Analysis and verification of structure stability and thermal stability of a bracket of star sensors

Jiang Fan; Wu Qingwen; Wang Zhongsu; Miao Jianyu; Guo Liang; Chen Liheng; Yang Xianwei

To verify the effect on accuracy of star sensors by deformation of the bracket of star sensors in space, structure stability and thermal stability of the bracket were investigated. Structural properties of the bracket were analyzed by FEM and then the temperature data in worst case on orbit were mapped to the structure model. Based on the temperature data, the thermal deformation of bracket was figured out and vectors of optic axes of star sensors were obtained by least square method. Finally experiment was conducted to verify the analysis. Results indicated that fundamental frequency of star sensors and the bracket was 429 Hz with the difference less than 2% from the analysis and the max variety of the optical axes after vibration test was no more than 5. The max temperature change of the bracket in orbit was less than 2 ℃ and the max variety of the optical axes was about 4-5 which was similar to the analysis. Both the ground test data and orbit data demonstrate that the bracket of star sensors has good structure stability and thermal stability which can meet the requirement.

1. Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;

2. University of Chinese Academy of Sciences,Beijing 100049,China

Received Date: 2015-03-15

Rev Recd Date: 2015-04-21

Publish Date: 2015-11-25

Key words:

Abstract: To verify the effect on accuracy of star sensors by deformation of the bracket of star sensors in space, structure stability and thermal stability of the bracket were investigated. Structural properties of the bracket were analyzed by FEM and then the temperature data in worst case on orbit were mapped to the structure model. Based on the temperature data, the thermal deformation of bracket was figured out and vectors of optic axes of star sensors were obtained by least square method. Finally experiment was conducted to verify the analysis. Results indicated that fundamental frequency of star sensors and the bracket was 429 Hz with the difference less than 2% from the analysis and the max variety of the optical axes after vibration test was no more than 5. The max temperature change of the bracket in orbit was less than 2 ℃ and the max variety of the optical axes was about 4-5 which was similar to the analysis. Both the ground test data and orbit data demonstrate that the bracket of star sensors has good structure stability and thermal stability which can meet the requirement.

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Reference (12)

[1]	Wang Cunen, Guo Ruiying. CCD star sensor and the application in spacecrafts[J]. Infrared and Laser Engineering, 1991, 20(5): 30-34. (in Chinese) 王存恩, 过瑞英. 当前CCD星敏感器及其在航天中的应用[J]. 红外与激光工程, 1991, 20(5): 30-34.
[2]	Li Jie. Study on key technique of APS star sensor[D]. Beijing: University of Chinese Academy of Sciences, 2005. (in Chinese) 李杰. APS星敏感器关键技术的研究[D]. 北京: 中国科学院大学, 2005.
[3]	Wei Xinguo, Zhang Guangjun, Fan Qiaoyun, et al. Ground function test method of star sensor using simulated sky image[J]. Infrared and Laser Engineering, 2008, 37(6): 1087- 1091. (in Chinese) 魏新国, 张广军, 樊巧云, 等. 利用仿真星图的星敏感器地面功能测试方法[J]. 红外与激光工程, 2008, 37(6): 1087-1091.
[4]	Jorgensen J, Liebe C. The advanced stellar compass, development and operations[J]. Acta Astronautica, 1996(11):775-783.
[5]	Fang Jiancheng, Ning Xiaolin, Tian Yulong. Spacecraft Autonomic Celestial Navigation Theory and Application [M]. Beijing: Beihang University Press, 2006. (in Chinese)房建成, 宁晓琳, 田玉龙. 航天器自主天文导航理论与方法[M]. 北京: 北京航空航天大学出版社, 2006.
[6]	Liu Lei, Zhang Lu, Zheng Xin, et al. Current situation and development trends of star sensor technology[J]. Infrared and Laser Engineering, 2007, 36(9): 2529-533. (in Chinese) 刘垒, 张路, 郑辛, 等. 星敏感器技术研究现状及发展趋势[J]. 红外与激光工程, 2007, 36(9): 529-533.
[7]	Wang Haiming, Zhao Hua, Yang Wentao. Mechanical analysis of a star sensor's support of ZY-1 [J]. Spacecraft Environment Engineering, 2007, 6: 168-173. (in Chinese) 王海明, 赵华, 杨文涛. 资源一号卫星某星敏支架力学性能分析[J]. 航天器环境工程, 2007, 6: 168-173.
[8]	Wang Zhen, Wei Xinguo, Zhang Guangjun. Structure optimization for multi-FOV star sensors[J]. Infrared and Laser Engineering, 2011, 40(12): 2469-2473. (in Chinese) 王真, 魏新国, 张广军. 多视场星敏感器结构布局优化[J].红外与激光工程, 2011, 40(12): 2469-2473.
[9]	Zhang Lijun. Spacecraft attitude determination for multiple fields of view star sensors[D]. Changsha: National University of Defense Technology, 2011. (in Chinese) 张力军. 基于多视场星敏感器的航天器姿态确定方法研究[D]. 长沙: 国防科技大学, 2011.
[10]	Jiang Fan, Wang Zhongsu, Wu Qingwen, et al. Thermal design of star sensor assembly[J]. Infrared and Laser Engineering, 2014, 43(11): 3740-3745. (in Chinese) 江帆, 王忠素, 吴清文, 等. 星敏感器组件的热设计[J]. 红外与激光工程, 2014, 43(11): 3740-3745.
[11]	Wang Zhi, Wu Guodong. Calibration of transition matrix on cubic prisms in mapping camera and star sensor [J]. Opt Precision Eng, 2012, 20(1): 96-101. (in Chinese) 王智, 吴国栋. 测绘相机立方镜与星敏立方镜转换矩阵的标定[J]. 光学精密工程, 2012, 20(1): 96-101.
[12]	Li Jing, Wang Rong, Zhu Leiming, et al. In-flight geometric calibration for Mapping Satellite-1 surveying and mapping camera[J]. Journal of Remote Sensing, 2012, 16(S1): 35-39. (in Chinese) 李晶, 王蓉, 朱雷鸣, 等. 天绘一号卫星测绘相机在轨几何定标[J]. 遥感学报, 2012, 16(S1): 35-39.

Analysis and verification of structure stability and thermal stability of a bracket of star sensors

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