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Effects of Rubber Shock Absorber on the Flywheel micro vibration in the Satellite Imaging System

Photonic Sensors 2016年第4期6卷 372-384页

作者： Changcheng DENG Deqiang MU Xuezhi JIA Zongxuan LI National & Local United Engineering Research Center of Small Satellite Technology Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China University of Chinese Academy of Sciences Beijing 100039 China Changchun University of Technology Changchun 130012 China

When a satellite is in orbit, its flywheel will generate micro vibration and affect the imaging quality of the camera. In order to reduce this effect, a rubber shock absorber is used, and a numerical model and an experimental setup are developed to investigate its effect on the micro vibration in the study. An integrated model is developed for the system, and a ray tracing method is used in the modeling. The spot coordinates and displacements of the image plane are obtained, and the modulate transfer function （MTF） of the system is calculated. A satellite including a rubber shock absorber is designed, and the experiments are carried out. Both simulation and experiments results show that the MTF increases almost 10 %, suggesting the rubber shock absorber is useful to decrease the flywheel vibration.

关键词： micro vibration flywheel rubber shock absorber integrated modeling MTF isolation experiment

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Reducing the negative effects of flywheel disturbance on space camera image quality using the vibration isolation method

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Frontiers of Optoelectronics 2017年第1期10卷 80-88页

作者： Changcheng DENG Deqiang MU Junli GUO Peng XIE Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China University of Chinese Academy of Sciences Beijing 100039 China Changehun University of Technology Changeh-un-130012 China

Although the performance of space cameras has largely improved, the micro vibration from flywheel disturbances still significantly affects the image quality of these cameras. This study adopted a passive isolation method to reduce the negative effect of flywheel disturbance on image quality. A metal-rubber shock absorber was designed and installed in a real satellite. A finite element model of an entire satellite was constructed, and a transient analysis was conducted afterward. The change in the modulate transfer function was detected using ray tracing and optical transfer function formulas. Experiments based on real products were performed to validate the influence of the metal-rubber shock absorber. The experimental results confirmed the simulation results by showing that the negative effects of flywheel dis- turbance on the image quality of space cameras can be diminished significantly using the vibration isolation method.

关键词： micro vibration modulate transfer function,vibration isolation flywheel disturbance

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