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Simulating and Testing Microvibrations on an Optical Satellite Using Acceleration Sensor-Based Jitter Measurements

1,2,3, 1,2,3,*, 1,2,3, 1,2,3, 1,2 and 3
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
3
Chang Guang Satellite Technology LTD, Changchun 130033, China
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(8), 1797; https://doi.org/10.3390/s19081797
Received: 19 February 2019 / Revised: 2 April 2019 / Accepted: 8 April 2019 / Published: 15 April 2019
(This article belongs to the Special Issue Aerospace Sensors and Multisensor Systems)
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Abstract

The present study uses a method to address microvibrations effects on an optical satellite by combining simulations and experiments based on high-precision acceleration sensors. The displacement and angular displacement of each optical component can be obtained by introducing flywheel perturbation data from a six-component test bench to the finite element model of the optical satellite. Combined with an optical amplification factor inferred from the linear optical model, the pixel offset of the whole optical system is calculated. A high accuracy and broad frequency range for a new microvibration measurement experimental system is established to validate the simulation. The pixel offset of the whole optical system can be measured by testing the acceleration signals of each optical component and calculating optical amplification factors. The results are consistent with optical imaging test results, indicating correctness of the experimental scheme and the effectiveness of the simulation. The results suggest that the effect of microvibrations on a camera can be verified by using mechanical simulators instead of a whole optical camera for the experiment scheme, which is demonstrated to be an effective way for increasing efficiency in jitter measurements. View Full-Text
Keywords: microvibration; optical amplification factor; acceleration sensor; jitter measurement; pixel offset microvibration; optical amplification factor; acceleration sensor; jitter measurement; pixel offset
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Chen, S.-B.; Xuan, M.; Zhang, L.; Gu, S.; Gong, X.-X.; Sun, H.-Y. Simulating and Testing Microvibrations on an Optical Satellite Using Acceleration Sensor-Based Jitter Measurements. Sensors 2019, 19, 1797.

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