Title: Active control of vibrations transmitted through a car suspension

Authors: Jean-Gabriel Roumy, Benoit Boulet, Dany Dionne

Addresses: Centre for Intelligent Machines, McGill University, 3480 University Street, Montreal, Quebec H3A 2A7, Canada. ' Centre for Intelligent Machines, McGill University, 3480 University Street, Montreal, Quebec H3A 2A7, Canada. ' Centre for Intelligent Machines, McGill University, 3480 University Street, Montreal, Quebec H3A 2A7, Canada

Abstract: Among the major sources of ambient noise inside the passenger compartment of an automobile are the road-induced vibrations transmitted to the frame. A reduction of these vibrations| magnitude can be achieved through the addition of feedback-controlled actuators between the suspension attachment points and the car frame. In this paper, a model of a ¼ car suspension (suspension associated to a single wheel) is derived from experimentally acquired data. The structure|s modal parameters are extracted from frequency response data, and are used to obtain a state-space realisation. The performance of controller design techniques such as LQR and H_∞ is assessed through simulation.

Keywords: controller design; H-infinity; LQR; modal analysis; noise reduction; system modelling; vibration control; active control; vehicle suspension; automotive suspension; ambient noise; road-induced vibrations; feedback control.

DOI: 10.1504/IJVAS.2004.006097

International Journal of Vehicle Autonomous Systems, 2004 Vol.2 No.3/4, pp.236 - 254

Published online: 04 Feb 2005 *

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