Research on Radar Servo System Based On Disturbance Observer Sliding Mode Control

Abstract

Radar turntable servo system has strong friction at low speed, and the traditional PID control method due to its fixed parameters, poor stability and low control accuracy, is difficult to meet the high requirements of modern radar servo system for control quality. In this paper, a sliding mode controller with disturbance observer is proposed for the radar servo system. The friction is estimated by the exponential convergence disturbance observer; meanwhile the exponential approach law sliding mode controller is also designed. The simulation results show that the radar servo system controlled by sliding mode disturbance observer is better than the traditional PID controlled system. It can overcome the friction at low speed and improve the response speed and control accuracy of the radar servo system.