Title: Proportional-integral sliding mode control of a hydraulically actuated active suspension system: force tracking and disturbance rejection control on non-linear quarter car model

Authors: Y.M. Sam, K. Hudha, J.H.S. Osman

Addresses: Faculty of Electrical Engineering, University Technology of Malaysia, 81310 UTM Skudai, Johor, Malaysia. ' Department of Automotive Engineering, Faculty of Mechanical Engineering, Universiti Teknikal Malaysia Melaka, Karung Berkunci 1200, Ayer Keroh, 75450 Melaka, Malaysia. ' Faculty of Electrical Engineering, University Technology of Malaysia, 81310 UTM Skudai, Johor, Malaysia

Abstract: This paper deals with a robust strategy for controlling a hydraulically actuated active suspension system for a quarter car model. The system consists of an inner loop for force tracking control of the hydraulic actuator and an outer loop controller to reject the effects of road induced disturbances. The Proportional Integral Sliding Mode Control (PISMC) scheme is proposed for the outer loop and the Proportional Integral (PI) control is utilised for the inner loop. The performance of the proposed controller is compared to the LQR controller and the passive suspension system through computer simulations.

Keywords: force tracking control; nonlinear quarter car model; PI sliding mode control; hydraulic actuators; disturbance rejection; active suspension systems; vehicle suspension; road disturbances; simulation.

DOI: 10.1504/IJVSMT.2007.017121

International Journal of Vehicle Systems Modelling and Testing, 2007 Vol.2 No.4, pp.391 - 410

Published online: 14 Feb 2008 *

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