Abstract
Due to internal parameters of the permanent magnet synchronous motor (PMSM) change, the precision and robustness of the PMSM will decrease, a Super-twisting sliding mode control strategy based on predictive adaptive law is proposed to solve the above problems. Firstly, a Super-twisting sliding mode controller is designed to replace the traditional PI controller, and its high-order performance can effectively reduce the chattering of the system and the influence of the observation error. Meanwhile, a predictive adaptive law is designed to eliminate the influence of uncertainties and to suppress the speed fluctuation, to improve the anti-disturbance ability of the system. The convergence and robustness of the designed strategy are proved by Lyapunov. Finally, the simulation results showed that the novel Super-twisting sliding mode controller could track the speed command quickly and accurately, and had a better dynamic response and stronger anti-disturbance ability compared with the traditional controller. The accuracy and robustness of PMSM are effectively improved. This control strategy is feasible and effective.
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