Research on Precision Tracking on Fast Steering Mirror and Control Strategy

2017 International Conference on Power and Energy Engineering

Di, Lin^1,2 ; Yi-Ming, Wu^1 ; Fan, Zhu^1

Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 710119, China^1

University of Chinese Academy of Sciences, Beijing

100049, China^2

关键词: Auto disturbance rejection control;    Control strategies;    Fast steering mirror;    High frequency HF;    Precision tracking;    Tracking accuracy;    Trajectory tracking;    Voice coil motors;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/114/1/012009/pdf
DOI  :  10.1088/1755-1315/114/1/012009

来源: IOP

【 摘 要 】

Fast steering mirror is a device used for controlling the beam direction precisely. Due to the short travel of the push-pull FSM, a compound fast steering mirror system driven by both limited-angle voice coil motor and push-pull FSM together is proposed. In the compound FSM system, limited-angle voice coil motor quickly swings at wide angle, while the push-pull FSM do high frequency movement in a small range, which provides the system with the high bandwidth and long travel. In the control strategy, the method of combining feed-forward control in Kalman filtering with auto-disturbance rejection control is used to improve trajectory tracking accuracy. The simulation result shows that tracking accuracy measured by the compound method can be improved by more than 5 times than that of the conventional PID.