Enhanced Active Disturbance Rejection Control With Measurement Noise Suppression for PMSM Drives via Augmented Nonlinear Extended State Observer

Owing to the satisfactory disturbance estimation and compensation capacity, active disturbance rejection control (ADRC) is promising for permanent magnet synchronous motor (PMSM) speed regulation system. Unfortunately, the control performance of ADRC strategy is generally affected by the measurement noise introduced by position sensors. To address this tough issue, an augmented nonlinear extended state observer (ANESO) is constructed in this paper to directly estimate the motor speed. The bode diagrams of the ANESO-based measurement noise suppression approach acquired by the frequency-sweep method are illustrated to show its frequency domain characteristics. Utilizing the advantages of nonlinear control and augmented observer technique, the proposed scheme can obtain satisfactory measurement noise suppression performance without sacrificing the robustness of the PMSM system. Experimental verifications are conducted to verify the superior properties of the proposed measurement noise suppression strategy.