Laser displacement sensor optimization for space structure vacuum thermal test

Chao Fan; Wen Gao; Yanqiang Bi; Jing Wang; Boying Lin; Xiyuan Li; Guoqing Liu

doi:10.1117/12.2542949

12 March 2020 Laser displacement sensor optimization for space structure vacuum thermal test

Chao Fan, Wen Gao, Yanqiang Bi, Jing Wang, Boying Lin, Xiyuan Li, Guoqing Liu

Proceedings Volume 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 114390L (2020) https://doi.org/10.1117/12.2542949
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China

Abstract

The large spacecraft structure would generate thermal-induced vibration in orbit under specific condition, which will affect the performance of the payload. In order to predict the occurrence of thermal-induced vibration of the spacecraft structure in orbit, it is necessary to carry out tests in the ground simulated vacuum and low temperature environment. The vibration displacement of structure should be measured by laser displacement meter during the test. Due to the special environment such as vacuum, low temperature environment, it is necessary to improve the laser displacement meter. The effect of internal and external pressure difference during pumping is eliminated by design the venting holes. Ensures the temperature uniformity and operating temperature range of the laser displacement meter by thermal control design, to reduce the measurement error caused by the thermal deformation of the sensor. The adaptive design ensures that the laser displacement meter can work normally under vacuum and low temperature environment, and the measurement accuracy is better than 5μm.

Citation Download Citation

Chao Fan, Wen Gao, Yanqiang Bi, Jing Wang, Boying Lin, Xiyuan Li, and Guoqing Liu "Laser displacement sensor optimization for space structure vacuum thermal test", Proc. SPIE 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 114390L (12 March 2020); https://doi.org/10.1117/12.2542949

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