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This study is a further research based on previous published papers focusing on hydraulic leakage fault detection and isolation. The authors have verified the effectiveness of a FDI scheme based on extended Kalman filter (EKF) for the change of supply pressure (An and Sepehri, 2003). A completed FDI scheme (An and Sepehri, 2005) was also proposed by the authors focusing on various actuator leakages...
This paper presents the application of extended Kalman filter (EKF) towards leakage fault identification in a servo-hydraulic actuation system. The EKF rebuilds information about the system's states based on the input signal and measurements of the actuator displacement and cylinder chamber pressures. By comparing the estimated states with the measured ones, residual signals are generated. When faults...
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