Title: Dynamics and control policies analysis of semi-active suspension systems using a full-car model

Authors: S.I. Ihsan, Waleed F. Faris, M. Ahmadian

Addresses: Mechanical Engineering Department, International Islamic University Malaysia (IIUM), Malaysia. ' Mechanical and Mechatronics Engineering Departments, International Islamic University Malaysia (IIUM), Malaysia. ' Mechanical Engineering Department, Virginia Polytechnic and State University, USA

Abstract: Several control policies of semi-active systems, namely skyhook, groundhook and hybrid controls, are presented. Their ride comfort, suspension displacement and road-holding performances are analysed and compared with passive systems. The analysis covers both transient and steady-state responses in the time domain and transmissibility response in the frequency domain. The results show that the hybrid control policy yields better comfort than a passive suspension, without reducing the road-holding quality or increasing the suspension displacement for typical passenger cars. The hybrid control policy is also shown to be a better compromise between comfort, roadholding and suspension displacement than the skyhook and groundhook control policies.

Keywords: ride comfort; full-car model; semi-active suspension systems; groundhook control; skyhook control; hybrid control; passive suspension systems; suspension displacement; road-holding performance; passenger cars; automotive suspensions; vehicle vibration.

DOI: 10.1504/IJVNV.2007.016399

International Journal of Vehicle Noise and Vibration, 2007 Vol.3 No.4, pp.370 - 405

Published online: 26 Dec 2007 *

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