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Shock and Vibration
Volume 2015, Article ID 163694, 17 pages
http://dx.doi.org/10.1155/2015/163694
Research Article

Adaptive Vibration Control System for MR Damper Faults

Tecnológico de Monterrey, Escuela de Ingeniería y Ciencias, Avenida Garza Sada No. 2501, 64849 Monterrey, NL, Mexico

Received 30 January 2015; Revised 29 April 2015; Accepted 4 May 2015

Academic Editor: Miao Yu

Copyright © 2015 Juan C. Tudón-Martínez and Ruben Morales-Menendez. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Several methods have been proposed to estimate the force of a semiactive damper, particularly of a magnetorheological damper because of its importance in automotive and civil engineering. Usually, all models have been proposed assuming experimental data in nominal operating conditions and some of them are estimated for control purposes. Because dampers are prone to fail, fault estimation is useful to design adaptive vibration controllers to accommodate the malfunction in the suspension system. This paper deals with the diagnosis and estimation of faults in an automotive magnetorheological damper. A robust LPV observer is proposed to estimate the lack of force caused by a damper leakage in a vehicle corner. Once the faulty damper is isolated in the vehicle and the fault is estimated, an Adaptive Vibration Control System is proposed to reduce the fault effect using compensation forces from the remaining healthy dampers. To fulfill the semiactive damper constraints in the fault adaptation, an LPV controller is designed for vehicle comfort and road holding. Simulation results show that the fault observer has good performance with robustness to noise and road disturbances and the proposed AVCS improves the comfort up to 24% with respect to a controlled suspension without fault tolerance features.