Finite Element Modeling and Semiactive Control of Vibrations in Road Vehicles

[+] Author and Article Information
Y. A. Khulief

Department of Mechanical Engineering, University of Alabama in Birmingham, Birmingham, AL 35294

S. P. Sun

Department of Mechanical Engineering, Auburn University, Auburn, AL 36830

J. Dyn. Sys., Meas., Control 111(3), 521-527 (Sep 01, 1989) (7 pages) doi:10.1115/1.3153083 History: Received March 22, 1987; Revised September 06, 1988; Online July 21, 2009


Control of vibrations in lightweight road vehicle systems has placed increasingly higher demands on the technology required to accurately model and predict dynamic response of a vehicle system. In this paper, a method for modeling vehicles as systems of interconnected rigid and flexible bodies is presented. Finite element and component mode substitution techniques are employed to characterize elastic motions of flexible bodies in terms of minimal set of modal coordinates. Equations of motion and constraints of coupled system are written in terms of a set of reference and modal coordinates. Semiactive control techniques are then used for suppressing vibrations at some desired points, in the chassis, located away from suspension attachments. Remote measurement of local displacements and velocities at these points are used to implement a corrective control action into suspension dampers of adjustable damping characteristics. This method is applied to a planar vehicle model with flexible chassis traversing a bump. Numerical results demonstrate validity of the developed model and effectiveness of semiactive control in improving ride quality characteristics.

Copyright © 1989 by ASME
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