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基于雙擺模型的油茶果冠層振動參數(shù)優(yōu)化與試驗
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國家重點研發(fā)計劃項目(2016YFD0702105)


Optimization Analysis and Test of Canopy Vibration Parameters of Camellia Fruit Based on Double Pendulum Model
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    為研究振動參數(shù)對油茶果采摘的影響,本文建立了油茶“果實-枝條”雙擺動力學(xué)模型,通過求解動力學(xué)模型得出系統(tǒng)固有頻率為0.42、7.18Hz;根據(jù)對油茶果實和花苞受力分析,得出油茶果實和花苞振動脫落所需的平均加速度分別為427.15、1.936m/s2;利用ADAMS動力學(xué)仿真軟件對油茶果冠層振動采摘進(jìn)行了仿真試驗,利用Design-Expert 11.0.4軟件對試驗數(shù)據(jù)進(jìn)行分析和優(yōu)化并進(jìn)行田間試驗驗證,理論優(yōu)化結(jié)果為振動時間8.09s、振動頻率8.15Hz、振幅50mm時,油茶果實采收率為93.41%,油茶花苞損傷率為14.10%。田間試驗結(jié)果表明,針對湘林210品種油茶樹,當(dāng)冠層振動時間8s、振動頻率8Hz、振幅50mm時,油茶果實采收率和花苞損傷率平均值分別為92.37%、14.38%,與理論優(yōu)化值的差值分別為1.04、0.28個百分點。

    Abstract:

    Mechanized picking of camellia fruit mainly uses vibration. In order to study the effect of canopy vibration parameters on the picking of Camellia oleifera, a camellia “fruit-branch” double pendulum dynamic 〖JP2〗model was established, the natural frequencies of the system were 0.42Hz and 7.18Hz by solving the dynamic model. According to the force analysis of the fruit and flower buds of the camellia, the average acceleration of the fruit and flower bud shedding of the camellia was 427.15m/s2 and 1.936m/s2, respectively; ADAMS dynamic simulation software was used to simulate the vibration picking of camellia fruit canopy. The variance and response surface analysis of the test data were carried out by using Design-Expert 11.0.4 software, and the quadratic regression models of oil camellia fruit recovery and flower bud damage rate with vibration time, vibration frequency and amplitude were established. By calculating the contribution rate of test factors to test indexes and optimizing canopy vibration parameters, the optimal theoretical value was obtained as follows: vibration time of 8.09s, vibration frequency of 8.15Hz, amplitude of 50mm, oil camellia fruit recovery rate was 93.41% and oil camellia flower bud damage rate was 14.10%, which were verified by field tests. Results showed that under the parameter combination of vibration time was 8s, vibration frequency was 8Hz and amplitude was 50mm, the average value of XIANG-LIN 210 camellia fruit recovery rate and bud damage rate were 92.37% and 14.38%, the difference with the theoretical optimal value was 1.04 and 0.28 percentage points, respectively. The experimental results can provide theoretical basis for the design of camellia fruit picking equipment.

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伍德林,趙恩龍,姜山,丁達(dá),劉洋洋,劉路.基于雙擺模型的油茶果冠層振動參數(shù)優(yōu)化與試驗[J].農(nóng)業(yè)機(jī)械學(xué)報,2021,52(12):96-104. WU Delin, ZHAO Enlong, JIANG Shan, DING Da, LIU Yangyang, LIU Lu. Optimization Analysis and Test of Canopy Vibration Parameters of Camellia Fruit Based on Double Pendulum Model[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(12):96-104.

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  • 收稿日期:2021-09-06
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  • 在線發(fā)布日期: 2021-10-23
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