The Effect of Bandwidth of Semiactive Dampers on Vehicle Ride

[+] Author and Article Information
J. Lieh

Mechanical and Materials Engineering, Wright State University, Dayton, Ohio 45435

J. Dyn. Sys., Meas., Control 115(3), 571-575 (Sep 01, 1993) (5 pages) doi:10.1115/1.2899142 History: Received April 08, 1992; Online March 17, 2008


A passenger car model with a full car body and four wheel-axle assemblies is used to investigate the influence of semiactive suspensions on ride performance. Mean square values are evaluated for various damping levels and control valve switching times. Due to severe nonlinearities, frequency responses are not obtained directly. They are reconstructed from Fast Fourier Transform (FFT) using a Hanning window. The results are compared with those from LQR active suspensions and pure on-off dampers. The effect of control valve switching time (bandwidth) is studied and shows a significant influence on the vehicle ride, suspension travels, and tire deflections.

Copyright © 1993 by The American Society of Mechanical Engineers
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