Document Type

Article

Publication Date

2-2018

DOI

10.1016/j.cja.2018.01.026

Publication Title

Chinese Journal of Aeronautics

Volume

31

Issue

5

Pages

965-975

Abstract

This paper presents a Fault Mode Probability Factor (FMPF) based Fault-Tolerant Control (FTC) strategy for multiple faults of Dissimilar Redundant Actuation System (DRAS) composed of Hydraulic Actuator (HA) and Electro-Hydrostatic Actuator (EHA). The long-term service and severe working conditions can result in multiple gradual faults which can ultimately degrade the system performance, resulting in the system model drift into the fault state characterized with parameter uncertainty. The paper proposes to address this problem by using the historical statistics of the multiple gradual faults and the proposed FMPF to amend the system model with parameter uncertainty. To balance the system model precision and computation time, a Moving Window (MW) method is used to determine the applied historical statistics. The FMPF based FTC strategy is developed for the amended system model where the system estimation and Linear Quadratic Regulator (LQR) are updated at the end of system sampling period. The simulations of DRAS system subjected to multiple faults have been performed and the results indicate the effectiveness of the proposed approach.

Comments

This is an open access article under the CCBY-NC-ND license.

(C) 2018 Chinese Society of Aeronautics and Astronautics.

Original Publication Citation

Wang, J., Wang, S. P., Wang, X. J., Tomovic, M. M., & Shi, C. (2018). Fault mode probability factor based fault-tolerant control for dissimilar redundant actuation system. Chinese Journal of Aeronautics, 31(5), 965-975. doi:10.1016/j.cja.2018.01.026

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