Disturbance observer based composite speed controller design for PMSM system with mismatched disturbances. (June 2016)

• Record Type: Journal Article
• Authors: Yi, Yang; Sun, Xiaokang; Li, Xiali; Fan, Xiangxiang
• Other Names: Yang Jun guest-editor.; Chen Wen-Hua guest-editor.; Ding Zhengtao guest-editor.
• Is Part Of: Transactions of the Institute of Measurement and Control. Volume 38:Number 6(2016)
• Page Start: 742
• Page End: 750
• Publication Date: 2016-06
• Subjects: Permanent magnet synchronous motor -- disturbance observer -- speed control -- mismatched disturbances -- convex optimisation algorithm; Automatic control -- Periodicals; Measuring instruments -- Periodicals; Commande automatique -- Périodiques; Mesure -- Instruments -- Périodiques; 681.2
• DOI: 10.1177/0142331215615940
• Languages: English
• ISSNs: 0142-3312

Abstract

This paper investigates a novel anti-disturbance speed tracking control problem for permanent magnet synchronous motor (PMSM) systems with unknown mismatched disturbances. In order to realise the rejection and compensation for load torque, a cascaded PMSM system is constructed by using a coordinate transformation such that the load disturbances become matched with respect to the virtual control input. By combining disturbance observer with proportional-integral feedback control structure, a composite speed controller is proposed on this basis to ensure the PMSM system stability, and convergence of the tracking error of angular velocity to zero. The favourable observation performance for the load torque and its derivative can also be achieved simultaneously. Meanwhile, theL 1 performance index is used to further optimise the robustness of the PMSM system. Finally, the effectiveness of the proposed control scheme is verified by simulations for the PMSM system with monotonous disturbances and harmonic disturbances respectively.