Abstract：In order to solve the problem that the position tracking accuracy of permanent magnet linear synchronous motor (PMLSM) servo system is affected by periodic disturbance, parameters change, friction and other uncertain factors, an iterative super-twisting sliding mode control method is proposed. The super-twisting sliding mode control is used to restrain the influence of uncertain factors and enhance the robustness of the system. Iterative learning is used to compensate periodic disturbance and a new learning law is adopted to reduce chattering. Based on Lyapunov stability theory, the stability of the control system is analyzed and proved. Simulation results show that the proposed control method can improve the robustness and improve position tracking accuracy of PMLSM servo system.
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2022, Vol. 23 
