ABSTRACT To improve the current decoupling performance and dynamic torque output of a permanent magnet synchronous motor (PMSM), a current decoupling control strategy combining a nonsingular integral terminal sliding mode controller (NITSMC) and an adaptive extended state observer (AESO) is proposed. Firstly, a nonsingular integral terminal sliding mode surface and a continuous convergence law are designed to boost the current decoupling performance of the sliding mode controller (SMC). Next, the extended state observer (ESO) is employed to monitor the perturbations and compensate for the input signal. To implement AESO, the dq ‐axis inductance of the PMSM is estimated in real‐time and fed into the ESO to enhance the tracking and observing performance of the observer. Moreover, a dynamic forgetting and adaptive regular factor strategy is used to refine the recursive least squares method with forgetting factor (FF‐RLS) to raise the convergence accuracy and speed of parameter estimation, named DFARF‐RLS. By combining NITSMC with AESO, dynamic decoupling of currents and antijamming control are realized. Finally, the effectiveness of the proposed scheme is verified by simulation and experiment.
Cao et al. (Sat,) studied this question.