Systems Engineering and Electronics ›› 2019, Vol. 41 ›› Issue (12): 2827-2834.doi: 10.3969/j.issn.1001-506X.2019.12.22

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Composite compensation method to improve the image registration based on MSCMG

SHU Shi1,2,3,4, FANG Jiancheng1,2,3, ZHANG Wei4, LIU Gang1,2,3, QIAN Yong4, ZHANG Jian4, CUI Peiling1,2,3   

  1. 1. School of Instrument Science and Opto-electronics Engineering, Beiing University of Aeronautics and Astronautics, Beijing 100191, China; 2. Novel Inertial Instrument & Navigation System Technology Key Laboratory of Fundamental Science for National Defense, Beijing 100191, China; 3. Inertial Technology Key Laboratory, Beijing 100191, China; 4. Shanghai Institute of Satellite Engineering, Shanghai, 200240, China
  • Online:2019-11-25 Published:2019-11-26

Abstract:

Focusing on improving image registration precision of the high precise remote sensing satellite due to the camera motion disturbance. The composite compensation method to improve the image registration based on magnetically suspended control moment gyros (MSCMG) is proposed. Firstly, the traditional attitude feedback control system avoiding the complexity of the feed forward control method and its disturbance is used in terms of MSCMG actuators, and the control attitude precision of to 5.8×10-5 (°)/s can be achieved. Then, the integration compensation method is put forward according to attitude control and camera pointing control in order to compensate the attitude residual error due to the constriction of the control band width of the control system. Finally, the simulation is done and the results show that not only the precision of elevation is improved from 6 μrad before compensated to 0.36 μrad after compensated, but also the precision of the scanning angle enhances as well from 0.6 μrad to 0.45 μrad, which boosts the pointing stability of bore sight evidently. Research results can be used as a reference for image registration design for the very high precised remote sensing satellites.

Key words: magnetically suspended control moment gyros, attitude control, bore-sight pointing, composite compensation control, image registration

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