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基于模型的冗余驅(qū)動(dòng)并聯(lián)機(jī)構(gòu)神經(jīng)網(wǎng)絡(luò)同步協(xié)調(diào)控制
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國(guó)家自然科學(xué)基金項(xiàng)目(51675458、51675459)、河北省自然科學(xué)基金項(xiàng)目(E2017203387)和河北省高等學(xué)校青年拔尖人才計(jì)劃項(xiàng)目(BJ2017060)


Model-based Synchronous Control of Redundantly Actuated Parallel Manipulator with Neural Network
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    冗余驅(qū)動(dòng)并聯(lián)機(jī)構(gòu)驅(qū)動(dòng)數(shù)目大于自由度數(shù)目,其各驅(qū)動(dòng)關(guān)節(jié)間需要具有更高的驅(qū)動(dòng)協(xié)調(diào)性。為了解決冗余驅(qū)動(dòng)并聯(lián)機(jī)構(gòu)的驅(qū)動(dòng)協(xié)調(diào)問(wèn)題,本文提出了一種基于模型的驅(qū)動(dòng)力同步協(xié)調(diào)控制方法。以冗余驅(qū)動(dòng)并聯(lián)機(jī)構(gòu)6PUS+UPU為研究對(duì)象,在力位混合驅(qū)動(dòng)的基礎(chǔ)上,提出了一種驅(qū)動(dòng)力同步協(xié)調(diào)控制策略;結(jié)合神經(jīng)網(wǎng)絡(luò)設(shè)計(jì)了驅(qū)動(dòng)力同步控制器,并基于機(jī)構(gòu)動(dòng)力學(xué)模型設(shè)計(jì)了神經(jīng)網(wǎng)絡(luò)自學(xué)習(xí)算法。模型仿真與樣機(jī)實(shí)驗(yàn)分別驗(yàn)證了本文方法的有效性。

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    Redundantly actuated parallel manipulator demands higher actuation coordination than the non-redundantly actuated one, thanks to its degree of actuation exceeding its degree of freedom. To improve the actuation coordination of redundantly actuated parallel manipulator, a novel model-based driving force synchronous control method with neural network was proposed. With 6PUS+UPU parallel manipulator as object, dynamic model was derived based on virtual work principle. To improve the actuation coordination of redundantly actuated parallel manipulator, a novel driving force synchronous control method was proposed on basis of force-position hybrid actuation. The synchronous control method was based on the driving force error of actuated joints and driving force adjustment was calculated by the synchronous controller. The synchronous controller was designed with neural network. What’s more, the learning law of neural network controller was derived with manipulator’s dynamic model to improve the learning efficiency. Model simulation and prototype experiment were carried out, and a performance comparison analysis with traditional force-position hybrid actuation method was made to verify the proposed control method. Comparison analysis revealed that, comparing with the traditional force-position hybrid actuation method, driving force synchronous control with neural network proposed could effectively improve the actuation coordination of redundantly actuated parallel manipulator. The results revealed that the synchronous control method reduced the driving force errors of whole manipulator by properly magnifying the control error of force actuated joint.

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劉曉飛,姚建濤,趙永生.基于模型的冗余驅(qū)動(dòng)并聯(lián)機(jī)構(gòu)神經(jīng)網(wǎng)絡(luò)同步協(xié)調(diào)控制[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2018,49(2):367-375. LIU Xiaofei, YAO Jiantao, ZHAO Yongsheng. Model-based Synchronous Control of Redundantly Actuated Parallel Manipulator with Neural Network[J]. Transactions of the Chinese Society for Agricultural Machinery,2018,49(2):367-375.

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  • 收稿日期:2017-06-26
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  • 在線發(fā)布日期: 2018-02-10
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