Title: Active control of vehicle active suspension with preview, using a variable structure model reference adaptive controller

Authors: Ardeshir Karami mohammadi

Addresses: Department of Mechanical Engineering, Shahrood University of Technology, Shahrood, Iran

Abstract: A Variable Structure Model Reference Adaptive Controller (VS-MRAC) is proposed for the active control of vehicle suspension with preview. A two DOF quarter car model has been considered. The reference model is also a two DOF vibrating system with a skyhook damper. The structure of the switching functions is designed, based on global exponential stability requirements, and shows perfect model following at a finite time. Sliding surfaces are independent of system parameters and, therefore, VS-MRAC is insensitive to system parameter variations. Simulation is presented for some road irregularities, and compares to active suspension with fixed structure MRAC, and passive suspension. VS-MRAC shows the best performance on ride and working space.

Keywords: active suspension; adaptive control preview; model reference; variable structure control; Model Reference Adaptive Controller; MRAC; vehicle suspension; quarter car model; skyhook dampers; simulation.

DOI: 10.1504/IJVAS.2005.008236

International Journal of Vehicle Autonomous Systems, 2005 Vol.3 No.2/3/4, pp.253 - 264

Available online: 25 Nov 2005 *

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