title: MEMS Inertial Sensors-Based Multi-Loop Control Enhanced by Disturbance Observation and Compensation for Fast Steering Mirror System.
abstract: In this paper, an approach to improve the disturbance suppression performance of a fast steering mirror (FSM) tracking control system based on a charge-coupled device (CCD) and micro-electro-mechanical system (MEMS) inertial sensors is proposed. The disturbance observation and compensation (DOC) control method is recommended to enhance the classical multi-loop feedback control (MFC) for line-of-sight (LOS) stabilization in the FSM system. MEMS accelerometers and gyroscopes have been used in the FSM system tentatively to implement MFC instead of fiber-optic gyroscopes (FOG) because of its smaller, lighter, cheaper features and gradually improved performance. However, the stabilization performance of FSM is still suffering a large number of mechanical resonances and time delay induced by a low CCD sampling rate, which causes insufficient error attenuation when suffering uncertain disturbances. Thus, in order to make further improvements on the stabilization performance, a cascaded MFC enhanced by DOC method is proposed. The sensitivity of this method shows the significant improvement of the conventional MFC system. Simultaneously, the analysis of stabilization accuracy is also presented. A series of comparative experimental results demonstrate the disturbance suppression performance of the FSM control system based on the MEMS inertial sensors can be effectively improved by the proposed approach.
authors.affiliation: Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China. chaosir1991@gmail.com.|Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China. chaosir1991@gmail.com.|University of Chinese Academy of Science, Beijing 100039, China. chaosir1991@gmail.com.
authors.forename: Chao
authors.initials: C
authors.lastname: Deng
authors.affiliation: Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China. maoyao@ioe.ac.cn.|Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China. maoyao@ioe.ac.cn.
authors.forename: Yao
authors.initials: Y
authors.lastname: Mao
authors.affiliation: Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China. renge@ioe.ac.cn.|Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China. renge@ioe.ac.cn.
authors.forename: Ge
authors.initials: G
authors.lastname: Ren
keywords: MEMS inertial sensors; disturbance observation and compensation; light of sight stabilization; multi-loop feedback control