Design of sliding mode variable structure servo driver based on hardware

Abstract

Based on sliding mode control theory, in this paper a control method of tension control system in printing machine is presented. Firstly, a sliding mode controller for decreasing steady-state error is designed based on the servo motor model in the tension control system of printing machine, and the simulation verification is carried out in the MATLAB/Simulink. Further the hardware circuit is implemented through the design of operational amplifier to reduce the chattering of the system, and the trapezoidal wave is served as the input signal to reduce the overshoot of printing machine generated at the moment of start and stop, ensuring the smooth start and stop of the system. With the simulation results and the experimental results being consistent, it illustrates the correctness and practicality of the proposed method.