Continuous and Discontinuous Shock Absorber Control through Skyhook Strategy in Semi-Active Suspension System (4DOF Model)

Authors: A. Shamsi, N. Choupani

Abstract:

Active vibration isolation systems are less commonly used than passive systems due to their associated cost and power requirements. In principle, semi-active isolation systems can deliver the versatility, adaptability and higher performance of fully active systems for a fraction of the power consumption. Various semi-active control algorithms have been suggested in the past. This paper studies the 4DOF model of semi-active suspension performance controlled by on–off and continuous skyhook damping control strategy. The frequency and transient responses of model are evaluated in terms of body acceleration, roll angle and tire deflection and are compared with that of a passive damper. The results show that the semi-active system controlled by skyhook strategy always provides better isolation than a conventional passively damped system except at tire natural frequencies.

Keywords: Semi-active suspension system, Skyhook, Vibration isolation, 4DOF model.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1079666

References:

[1] Y. Liu, T.P. Waters, M.J. Brennan, "A comparison of semi-active damping control strategies for vibration isolation of harmonic disturbances" Sound and Vibration J., vol. 280, pp. 21-39, 2003.
[2] J. P. Hyvärinen, The Improvement of Full Vehicle Semi-Active Suspension Through Kinematical Model, Oulo University Press, 2004.
[3] D. C. Karnopp, M. J. Crosby, R. A. Harwood, "Vibration control using semi-active force generators" Engineering for Industry J., vol. 96, no. 2, pp. 619-626, 1974.
[4] D. C. Karnopp, "Design principles for vibration control systems using semi-active dampers" Dynamic Systems, Measurement, and Control J., vol. 112, pp. 448-455, 1990.
[5] F. D. Goncalves, "Dynamic Analysis of Semi-Active Control Techniques for Vehicles Applications" M.S. thesis, Dept. Mech. Eng., Virginia Polytechnic Institute and State University, Virginia, 2001.
[6] A. K. Carter, "Transient Motion Control of Passive and Semi-active Damping for Vehicle Suspensions" M.S. thesis, Dept. Electron. Eng., Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 1998.
[7] E. J. Krasnicki, "Comparison of analytical and experimental results for a semi-active vibration isolator" Shock and Vibration Bulletin., vol. 50, pp. 69-76, 1980.
[8] E. J. Krasnicki, "The experimental performance of an on-off active damper" 51st Shock and Vibration Symposium, San Diego, USA, 1980.
[9] E. D. Blanchard, "On the Control Aspects of Semi active Suspensions for Automobile Applications" M.S. thesis, Dept. Mech. Eng., Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 2003.