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移動(dòng)并聯(lián)式六自由度轉(zhuǎn)運(yùn)調(diào)姿方法研究
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Six Degrees of Freedom Transfer and Attitude Adjustment Method of Mobile Parallel
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    摘要:

    針對(duì)大型航天相機(jī)長(zhǎng)距離轉(zhuǎn)運(yùn)和快速精確自動(dòng)調(diào)姿需求,提出一種基于全向移動(dòng)平臺(tái)和3-RPS并聯(lián)調(diào)姿機(jī)構(gòu)的移動(dòng)并聯(lián)式六自由度調(diào)姿方法,。首先,,測(cè)得相機(jī)當(dāng)前姿態(tài)和目標(biāo)姿態(tài),推導(dǎo)二者位姿矩陣,;通過運(yùn)動(dòng)學(xué)模型反解全向移動(dòng)平臺(tái)和并聯(lián)調(diào)姿機(jī)構(gòu)的各軸運(yùn)動(dòng)參數(shù),,將多軸耦合的空間六自由度完全解耦;建立全向移動(dòng)平臺(tái)和并聯(lián)機(jī)構(gòu)的運(yùn)動(dòng)學(xué)模型,,實(shí)現(xiàn)上述運(yùn)動(dòng)參數(shù)的驅(qū)動(dòng),;最后,進(jìn)行了調(diào)姿算法試驗(yàn),,結(jié)果表明,,調(diào)姿設(shè)備能夠快速精準(zhǔn)實(shí)現(xiàn)大型相機(jī)任意姿態(tài)向目標(biāo)姿態(tài)的自動(dòng)化柔性姿態(tài)調(diào)整,全向移動(dòng)平臺(tái)移動(dòng)精度優(yōu)于0.3mm,,旋轉(zhuǎn)精度優(yōu)于0.05°,,并聯(lián)機(jī)構(gòu)桿長(zhǎng)精度優(yōu)于0.5mm,驗(yàn)證了自動(dòng)調(diào)姿的準(zhǔn)確性,。

    Abstract:

    Aiming to improve the automatic attitude adjustment efficiency and accuracy and long-distance transfer of astronautic camera, a mobile six degrees of freedom attitude adjustment method, based on omni-directional mobile platform and 3-RPS parallel pose adjustment mechanism, was proposed. Firstly, the mathematical model and measurement coordinate system of attitude adjustment were established according to the actual application scenarios. Secondly, the current attitude of the camera and the target attitude were measured, and the attitude matrix of the current attitude relative to the target was derived according to the relationship between the measured actual attitude and the pose of each coordinate system. Thirdly, the motion parameters of each axis of the above mechanisms were inversely solved by the kinematic model. Then the motion model of the omni-directional platform and the parallel mechanism was established to realize the driving of the above motion parameters. Finally, the test verification showed that the attitude adjusting equipment was fast and accurate enough to realize the automatic flexible attitude adjustment of the large-scale camera. The moving accuracy of the omnidirectional mobile platform was within 0.3mm, and the rotating accuracy was within 0.05°, and the rod length accuracy of the parallel mechanism was within 0.5mm.

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于榮榮,李永亮,董禮港,呂寵,王國(guó)欣.移動(dòng)并聯(lián)式六自由度轉(zhuǎn)運(yùn)調(diào)姿方法研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2021,52(7):421-426. YU Rongrong, LI Yongliang, DONG Ligang, Lü Chong, WANG Guoxin. Six Degrees of Freedom Transfer and Attitude Adjustment Method of Mobile Parallel[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(7):421-426.

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  • 收稿日期:2020-06-26
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  • 在線發(fā)布日期: 2021-07-10
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