The study of thermal-structural coupling deformation analysis for flexible space manipulator in orbit

IF 17.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-05-21 DOI:10.1115/1.4065580

Fuli Zhang, Fuzhi Zhang, Na Liang

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Abstract

The space manipulator can assist astronauts to accomplish space activities, including docking, fixing, and grasping. It is subjected to thermal radiation and produces thermal deformation during orbit operation, which makes the operation of the space manipulator deviate from the predetermined trajectory and further affects its positioning accuracy. Therefore, to solve the problem of bidirectional coupling thermal-structure deformation analysis and positioning accuracy for space manipulator, based on the thermal-structural bidirectional coupling deformation analysis, a method of its thermal deformation on the output positioning accuracy of space flexible manipulator is proposed. It analyzes the bidirectional coupling relationship between the temperature and its thermal deformation for the manipulators. Then, the influence of thermal deformation on the output joint error and end positioning accuracy of the space manipulator are analyzed. Finally, the validity of this method is verified by numerical analysis. Compared with the unidirectional coupling model, the bidirectional coupling model comprehensively considers the structure, deformation and temperature of manipulators. It is closer to the real system. Thermal deformation will reduce the reliable runtime of the space manipulator in orbit. The study provides a theoretical basis for its thermal design and control.

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在轨柔性空间机械手的热结构耦合变形分析研究

空间机械手可协助宇航员完成对接、固定和抓取等空间活动。它在轨道运行过程中会受到热辐射并产生热变形，使空间机械手的运行偏离预定轨迹，进一步影响其定位精度。因此，为解决空间机械手双向耦合热结构变形分析和定位精度问题，在热结构双向耦合变形分析的基础上，提出了其热变形对空间柔性机械手输出定位精度的影响方法。它分析了温度与机械手热变形之间的双向耦合关系。然后，分析了热变形对空间机械手输出关节误差和末端定位精度的影响。最后，通过数值分析验证了该方法的有效性。与单向耦合模型相比，双向耦合模型综合考虑了机械手的结构、变形和温度等因素。它更接近真实系统。热变形会缩短空间机械手在轨可靠运行时间。该研究为其热设计和控制提供了理论依据。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.