Micro-vibration test and imaging analysis during space camera thermal-optical test

Wenji She; Kai Cui; Xiong Gao; Shuxiu Li; Huan Wang; Wei Yang

doi:10.1117/12.2543762

18 December 2019 Micro-vibration test and imaging analysis during space camera thermal-optical test

Wenji She, Kai Cui, Xiong Gao, Shuxiu Li, Huan Wang, Wei Yang

Proceedings Volume 11341, AOPC 2019: Space Optics, Telescopes, and Instrumentation; 1134114 (2019) https://doi.org/10.1117/12.2543762
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

The high resolution space optical camera imaging quality was sensitive to micro-vibration both in space and on the ground test. When performing the thermal-optical test within a vacuum tank, the affiliated air compressor pump, the turbo molecular pump and other pump assembles may cause micro-vibration transmitting to the payload. Firstly, the threshold and frequency bandwidth of the camera mounting flange micro-vibration were calculated based on the cameral optics and structure rigid-body theory. Secondly, three linear accelerometers were used for micro-vibration signals acquiring, and the identification plate was used for imaging. The signals and photos were acquired at the same time during the pumps turned on and turned off separately. Finally, the vibration caused by the pump assembles were analyzed after the thermal-optical experiment process, together with the images’ MTF. It’s shown that even the vacuum tank was isolated on the ground, the affiliated s’ micro-vibration ed to the inside payload, causing a previous vibration The STD of Z axis micro-vibration signal more than 3 times from 2.1mg to 9.5mg, Exceeding the analysised threshold from 9Hz to 16Hz and near the 146Hz, the peak vealue was about 3 times of the threshold at 13 Hz, while the MTF declined little, just about 2.5%.

Citation Download Citation

Wenji She, Kai Cui, Xiong Gao, Shuxiu Li, Huan Wang, and Wei Yang "Micro-vibration test and imaging analysis during space camera thermal-optical test", Proc. SPIE 11341, AOPC 2019: Space Optics, Telescopes, and Instrumentation, 1134114 (18 December 2019); https://doi.org/10.1117/12.2543762

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