Modeling and simulation of the control system for the plane mirror rotating interferometer

Abstract

To solve the problem of optical path difference velocity (OPDV) stability in the Fourier spectrometer, a Cerebellar Model Articulation Controller-Proportional-Integral-Derivative (CMAC-PID) composite control strategy is proposed. The relationship between the angular velocity of the rotary-type voice coil motor (RT-VCM) and the OPDV was studied, along with a mathematical model of the parallel rotating mirror interferometer system. CMAC-PID is designed and simulated on this basis to suppress the disturbance of nonlinear factors in the system model. The simulation results demonstrate that the steady-state fluctuation error of the CMAC-PID controller is 90.1% less than that of the PID controller. The experimental results indicate that compared to the PID controller, the CMAC-PID controller improves the stability of the OPDV by 1.25%, which means that time-varying disturbances are effectively suppressed.