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An Observer-Based Active Fault Tolerant Controller for Vehicle Suspension System

School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China
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Appl. Sci. 2018, 8(12), 2568; https://doi.org/10.3390/app8122568
Received: 24 October 2018 / Revised: 30 November 2018 / Accepted: 5 December 2018 / Published: 11 December 2018
This paper proposes an observer-based active fault-tolerant controller for a half-vehicle active suspension system subjected to the actuator fault as the nonzero offset fault. By constructing the augmented fault suspension system model, an H weighted output feedback controller was developed to improve the vehicle dynamics performances under a fault-free condition. Moreover, a robust observer was designed to make an accurate estimation of the fault information with the auxiliary diagnosis system and further to develop an H fault compensation controller, such that the closed-loop control system can eliminate the negative effects of the actuator faults on vehicle suspension performances. Finally, a numerical simulation investigation was provided to verify the effectiveness of the proposed controller under the random and bump road disturbances. View Full-Text
Keywords: active suspension system; fault estimation; fault compensation; fault tolerant control active suspension system; fault estimation; fault compensation; fault tolerant control
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Liu, X.; Pang, H.; Shang, Y. An Observer-Based Active Fault Tolerant Controller for Vehicle Suspension System. Appl. Sci. 2018, 8, 2568.

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