Backstepping Nonsingular Terminal Sliding Mode Control for PMSM With Finite-Time Disturbance Observer

Abstract

Aiming at the speed regulation problem of permanent magnet synchronous motor (PMSM) drives, a novel backstepping nonsingular terminal sliding mode control (BNTSMC) method with finitetime disturbance observer (FTDO) is proposed. In order to ensure excellent tracking and anti-disturbance performance, the backstepping nonsingular terminal sliding mode speed controller based on equivalent motor model and the recursive principle is designed for PMSM. The benefits of this approach are that the controller has asymptotic stability based on backstepping design, finite-time convergence, and strong robustness for the matched disturbance based on sliding mode control. Then, to further improve the antidisturbance performance, a finite-time disturbance observer is designed, and it is used to estimate the mismatched external disturbance in motor drive system. The stability of the system is also proved with Lyapunov criterion. Finally, the experimental results show that the proposed method has the advantages of fast convergence and strong robustness against parameter variations and external disturbance.INDEX TERMS PMSM drive, backstepping nonsingular terminal sliding mode control (BNTSMC), finitetime disturbance observer (FTDO).

Design and Implementation of LCL Filter-Based Electric Machine Emulator With Disturbance Compensation

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“…Indeed, (29) also specifies the direction of disturbance rejection that we can counteract u il by compensating for disturbance currents, while offsetting disturbance voltages u l to completely eliminate the errors. Various disturbance estimation and attenuation methods have been developed, such as extended state observer [31], finite-time disturbance observer [29], nonlinear disturbance observer [32]- [34], and UIO [35], [36]. For these approaches, the estimated lumped disturbances are employed for feedforward compensation control.…”

High-order Supper-twisting Based Terminal Sliding Mode Control Applied on Three Phases Permanent Synchronous Machine

“…Article [32][33][34][35] used a hybrid technique between the terminal sliding mode and backstepping control to achieve speed regulation despite uncertainties and disturbances, this latter contributed to giving a relatively robust control and stabilizing the steady state error. However, the phenomenon of chattering, overshoot and undershoot are present during the change of speed and during the application of the torque.…”

Model predictive position control of permanent magnet synchronous motor servo system with sliding mode observer

“…When the strong external disturbance occurs, the control accuracy of model predictive control will decrease. Many observer methods have been proposed to enhance the control performance of the system, such as sliding mode observer (SMO) [28], extended state observer [29], and nonlinear disturbance observer [30,31]. Through these methods, disturbance is estimated and online compensated to strengthen anti-disturbance performance of the system.…”