Design and tests for a space camera support structure under random vibration responses
LI Lin1,2,WANG Dong1,3,KONG Lin1,3,TAN Luyang1,2,YANG Hongbo1
1.Changchun Institute of Optics,Fine Machinery and Physics,University of Chinese Academy of Sciences,Changchun 130033,China;
2.University of Chinese Academy of Sciences,Beijing 100039,China;
3.Chang Guang Satellite Technology Ltd.,Changchun 130033,China
In order to solve the problem of too large random vibration acceleration response of a high resolution space camera,the main support structure of the space camera was designed optimally.Firstly,the mechanical model was established based on the random vibration response analysis,and the random vibration root-mean-square response expression was deduced.Then,the camera supporting structure was designed based on the principles of the three-point locationing and the bipod flexible structure.With an objective function of minimizing the acceleration response RMS of the installing point of the camera and the fundamental natural frequency of the structure as a constraint,the optimal model for the random vibration response fo the camera support structure was built.The position of its flexible link was optimized.Using the FE software MSC.Patran & Nastran,the engineering analysis was done for the optimized camera support structure.The results showed that the maximum camera installation point random acceleration response RMS value is 19.6 grms.Finally,the camera support structure was tested with random vibration tests.The results showed that the maximum relative error between analysis results and test results is 8.2%; the designed camera support structure can meet the service requirements of the space camera,the feasibility of the proposed optimization method is verified.
李林1，2， 王栋1,3，孔林1,3，谭陆洋1,2，杨洪波1. 随机振动响应下空间相机支撑结构设计与试验[J]. 振动与冲击, 2017, 36(7): 208-212.
LI Lin1,2,WANG Dong1,3,KONG Lin1,3,TAN Luyang1,2,YANG Hongbo1. Design and tests for a space camera support structure under random vibration responses. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(7): 208-212.
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