85 / 2025-04-08 14:47:57

Finite Frequency H-/L∞ Fault Detection for Demagnetized Permanent Magnet Synchronous Machine via Interval LPV Observer Approach

permanent magnet synchronous machine,demagnetization,linear parameter varying systems,fault detection,finite frequency H-/L∞ performance

In this paper, a novel interval-observer-based fault detection method is proposed for a class of permanent magnet synchronous machines (PMSMs) with demagnetization faults. The linear parameter varying modeling and observer design

schemes are developed to address the fault detection issue for demagnetized PMSMs. According to the characteristics of demagnetization faults, an interval-observer-based fault detection filter is designed to generate dynamic residuals, and the finite frequency H-/L∞ performance criteria are established to improve the sensitivity for a specified fault frequency and the robustness against bounded disturbances. By using the parameterdependent Lyapunov function approach, sufficient conditions are presented ensuring that the corresponding error systems are cooperative and the generated residuals are sensitive to faults while robust against measurement noises. Finally, the motor-to-towing experimental platform with 5.5-KW surface-mount demagnetized PMSMs is constructed to validate the applicability and effectiveness of the presented approach.