The focus of preventive maintenance (PM) programmes in industry isshifting from a pure
statistical basis to online condition monitoring. Examines the shortcomings of statistical …

This paper describes the application of wavelet transform (WT) to detect internal leakage in
hydraulic actuators, caused by seal damage. The method analyzes the pressure signal at …

This paper presents the application of extended Kalman filter (EKF) in order to identify
leakage faults in hydraulically powered actuators. A hydraulic actuator can suffer from two …

Testing fault tolerant control and diagnosis systems for hydraulic actuators under operating
conditions that closely resemble the intended application is an important part of control …

In this paper, the application of wavelet transform to detect external leakage fault in hydraulic
actuators is described. This paper also examines the isolation of this fault from actuator …

This paper describes the design and experimental evaluation of a fault-tolerant controller
(FTC) for an electrohydraulic servo positioning system. The controller is required to retain …

A novel model-based methodology for fault diagnosis (FD) of nonlinear hydraulic drive
systems is presented in this paper. Due to its linear dependence upon parameters, a second …

From the Publisher: Modern Control Systems Using MATLAB & SIMULINK by Robert H.
Bishop is a mid-edition supplement to the leading controls text on the market, Modern …

Actuator systems are employed widely in aerospace, transportation and industrial processes
to provide power to critical loads, such as aircraft control surfaces. They must operate …

Internal leakage is a typical fault in the hydraulic systems, which may be caused by seal
damage, and result in deteriorated performance of the system. To study this issue, this article …