Fast Terminal Sliding Mode Control of Precision Linear Motor Trajectory Tracking System

A fast terminal sliding mode control algorithm is proposed to improve the trajectory tracking performance of an ironless permanent magnet linear synchronous motor system.The control law is designed based on the motor system dynamic model.The control stability and robustness are proved and analyzed.The system state is guaranteed to have a faster convergence speed around the equilibrium neighborhood using the proposed control technique,and can converge to the equilibrium eventually.If choosing suitable values of the control parameters are chosen,a high accuracy of the system can be achieved.Furthermore,the chattering is avoidable since the continuous control method.Computer simulation results show that the proposed control scheme can achieve better tracking performance and robustness compared with other control algorithm.