Sliding Model Control of Servo Turntable Based on New Approaching Law

Abstract

For servo turntable system, there exists non-linear factors to affect the control performance of the system, such as friction torque, dead zone of components, fluctuation of motor torque and other non-linear factors and uncertain factors. In this paper, servo turntable system using DC torque motor is designed to improve the tracking accuracy, speed and anti-interference ability of servo turntable. Firstly, a sliding mode control algorithm is proposed based on a new approaching law, combining the traditional power approaching law and exponential approaching law. Secondly, based on the sliding mode control algorithm, a robust control strategy is proposed. Finally, the stability of the designed controller is proved by Lyapunov theory, and the performance of the proposed control strategy is verified by simulation.