Thermodynamic analysis of a space station remote manipulator with a harmonic drive that considers an integrated thermal protection layer

• Published in: Science China. Technological sciences Vol. 58; no. 11; pp. 1884 - 1893
• Main Authors: Zhao, JieLiang, Yan, ShaoZe, Wu, JiaNing, Ma, Wei, Han, ZengYao
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.11.2015
• Subjects: Engineering; 保护层; 地球静止轨道; 夹层结构; 机械臂; 热力学分析; 空间站; 运动精度; 遥控机械手; Space station remote manipulator; integrated thermal protection system; dynamic behavior; harmonic drive; thermal analysis
• ISSN: 1674-7321; 1869-1900
• DOI: 10.1007/s11431-015-5871-7

To eliminate anomalies and improve the performance of a space station remote manipulator （SSRM） used in a dynamically changeable thermal environment, we analyze the thermodynamic behavior of an SSRM that considers an integrated thermal protection system （ITPS）. Solar radiative heat gain and loss become equally significant as conductive heat transfers through the interior of the SSRM on orbit. A thermodynamic model of the SSRM with a sandwich ITPS structure is established on the coupling between harmonic drive and changeable thermal environment. A motion precision is proposed to evaluate thermody- namic behavior under continuously changeable thermal circumstances. Simulation results indicate that the ITPS with a corrugated sandwich structure reduces the maximum amplitude of angular position errors to 41.6%, which helps improve the motion precision of the SSRM. The feasible regions for the SSRM in the Low Earth Orbit （LEO） and Geostationary Earth Orbit （GEO） are analyzed, which shows that the proportion of feasible region in LEO is significantly larger than that in GEO.