System Identification and Tracking, Antidisturbance Composite Control Technology of Voice Coil Actuator Fast Steering Mirror

This article proposes a comprehensive approach to achieve high-precision modeling, high band-width, and robust control for the voice coil actuator fast steering mirror (VCA-FSM). This approach includes the Hankel matrix identification method ,H(infinity )sensitivity control, disturbance observer (DOB), and zero phase error tracking control (ZPETC) algorithms .The superiority and practicality of the proposed control techniques are discussed by comparing control methods, such as H-infinity, sliding mode control (SMC),linear-quadratic-regulator (LQR), and proportional-integral-derivative (PID) through experiments. Especially, this proposed method serves as a good guide for controller designs of other servo mechanisms.