truck was established by SIMPACK and each dynamic normal tyre force was extracted. A 3-D finite element analysis (FEA) model of half rigid asphalt road was established, and the dynamic responses of half rigid asphalt road under random dynamic load was analyzed. The results showed that the stress change of half rigid road was relative to the number of axles. When the wheels of a triaxial vehicle ran over the road in turn, the stress of each layer changed abruptly three times, and the maximal stress appeared when the middle axle and rear axle ran over. Within the vehicle driving region, the maximal press and tensile stress of each point on the pavement varied with the changes of driving distance and dynamic normal tyre force. The varied frequencies of the vertical stress, horizontal stress, transverse stress and horizontal shear stress of the points on the central line of the wheel track were similar to the varied frequency of the dynamic normal tyre force of middle and rear axles; and the varied frequency of transverse shearing stress were similar to the dynamic normal tyre force of front axle. However, the varied frequency of transverse shear stress of the points on the edge of wheel track was similar to the dynamic normal tyre force of middle and rear axles.
Number of references: 14
Main heading: Dynamic response
Controlled terms: Asphalt - Dynamic loads - Finite element method - Front axles - Pavements - Rear axles - Shear stress - Strength of materials - Three dimensional - Tires - Vehicle wheels - Vehicles
Uncontrolled terms: 3D-finite element analysis - Asphalt roads - Driving distance - Driving dynamics - Half rigid asphalt road - Heavy truck - Horizontal shear - Horizontal stress - Random dynamic load - Random dynamics - Road roughness - Shearing stress - SIMPACK - Stress changes - Transverse shear stress - Transverse stress - Tyre forces - Vertical stress - Wheel track
Classification code: 902.1 Engineering Graphics - 818.5 Rubber Products - 663.2 Heavy Duty Motor Vehicle Components - 601.2 Machine Components - 921.6 Numerical Methods - 432 Highway Transportation - 411.1 Asphalt - 408.1 Structural Design, General - 406.2 Roads and Streets - 421 Strength of Building Materials; Mechanical Properties
Database: Compendex
24. Accession number: 20111313882221
Title: Design and experiment of 3ZS-150 paddy weeding-cultivating machine
Authors: Wang, Jinwu1 ; Niu, Chunliang1 ; Zhang, Chunjian1 ; Wei, Congmei1 ; Chen, Zhenxin1
Author affiliation: 1 College of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author: Wang, J. (jinwuw@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 75-79
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on force analysis of key weeding components, 3ZS-150 paddy weeding-cultivating machine which could remove the weeds between seeding lines and inter-rows was designed. The machine motive power from the transplanter and equipped with the spring-tooth cutterhead, inter-row weeding hoe. The field performance testing showed that when the average cultivating depth was 31 mm, the cutterhead rotation speed was 186-190 r/min, and the forward velocity was 0.35 m/s, the average cleaning rate was 80.46%, the injury seedling rate was 4.76%.
Number of references: 14
Main heading: Springs (components)
Controlled terms: Experiments - Machine design
Uncontrolled terms: Cleaning rate - Field performance - Force analysis - Forward velocity - Hoe cultivation - Rotation speed - Spring-tooth cutterhead - Weeding-cultivating machine
Classification code: 601 Mechanical Design - 601.2 Machine Components - 901.3 Engineering Research
Database: Compendex
25. Accession number: 20111313882223
Title: Structural design and finite element analysis of apple seeding lifter
Authors: Yang, Xin1 ; Liu, Junfeng1 ; Li, Jianping1 ; Xu, Shucai2 ; Feng, Xiaojing1 ; Liu, Hongjie1
Author affiliation: 1 College of Mechanical and Electrical Engineering, Agricultural University of Hebei, Baoding 071001, China
2 State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Corresponding author: Liu, J. (liujf@hebau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 84-87 125
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The 3-D parameterized model of apple seeding lifter was created using autodesk inventor professional (AIP) system. The finite element analysis (FEA) of the lifter were performed through ANSYS technology embedded in AIP analysis types based on the structure, material, loads and forces of the lifter, the 3-D FEA mesh was created, and stress, displacement, and safety factor were obtained after finite element calculation. Then some modifications of lifter configuration were made according to the FEA results. The new lifter with L shape could save materials, reduce resistance. The safety factor could also achieve design purpose. The experiment of lifting seeding results showed that the lifter could provide better working performance with less resistance and obtain the expected effect.
Number of references: 12
Main heading: Finite element method
Controlled terms: Computer aided manufacturing - Fruits - Machine design - Safety factor - Seed - Structural design - Three dimensional
Uncontrolled terms: Apple - Autodesk Inventor - Expected effects - Finite element analysis - Finite element calculations - Parameterized model - Seeding lifter - Seeding lifting machine
Classification code: 408.1 Structural Design, General - 601 Mechanical Design - 821.4 Agricultural Products - 902.1 Engineering Graphics - 913.4.2 Computer Aided Manufacturing - 921.6 Numerical Methods
Database: Compendex
26. Accession number: 20111313882232
Title: Effects of 1-MCP and film packaging treatments on postharvest physiology and quality of Mopan persimmons
Authors: Zhang, Peng1 ; Li, Jiangkuo2 ; Meng, Xianjun1 ; Zhang, Ping2
Author affiliation: 1 College of Food Science, Shenyang Agricultural University, Shenyang 110161, China
2 National Engineering Technology Research Center for Preservation of Agricultural Products, Tianjin 300384, China
Corresponding author: Meng, X. (mengxjsy@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 130-133 143
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to seek an effective deastringency and crispness-keeping technique for astringent persimmons, the effects of different 1-MCP concentration, polyvinylhloride(PVC) and vacuum packaging methods on physiology and storage of Mopan persimmons under ambient temperature were investigated. Results showed that 1-MCP combined with individual vacuum packaging effectively inhibited the decline of fruit firmness, the increase of ethylene production and respiration intensity, malondialdehyde (MDA) content and peel tissue relative conductance, prevented the evaporation of fruit moisture during storage, promoted the change of the soluble tannin content to insoluble tannin content and prolonged ambient shelf life time to 14d. Therefore, 0.5 to 1.0 μL/L 1-MCP of combined with individual vacuum packaging was a suitable treatment method for Mopan persimmons.
Number of references: 16
Main heading: Vacuum evaporation
Controlled terms: Aldehydes - Ethylene - Fruits - Packaging - Physiology - Polyvinyl chlorides - Vacuum
Uncontrolled terms: 1-MCP - Crispness-keeping - Deastringency - Mopan persimmon - Vacuum packaging
Classification code: 821.4 Agricultural Products - 815.1.1 Organic Polymers - 804.1 Organic Compounds - 694.1 Packaging, General - 633.1 Vacuum Applications - 633 Vacuum Technology - 461.9 Biology
Database: Compendex
27. Accession number: 20111313882217
Title: Flow field numerical simulation of suction cylinder-seeder for rice bud seed with socket-slot
Authors: Zuo, Yanjun1 ; Ma, Xu1 ; Yu, Dalue2 ; Liao, Xinglong1
Author affiliation: 1 College of Engineering, South China Agricultural University, Guangzhou 510642, China
2 Topsearch Printed Circuits Shenzhen Co., Ltd., Shenzhen 518067, China
Corresponding author: Ma, X. (maxu1959@scau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 58-62
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A 3-D, incompressible, viscous, RNG turbulence model and the SIMPLE method were used with computational fluid dynamics(CFD), and flow fields of suction cylinder-seeder with different sockets were simulated by Fluent. When under pressure was -4kPa, productivity was 350 trays per hour, row spacing of sockets was 23 mm and pitch of holes was 31.4 mm, the pressure was uniform, the velocity was stable. Energy loss mainly occured nearby slots and export, and there was almost no interaction among sockets-slots, which indicated that sockets of cylinder-seeder were distributed reasonably in axial and circumference. The hemispherical socket was more appropriate by contrasting different sockets on average turbulent kinetic energy, average vacuum and maximum velocity difference in side of slots. The experimental results showed that hemispherical socket had the best seeding performance(85.34%) which was consistent with simulant results.
Number of references: 12
Main heading: Computational fluid dynamics
Controlled terms: Cylinders (shapes) - Electron energy loss spectroscopy - Energy dissipation - Flow fields - Flow simulation - Kinetic energy - Seed - Three dimensional - Turbulence models
Uncontrolled terms: Energy loss - Maximum velocity - Numerical simulation - Rice bud seed - RNG turbulence model - Row spacing - SIMPLE method - Socket-slot - Suction cylinder - Turbulent kinetic energy
Classification code: 931.1 Mechanics - 902.1 Engineering Graphics - 821.4 Agricultural Products - 801 Chemistry - 631.1 Fluid Flow, General - 525.4 Energy Losses (industrial and residential) - 408.2 Structural Members and Shapes
Database: Compendex
28. Accession number: 20111313882206
Title: Vehicle chassis coordination control strategy based on model predictive control
Authors: Zong, Changfu1 ; Chen, Guoying1 ; Liang, Heqi1 ; Tian, Chengwei1 ; Du, Jiangze2
Author affiliation: 1 State Key Laboratory of Automobile Dynamic Simulation, Jilin University, Changchun 130025, China
2 College of Traffic, Jilin University, Changchun 130025, China
Corresponding author: Zong, C. (cfzong@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 1-7
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Through active intervention in the vehicle vertical, horizontal and vertical dynamics, electronic control systems can improve stability and steerability of vehicle, thereby ensuring the safe driving. According to the mechanical properties of the tire, this article will coordinate active steering, active yaw moment control and active suspension with the use of model predictive control and tire force allocation strategy to achieve the coordination among the vertical, horizontal and vertical dynamics. Computer simulation results showed that the control strategy could effectively improve vehicle active safety.
Number of references: 11
Main heading: Model predictive control
Controlled terms: Automobiles - Chassis - Computer simulation - Control system stability - Mechanical properties - Predictive control systems - Vehicles
Uncontrolled terms: Active safety - Active steering - Active suspension - Active yaw moment control - Control strategies - Coordination control - Electronic control systems - Safe driving - Tire forces - Vehicle chassis - Vertical dynamics
Classification code: 951 Materials Science - 732 Control Devices - 731 Automatic Control Principles and Applications - 723.5 Computer Applications - 662.4 Automobile and Smaller Vehicle Components - 662.1 Automobiles - 432 Highway Transportation
Database: Compendex
29. Accession number: 20111313882216
Title: Design and test on pneumatic no-till wheat planter
Authors: Liu, Lijing1 ; Liu, Zhongjun1 ; Yang, Xuejun2 ; Li, Changrong1
Author affiliation: 1 Modern Agricultural Equipment Co., Ltd., Beijing 100083, China
2 State Key Laboratory of Soil-Plant-Machinery System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Liu, L. (xyliulj@sina.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 54-57
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The 2BMG-24Q pneumatic no-till wheat planter was designed. Seeds were transported into seeder pipes with high-speed air current to perform precision metering. The wavy disc coulters were used to cut stubble for sowing, and the double disc coulters were used to open furrow for fertilizing. The test results showed that the quanlification percent of seed depth and fertilizer depth were 88.3% and 85.2%, respectively.
Number of references: 11
Main heading: Pneumatics
Controlled terms: Agricultural machinery - Agriculture - Soil conservation
Uncontrolled terms: Conservation tillage - Feeding mechanism - No-till planter - Pneumatic transportation - Wheat
Classification code: 632.3 Pneumatics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
Database: Compendex
30. Accession number: 20111313882242
Title: Numerical simulation on thermal environment of heated glass greenhouse based on porous medium
Authors: Wu, Feiqing1 ; Xu, Fang2 ; Zhang, Libin2 ; Ma, Xiushui1
Author affiliation: 1 School of Information Science and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
2 Key Laboratory of Mechanical Manufacture and Automation, Zhejiang University of Technology, Hangzhou 310032, China
Corresponding author: Xu, F. (fangx@zjut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 180-185
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The thermal environment was modeled for a Venlo-type heated greenhouse at night in winter, in which the standard k-Ε turbulent model, thermal pressure, thermal radiation and porous medium model instead of the crop were included. The effects of hot wind on airflow, temperature patterns and distribution were numerically investigated using commercial computational fluid dynamics (CFD) codes. The numerical solution was made by applying a finite volume discretization with the SIMPLE algorithm. Compared with the simulation results, numerical model was validated with experimental data collected in a Venlo-type greenhouse. The temperature error was controlled in 2°C at all test points, and the relative error was mainly controlled in 10% except a few controlled in 15%. The results indicated that the CFD model based on porous medium could be effective.
Number of references: 16
Main heading: Computer simulation
Controlled terms: Computational fluid dynamics - Fluid dynamics - Fluids - Glass - Greenhouses - Heating - Mathematical models - Porous materials
Uncontrolled terms: CFD models - Computational Fluid Dynamics codes - Experimental data - Finite volume discretizations - Hot-wind heating - Numerical models - Numerical simulation - Numerical solution - Porous medium - Porous medium model - Relative errors - SIMPLE algorithm - Simulation result - Temperature error - Temperature patterns - Test points - Thermal environment - Thermal pressure - Thermal radiations - Turbulent models
Classification code: 921 Mathematics - 812.3 Glass - 723.5 Computer Applications - 951 Materials Science - 643.1 Space Heating - 631 Fluid Flow - 402.1 Industrial and Agricultural Buildings - 631.1 Fluid Flow, General
Database: Compendex
31. Accession number: 20111313882229
Title: Effects of the calculation models with different dimension on the aerodynamic performance prediction for wind turbine airfoil
Authors: Li, Yinran1 ; Li, Rennian1 ; Wang, Xiuyong1 ; Li, Deshun1
Author affiliation: 1 Wind Power Technology Center, Lanzhou University of Technology, Lanzhou 730050, China
Corresponding author: Li, R. (lirn@lut.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 115-119
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to analyze the influence of different dimensions on aerodynamic performance prediction of wind turbine airfoil, the flow fields surrounding 2-D airfoil of DU93-W-210 and 3-D straight blade were simulated by solving the N-S equations. Experimental results were compared to predict aerodynamic performances. The results revealed that if the flow did not separate, the aerodynamic performance and streamline between the 2-D airfoil and 3-D straight blade were similar, and the 3-D straight blade could be simplified into 2-D airfoil. If it separated, the flow field of 3-D straight blade had significant 3-D flow effects, the predicted aerodynamic performance was closer to experimental value than 2-D airfoil, but the 3-D straight blade could not be simplified into 2-D airfoil. The best span wise length of 3-D straight blade was 2-4 times of the chord.
Number of references: 10
Main heading: Aerodynamics
Controlled terms: Airfoils - Computational fluid dynamics - Flow fields - Fluid dynamics - Forecasting - Navier Stokes equations - Three dimensional - Turbomachine blades - Wind power - Wind turbines
Uncontrolled terms: Aerodynamic performance - Aerodynamic performance predictions - Calculation models - Dimension - Experimental values - Flow effects - N-S equations - Wind turbine airfoils
Classification code: 921.6 Numerical Methods - 921 Mathematics - 902.1 Engineering Graphics - 652.1 Aircraft, General - 651.1 Aerodynamics, General - 631 Fluid Flow - 615.8 Wind Power (Before 1993, use code 611 )
Database: Compendex
32. Accession number: 20111313882237
Title: Feedback locating control based on close scene for cucumber harvesting robot
Authors: Feng, Qingchun1 ; Yuan, Ting1 ; Ji, Chao1 ; Li, Wei1
Author affiliation: 1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author: Li, W. (liww@cau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 154-157
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to improve locating accuracy of cutting point and avoid injury of fruit and stem for cucumber harvesting robot, an end-effector with special position feedback was developed based on machine vision. As the differences of H and S distribution on HIS space between cucumber and background, the thresholds was used for image segmentation. Subsequently, the region for robotic harvesting was extracted with edge detection on G channel of RGB space and shape features analysis. Upon the data from the firstly-locating system, the spatial coordinate of the cutting point was acquired with respect to the model of linear projection. The position correction was fed back to the robot controller. The results showed that the maximum error for the cutting point location was less than 2 mm, which met the demands of the robotic harvesting operation.
Number of references: 9
Main heading: Computer vision
Controlled terms: Carbon fiber reinforced plastics - Edge detection - Feature extraction - Feedback control - Harvesting - Image segmentation - Robotics - Robots
Uncontrolled terms: Cucumber - Feature recognition - Harvesting robot - Machine vision - Terminal locating
Classification code: 716 Telecommunication; Radar, Radio and Television - 731 Automatic Control Principles and Applications - 741.1 Light/Optics - 817.1 Polymer Products - 821.3 Agricultural Methods
Database: Compendex
33. Accession number: 20111313882241
Title: Numerical prediction and CFD modeling of relative humidity and temperature for greenhouse-crops system
Authors: Cheng, Xiuhua1, 2 ; Mao, Hanping1 ; Ni, Jun1
Author affiliation: 1 Key Laboratory of Modern Agricultural Equipment and Technology, Jiangsu University, Zhenjiang 212013, China
2 Collage of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
Corresponding author: Mao, H. (maohp@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 173-179 157
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The relations between tomato crops and soil transpiration and the microclimatic factors inside and outside bi-span greenhouse were analyzed. The computational fluid dynamics (CFD) model was used to solve the temperature and relative humidity (RH) distributions based on water vapor transmission and solar radiation with the porous models, and the boundary conditions were discussed. The 3-D temperature numerical simulations were tested by means of Fluent software. The results showed the average relative errors of the simulated and the measured values were 5.7% and 2.1%, respectively. The CFD model and the boundary conditions were proved to be validated. Compared to cloudy days, the average temperature was 1.6°C higher and relative humidity was 3% lower in sunny days. The solar radiation had an effect on the temperature and RH distributions. The average temperature was 0.8°C higher and RH was 19% higher for the double density plants than that of single density plants. The temperature and RH distributions were lower near the leeward than the windward inside greenhouse, but a homogeneous pattern was observed in cropping region.
Number of references: 16
Main heading: Computational fluid dynamics
Controlled terms: Atmospheric humidity - Boundary conditions - Crops - Fluid dynamics - Fluids - Greenhouses - Porous materials - Solar radiation - Sun - Water vapor
Uncontrolled terms: Average relative error - Average temperature - CFD modeling - CFD models - Cloudy days - FLUENT software - Numerical predictions - Numerical simulation - Porous medium - Porous model - Relative humidities - Simulation - Temperature and relative humidity - Tomato crops - Water vapor transmission
Classification code: 951 Materials Science - 921.6 Numerical Methods - 921 Mathematics - 821.6 Farm Buildings and Other Structures - 821.4 Agricultural Products - 657.2 Extraterrestrial Physics and Stellar Phenomena - 657.1 Solar Energy and Phenomena - 631 Fluid Flow - 443.1 Atmospheric Properties
Database: Compendex
34. Accession number: 20111313882215
Title: Modified Bouc-Wen model based on hysteretic characteristic experiment of magneto-rheological damper
Authors: Wang, Weirui1 ; Wu, Can2 ; Chen, Ying3 ; Wang, Fang4
Author affiliation: 1 Institute of Mechanical Design, Zhejiang University, Hangzhou 310027, China
2 School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
3 Business Administration College, Zhejiang University of Finance and Economics, Hangzhou 310018, China
4 Automobile Department, Zhejiang Vocational and Technical Institute of Transportation, Hangzhou 311112, China
Corresponding author: Wu, C. (notemple@gmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 48-53
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The existing mathematical model of magneto-rheological damper (MRD) could not describe its characteristics correctly, so dynamic characteristic test on large scaled MRD was carried out. According to the test data, the dynamic nonlinear feature on elastic, damping and current saturation characteristics of MRD was analyzed with variable excitation displacement, excitation velocity and controlling current. Bouc-Wen model was not accurate enough to reflect hysteretic loop in low speed and lack hysteretic characteristics in high speed. It was also unable to express the offset phenomenon of damping force caused by pressure accumulator in single rod damper. Thus, a modified Bouc-Wen model was established. The parameters of the new model were identified with the test data, and the slope and width of hysteretic loop in velocity-force curves under high and low speed emphatically analyzed. The modified Bouc-Wen model was verified by experiment data finally.
Number of references: 9
Main heading: Damping
Controlled terms: Hysteresis - Magnetos - Mathematical models - Rheology - Stiffness
Uncontrolled terms: Bouc Wen model - Controlling current - Current saturation - Damping forces - Dynamic characteristics - Experiment data - Force Curve - Hysteretic characteristics - Hysteretic loop - Low speed - Magneto-rheological dampers - New model - Nonlinear features - Parameter modeling - Pressure accumulators - Test data
Classification code: 961 Systems Science - 951 Materials Science - 931.1 Mechanics - 921 Mathematics - 708.4 Magnetic Materials - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties
Database: Compendex
35. Accession number: 20111313882212
Title: Steering performance simulation of four-tracked vehicle
Authors: Li, Yong1, 2 ; Yao, Zongwei1 ; Wang, Guoqiang1
Author affiliation: 1 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
2 Xuzhou Construction Machinery Science and Technology Co., Ltd., Xuzhou 221005, China
Corresponding author: Wang, G. (wgq@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 34-38 47
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Based on the characteristics of four-tracked vehicles, the mathematical model of steady steering on firm ground was established, considering the crawler width and skid-steering. The influences of the factors on the steering performance were analyzed. The virtual prototype of a four-tracked vehicle was built based on the multi-body dynamics software RecurDyn and the steering tests were completed. The virtual prototype simulation results accorded well with the numerical results, which verified the correction of the theoretical model.
Number of references: 15
Main heading: Mathematical models
Controlled terms: Automobile steering equipment - Computer simulation - Steering - Tracked vehicles
Uncontrolled terms: Four-tracked vehicle - Multi-body dynamic - Numerical results - Numerical simulation - Steering performance - Theoretical models - Virtual prototype - Virtual prototype simulation
Classification code: 663 Buses, Tractors and Trucks - 663.2 Heavy Duty Motor Vehicle Components - 723.5 Computer Applications - 921 Mathematics
Database: Compendex
36. Accession number: 20111313882226
Title: Bionic threshing process analysis of seed corn kernel
Authors: Li, Xinping1 ; Li, Yuzhu1 ; Gao, Hang1 ; Qiu, Zhaomei1 ; Ma, Fuli1 ; Gao, Lianxing2
Author affiliation: 1 College of Vehicle and Motive Power Engineering, Henan University of Science and Technology, Luoyang 471003, China
2 College of Agriculture Engineering, Shenyang Agricultural University, Shenyang 110161, China
Corresponding author: Gao, L. (lianxinggao@126.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 99-103
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: On the basis of analysis of biomechanics of corn kernel and structure of rooster beak, experiment of rooster beak pecking corn kernel on single corn ear was conducted. The experimental results showed that under suitable moisture content, in order to make kernel low damage thresh, the supportive role between kernels must be broken firstly according to certain law. Under the same moisture content, capacity loaded was different for three surfaces of corn kernel. Force loaded at ventro-surface of corn kernel was the largest. The force at the top surface of corn kernel was the least. While choose position loaded, it's better to avoid top surface loaded of kernel. Rooster beak not only had good ability of inserting kernel cleft, but also stronger ability of pecking corn kernel. The partition that rooster beak inserted corn ear was gap between longitudinal lines. The process that rooster beak inserted corn kernel was the functional process that a triangular wedge inserted corn kernel cleft, that rooster beak inserted same partition could make kernel low damage thresh or loose. When rooster beak pecks lax kernel, it could produce the pull, and corn kernel could thresh, as the pull was bigger than the connection force of fruit handle of corn kernel. This research could provide a bionics basis on improving the geometrical shape of threshing parts and designing low damage seed corn thresher.
Number of references: 14
Main heading: Agriculture
Controlled terms: Biomechanics - Bionics - Biophysics - Moisture - Moisture determination - Seed
Uncontrolled terms: Connection force - Corn kernels - Corn seed - Geometrical shapes - Low damages - Moisture contents - Process analysis - Threshing - Top surface
Classification code: 931.1 Mechanics - 931 Classical Physics; Quantum Theory; Relativity - 821.4 Agricultural Products - 944.2 Moisture Measurements - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 731.1 Control Systems - 701 Electricity and Magnetism - 801.4 Physical Chemistry
Database: Compendex
37. Accession number: 20111313882218
Title: Design and experiment of precision metering device for slot wheeled seeder
Authors: Liao, Qingxi1 ; Huang, Jixing1 ; Liu, Guang1 ; Lin, Laifu1
Author affiliation: 1 College of Engineering and Technology, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author: Liao, Q. (liaoqx@mail.hzau.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 63-66
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A slot wheeled precision metering device for rapeseeds was designed. The structure and working principle were studied. The metering mechanism mainly consisted of a seed-cleaning wheel axle, a seed-retaining belt and a weed-pushing ringed wire-steel. By experiments, the key structure and performance parameters were analyzed and determined, the lowest seed damage index was obtained when the speed of seed-cleaning wheel axle was 104 r/min, the diameter of shaped hole was 2.8 mm and the inclined angle of wire steel was 33°.
Number of references: 13
Main heading: Wheels
Controlled terms: Axles - Damage detection - Oilseeds - Wire
Uncontrolled terms: Inclined Angle - Precision metering - Rapeseed - Seed damage - Shaped holes - Slot wheeled type - Structure and performance - Wire steels - Working principles
Classification code: 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 535.2 Metal Forming - 601.2 Machine Components - 682.1.1 Railroad Cars - 821.4 Agricultural Products
Database: Compendex
38. Accession number: 20111313882247
Title: Analysis of distribution characteristics of gear surface flash temperature for spiral bevel
Authors: Gu, Jiangong1 ; Fang, Zongde1 ; Yang, Xiaofang1
Author affiliation: 1 School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
Corresponding author: Gu, J. (agunwpu@hotmail.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 207-211
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The mean friction coefficient on tooth surface was calculated under mixed elastohydrodynamic lubrication based on Blok's flash temperature formula. Furthermore, the mean friction coefficient of the formula was modified, and the formula was improved. Meanwhile, through calculating the tangential velocity, half width of Hertz contact zone and load distribution factor along the meshing point of spiral bevel gears, the formulas to calculate the flash temperatures along the contact path and whole tooth surface of spiral bevel gears under mixed elastohydrodynamic lubrication were proposed respectively, which provided a comprehensive and accurate method for its calculation of scuffing load capacity. The results of analyzing the calculation example indicated that the maximum flash temperature along the contact path located in the middle recess path, and the one of the whole tooth surface was between the pitch cone and dedendum of gear, where the scuffing failure showed the most possibly.
Number of references: 17
Main heading: Bevel gears
Controlled terms: Elastohydrodynamic lubrication - Elastohydrodynamics - Friction - Tribology
Uncontrolled terms: Flash temperatures - Mean friction coefficient - Mixed elastohydrodynamic lubrication - Scuffing - Spiral bevel gears
Classification code: 601.2 Machine Components - 607.2 Lubrication - 931 Classical Physics; Quantum Theory; Relativity - 931.1 Mechanics
Database: Compendex
39. Accession number: 20111313882233
Title: Preparation and application of cationic starch flocculant with high substituted degree
Authors: Li, Shujun1 ; Xie, An1 ; Lin, Yaling1
Author affiliation: 1 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Li, S. (lisj@caams.org.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 134-137
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: The quaternary amino groups containing cationic starch with the degree of substitution 0.3903 was prepared via the reaction of potato starch with 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride using pre-drying dry process. Then the cationic starch (CS) and poly ferric sulfate (PFS) would be used to treat potato starch waste water. And the cleaning efficiency of the chemical oxygen demand (COD) in the wastewater was studied by changing the experiment conditions. Though the orthogonal test, the optimal conditions were as follows: CS addition 0.15%, PFS addition 0.15%, initial reaction pH 7.0. The removal rate of COD was 64.31%.
Number of references: 6
Main heading: Starch
Controlled terms: Ammonium compounds - Chemical cleaning - Chemical oxygen demand - Chlorine compounds - Flocculation - Iron compounds - Oxygen - Sewage - Wastewater - Wastewater treatment
Uncontrolled terms: Amino group - Ammonium chloride - Cationic starches - Cleaning efficiency - Degree of substitution - Dry process - Experiment condition - Ferric sulfate - Flocculant - Optimal conditions - Orthogonal test - Potato starch waste - Potato starches - Pre-drying - Removal rate - Removal rate of COD - Trimethyl
Classification code: 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 802.3 Chemical Operations - 804 Chemical Products Generally
Database: Compendex
40. Accession number: 20111313882230
Title: Aerodynamic performance prediction for darrieus wind turbine in view of dynamic stall and finite aspect ratio effects
Authors: Liu, Zhanfang1 ; Yan, Shijun1 ; Zhang, Kai1 ; Deng, Zhichun1
Author affiliation: 1 College of Resource and Environmental Sciences, Chongqing University, Chongqing 400044, China
Corresponding author: Liu, Z. (zhanfang@cqu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 120-125
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Considering the unsteady aerodynamic characteristics of the vertical axis wind turbine (VAWT) blade at low speed ratios, the B-L dynamic stall model was modified. The finite aspect ratio effects and blade tip loss were taken into account to modify the aerodynamic characteristics for constant chord blade. Based on the double-multiple stream tube method (DMST) in aerodynamic analysis, an improved aerodynamic performance prediction model for VAWT was developed combining with the dynamic stall model and predicting method for the effects of finite aspect ratio. The aerodynamic performance of 17 m VAWT by Sandia National Laboratory was calculated. The effects of the dynamic stall and finite aspect ratios were analyzed, and the rotor power and power coefficients were compared and analyzed between the test and evaluation results. Feasibility of the prediction model to evaluate the aerodynamic performance for VAWT was proved.
Number of references: 15
Main heading: Aspect ratio
Controlled terms: Aerodynamic stalling - Forecasting - Hydraulics - Mathematical models - Turbomachine blades - Wind power - Wind turbines
Uncontrolled terms: Aerodynamic evaluation - Dynamic stall - Finite aspect ratio - Multiple streams - Vertical axis wind turbines
Classification code: 615.8 Wind Power (Before 1993, use code 611 ) - 618 Compressors and Pumps - 632.1 Hydraulics - 651.1 Aerodynamics, General - 921 Mathematics - 943 Mechanical and Miscellaneous Measuring Instruments
Database: Compendex
41. Accession number: 20111313882219
Title: Analysis for magnetic field characteristics of magnetic seed-metering elements and structure optimization
Authors: Hu, Jianping1 ; Wang, Xun1 ; Yan, Junchao1 ; Zheng, Sainan1
Author affiliation: 1 Key Laboratory of Modern Agriculture Equipment and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author: Hu, J. (hujp@ujs.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 67-70
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Magnetic seed-metering element is the core components of the magnetic precision seeder. In order to improve performance, a new seed-metering element with magnetic shield was put forward. By using FEA software, the magnetic field characteristics were analyzed for two kinds of seed-metering elements with and without magnetic shields, respectively. The distribution of magnetic induction intensity was obtained at head face, as well as air-gap space of the two kinds of seed-metering elements. The research results showed that the magnetic energy utilization and magnetic induction of the seed-metering element with magnetic shield was higher than the other one which had no magnetic shield, and the intensity of magnetic induction at the end of seed-metering element which had magnetic shield was higher, 30.41% than that non-magnetic shield element on the same number of amperes turns, so it was lustrated that the performance of the element with magnetic shield should be better than non-magnetic shield element. By analyzing and comparing axial and transverse magnetic induction for the three kinds of seed-metering elements with magnetic shields, obtained cone element was the optimal model. The experiments including the intensity of magnetic induction, the lowest electric current and seed-metering performance verified the theoretical analysis and optimized element were correct.
Number of references: 11
Main heading: Magnetic shielding
Controlled terms: Electromagnetic shielding - Energy utilization - Magnetic fields - Seed - Structural design - Structural optimization
Uncontrolled terms: Air-gaps - Core components - FEA software - Head face - Magnetic - Magnetic field analysiss - Magnetic field characteristic - Magnetic induction - Magnetic induction intensity - Magnetic seed - Magnetic shields - Metering elements - Nonmagnetics - Optimal model - Precision seeder - Research results - Structure optimization - Transverse magnetic
Classification code: 408.1 Structural Design, General - 525.3 Energy Utilization - 701.2 Magnetism: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 821.4 Agricultural Products - 921.5 Optimization Techniques
Database: Compendex
42. Accession number: 20111313882227
Title: Experiment on thresher of maize pair seeds
Authors: Wang, Jing1 ; Nie, Ying2 ; Gong, Yuanjuan1 ; Zhang, Huiquan2 ; Sun, Rongqiang3
Author affiliation: 1 College of Engineering, Shenyang Agricultural University, Shenyang 110161, China
2 Liaoning Agricultural Mechanization Institute, Shenyang 110161, China
3 Haicheng Agricultural Mechanization School, Haicheng 114200, China
Corresponding author: Gong, Y. (yuanjuangong@163.com)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 104-108
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In order to improve the thresh efficiency of maize pair seeds and reduce the percentage of damaged seeds, experiments were carried out about the maize pair seeds thresher. The variety of maize was Meiyu No.3. The quadratic orthogonal tests were used. The effect of average water content, maize ear average diameter, thresher drilling tool diameter and drill angle on thresh percentage of pair seeds and damaged seeds of maize was analyzed. The mathematical model was developed. Taken the highest thresh percentage of pair seeds and the lowest percentage of damaged seeds as an evaluation index, the optimal parameters of thresher were obtained through multi-goal non-linear optimizing method. When the average diameter of maize ear was 39 mm, the ear water content was 44%, the drilling tool diameter was 23 mm and its angle was 74°. When the maize ear average diameter was 42 mm, the ear water content was 44%, the drilling tool diameter was 24 mm and its angle was 72°. When the maize ear average diameter was 47 mm, the ear water content was 44%, the drilling tool diameter was 25 mm and its angle was 70°.
Number of references: 11
Main heading: Seed
Controlled terms: Agriculture - Equipment - Experiments - Mathematical models - Optimal systems - Optimization - Water content
Uncontrolled terms: Drilling tool - Maize - Optimal design - Pair seeds - Thresher
Classification code: 921.5 Optimization Techniques - 921 Mathematics - 901.3 Engineering Research - 901 Engineering Profession - 821.4 Agricultural Products - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 444 Water Resources
Database: Compendex
43. Accession number: 20111313882210
Title: Vehicle states estimation technology based on particle filter algorithm
Authors: Lin, Fen1 ; Zhao, Youqun1 ; Xu, Shuonan1
Author affiliation: 1 Department of Automotive Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Corresponding author: Lin, F. (nhlf2008@yahoo.com.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 23-27 22
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Particle filter (PF) algorithm was used in vehicle states estimation. A vehicle dynamics system containing constant noise and non-linear tire model was established. First, the particles were predicted through non-linear state transition function; then the weights of the predicted particles were evaluated based on current measurements. Finally, the key states were estimated though resample step. The PF estimator was compared with other estimators based on extended Kalman filter (EKF) and unscented Kalman filter (UKF). The results of virtual experiment based on ADAMS/Car and real vehicle experiment demonstrated that PF was available in vehicle states estimation.
Number of references: 11
Main heading: Vehicles
Controlled terms: Algorithms - Estimation - Experiments - Kalman filters - Nonlinear filtering - Virtual reality
Uncontrolled terms: In-vehicle - Non-linear - Nonlinear state - On currents - Particle filter - Particle filter algorithms - Real vehicles - Resamples - States estimation - Technology-based - Tire models - Unscented Kalman Filter - Vehicle dynamics - Vehicle state - Virtual experiment - Virtual experiments
Classification code: 432 Highway Transportation - 723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 901.3 Engineering Research - 921 Mathematics
Database: Compendex
44. Accession number: 20111313882236
Title: Statics analysis of apple-picking robot humanoid manipulator
Authors: Cui, Peng1 ; Chen, Zhi1 ; Zhang, Xiaochao1
Author affiliation: 1 State Key Laboratory of Soil-Plant-Machine System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Zhang, X. (zxc@caams.org.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 149-153
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: A humanoid manipulator applying to the end effector of an apple picking robot was introduced. Substituting a tendon-actuated manipulator for the simple gripper can improve the adaptability for the end effector to catch apples in intricate surroundings. To realize the open-loop control of the tendon-actuated manipulator, the relationship model of the actuating force and grasping force is necessary. By simulation, the model was established in this paper. Under the same actuating force, the grasping force of the tendon-actuated humanoid manipulator was related to the parameters of mechanism. The virtual grasping force was determined by the length and thickness of fingers. The distribution of grasping force was determined by the lengthy proportions of the phalanges. The original angle between the fingers determined the radius range of the apples. As the radius of apples increased, the virtual grasping force decreased. Frictions could homogenize the distribution of grasping force as well as enlarge the virtual force.
Number of references: 17
Main heading: End effectors
Controlled terms: Computer simulation - Fruits - Manipulators - Tendons
Uncontrolled terms: Actuating forces - Apple - Grasping force - Humanoid manipulator - Open loop control - Picking robot - Relationship model - Statics analysis - Virtual forces - Virtual grasping
Classification code: 461.2 Biological Materials and Tissue Engineering - 723.5 Computer Applications - 731.5 Robotics - 821.4 Agricultural Products
Database: Compendex
45. Accession number: 20111313882231
Title: Effect of freeze-drying factors on collapse temperature
Authors: Zuo, Jianguo1 ; Li, Weizhong1 ; Weng, Lindong1
Author affiliation: 1 School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Corresponding author: Zuo, J. (jgzuo@dlut.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 126-129
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: Freeze-drying microscopy was used to investigate the effect of freezing rate, pressure and mass fraction on the collapse temperature (Tc) during freeze-drying of aqueous solutions, and differential scanning calorimetry was used to investigate the glass transition temperature (T′g) of the maximally freeze concentrated solution. The experimental results showed that for 10% sucrose/water binary solution, the freezing rate had little effect on Tc although it could affect the size of ice crystals. For 10% tertiary butyl alcohol/10% sucrose/water ternary solution, both T′g and Tc decreased with the increase of freezing rate. Few variations in collapse temperatures could be expected when varying the pressure. For sucrose aqueous solutions at different mass fractions (5%-25%), the variation of collapse temperature was less than 1°C.
Number of references: 13
Main heading: Glass transition
Controlled terms: Calorimeters - Curing - Differential scanning calorimetry - Drying - Freezing - Glass - Low temperature drying - Pressure effects - Scanning - Solutions - Sugar (sucrose)
Uncontrolled terms: Aqueous solutions - Binary solutions - Collapse temperature - Concentrated solution - Different mass - Freeze-drying - Freeze-drying microscopy - Freezing rate - Glass transition temperature - Ice crystals - Mass fraction - Sucrose aqueous solution - Ternary solution
Classification code: 931.1 Mechanics - 822.3 Food Products - 812.3 Glass - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 802.3 Chemical Operations - 802.2 Chemical Reactions - 801 Chemistry - 741.3 Optical Devices and Systems
Database: Compendex
46. Accession number: 20111313882249
Title: Failure mode analysis of machining center based on random fuzzy theory
Authors: Shen, Guixiang1 ; Fan, Shaohua1 ; Zhang, Yingzhi1 ; Yao, Jinjiu2 ; Chen, Bingkun1
Author affiliation: 1 School of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
2 Changchun Yiqi Sedan Stock Co., Ltd., Changchun 130025, China
Corresponding author: Zhang, Y. (zhangyz@jlu.edu.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 216-219 228
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: In the analysis of the typical failure mode, randomness and fuzziness were taken into consideration, time between failures was defined as a random fuzzy variable, then the occurrence chance model was built. Random fuzzy method was used to calculate the occurrence chances of typical failure modes and the ranking. By virtue of the analysis of the occurrence chances and occurrence frequencies, some important conclusions could be made out. The failure mode which influenced the machining center most could be found out, the conclusions provided useful basis on how to eliminate these failure models and how to improve the reliability of machining center of this type.
Number of references: 8
Main heading: Failure modes
Controlled terms: Fuzzy logic - Machining - Machining centers - Quality assurance - Random variables - Reliability analysis
Uncontrolled terms: Failure mode analysis - Failure model - Fuzzy theory - Random fuzzy variable - Random-fuzzy method - Time between failures
Classification code: 921 Mathematics - 913.3 Quality Assurance and Control - 913 Production Planning and Control; Manufacturing - 922.1 Probability Theory - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 603.1 Machine Tools, General - 421 Strength of Building Materials; Mechanical Properties - 604.2 Machining Operations
Database: Compendex
47. Accession number: 20111313882248
Title: Real-time data monitoring based on XidML in reliability experiment for agricultural equipment
Authors: Ye, Ge1 ; Zhang, Shuming1 ; Li, Shujun1 ; Tian, Zhaofeng1 ; Yan, Chuliang1
Author affiliation: 1 State Key Laboratory of Soil-Plant-Machinery System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author: Ye, G. (jacky@caams.org.cn)
Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery
Abbreviated source title: Nongye Jixie Xuebao
Volume: 42
Issue: 2
Issue date: February 2011
Publication year: 2011
Pages: 212-215 206
Language: Chinese
ISSN: 10001298
CODEN: NUYCA3
Document type: Journal article (JA)
Publisher: Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract: By taking the data acquisition scheme as an example, an analytical method for dynamic data frame format of the data acquisition system was proposed based on the XidML file. It achieved the real-time test data monitoring and the playback of the acquisition data including load spectrum/environmental spectrum tests and the reliability enhancement testing for the combines, tractors and other agricultural equipment. This method significantly improved the efficiency of field testing.
Number of references: 13
Main heading: Monitoring
Controlled terms: Automobile testing - Equipment - Experiments - Load testing - Reliability - Tractors (agricultural)
Uncontrolled terms: Agricultural equipment - Analytical method - Data acquisition system - Dynamic data - Field testing - Load spectrum - Real-time data - Real-time test - Reliability enhancement - XidML
Classification code: 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 901.3 Engineering Research - 901 Engineering Profession - 663.1 Heavy Duty Motor Vehicles - 663 Buses, Tractors and Trucks - 662 Automobiles and Smaller Vehicles - 483.1 Soils and Soil Mechanics - 421 Strength of Building Materials; Mechanical Properties
Database: Compendex
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