摘要: |
极高星敏主法兰采用SiC/Al复合材料开展设计,通过多点对称辐射分布式子柔性单元布局方式实现主法兰的微形变,以保证其高刚度和高稳定性。探讨了多点对称辐射分布式柔性结构的刚度问题,对多点对称辐射分布式柔性主法兰进行轻量化设计,获取最佳结构分布,实现了极端力、热环境下SiC/Al主法兰微米尺度形变设计与制造;通过工程分析和试验完成了主法兰的性能评价,结果表明主法兰相对变形为9μm、热稳定为0.05″/℃,基频为160Hz,柔性单元位置的应力为76MPa,消除了整机力热试验低频漂移和高频紊乱现象,整机具有较高的力热环境适应性。 |
关键词: 极高星敏;主法兰;SiC/Al复合材料;微形变 |
基金项目:国家航天重大工程专项、国家自然科学基金(No.51905034、No.52275083);国家重点研发计划项目(No.2021YFB3203100) |
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Design, Manufacture and Evaluation of Micro-deformation of SiC/Al Main Flange for Ultra-high Star Tracker |
Wang Xiaoyan Li Lin Bai Shan Zhong Jun Sui Jie? Wang Miaomiao Wang Yanbao
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Space Optoelectronic Measurement and Perception Lab., Beijing Institute of Control Engineering, Beijing 100190
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Abstract: |
The main flange is designed with SiC/Al material, and micro-deformation of main flange is realized through muti-point symmetric radiation distributed flexible unit layout to ensure its good performance. The stiffness of muti-point symmetric radiation distributed flexible structure is discussed, and the lightweight design is carried out, which realizes the micro-deformation design and manufacturing. Engineering analysis and experiment is carried out to further proved the performance of main flange. The results show that the micro-deformation of SiC/Al main flange is 9μm, thermo stability is 0.05″/℃, first order frequency is 160Hz, and the stress in flexible unit is 76MPa. This method eliminates the low-frequency drift and high-frequency disturbance of the response curves. |
Key words: ultra-high star tracker;main flange;SiC/Al;micro-deformation |