Design and Test of The Space Camera Support Structure with Random Vibration Response

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (10) : 232-236.

LI Lin 1,2 WANG Dong 1,3 KONG Lin 1,3 TAN Lu-yang1,2 YANG Hong-bo1

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Abstract

In order to solve the problem of random vibration acceleration response of a high resolution space camera, the main support structure of the space camera has been optimal designed. First, the mathematical model is established based on random vibration response, and random vibration root-mean-square response expression is deduced. Then, the camera supporting structure is designed based on the principle of the three point location principle and bipod flexible structure. Adopting the method of size optimization, which directed by objective function of acceleration response RMS and in the meanwhile restricted by the natural frequency. The position of the flexible link is optimized. Using MSC.Patran & Nastran to analysis the support structure, the result show that the camera installation point random response RMS value less than 19.6grms. Finally, the camera support structure is tested with the random vibration test. Obtained results show that the maximum relative error of the Random vibration response between analysis result and test result is 8.2%.The performance parameters of the main support structure meet the requirements of space camera well, which has verified the feasibility of the optimization method.

Key words

Space Camera / supporting structure / random vibration response / Topology optimization / power spectral density

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LI Lin 1,2 WANG Dong 1,3 KONG Lin 1,3 TAN Lu-yang1,2 YANG Hong-bo1. Design and Test of The Space Camera Support Structure with Random Vibration Response[J]. Journal of Vibration and Shock, 2017, 36(10): 232-236

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