Adaptive control of precision voice coil actuator fast steering mirror for wide temperature range

In order to solve the problem of unstable and inconsistent performance of precision voice coil actuator (VCA) fast steering mirror (FSM) in the control of high-precision application under wide temperature range, the temperature-segmented proportion-integration-differentiation (PID) adaptive control method was adopted. The working principle and temperature characteristics of the fast mirror were analyzed, after accessing the temperature sensor, temperature-segmented PID control parameter table was obtained by parameter identification. The experimental environment was built for step and bandwidth testing. The results show that, in the wide temperature range from −40 ℃ to 60 ℃, the temperature-segmented PID adaptive control method improves the system step time by more than 27%, and the bandwidth is improved by more than 40% in the high temperature environment compared with ordinary PID. This method can effectively improve the step response and bandwidth capability of the FSM in a wide temperature domain, which provides a reference for the stability and consistency control of the FSM in a wide temperature domain.