Affiliation:
1. Shandong Provincial Key Laboratory of Network Based Intelligent Computing
Abstract
The non-linear characteristics of magneto-rheological (MR) suspension systems have limited control performance of modern control theory based on linear feedback control. In this paper, a four DOF half car suspension model with two nonlinear MR dampers is adopted. In order to account for the nonlinearity, a sliding mode controller, which has inherent robustness against system nonlinearity, is formulated to improve comfort and road holding of the car under industrial specifications and it is fit to semi-active suspensions. The numerical result shows that the semi-active suspension using the sliding mode controller can achieve better ride comfort than the passive and also improve stability.
Publisher
Trans Tech Publications, Ltd.
Reference8 articles.
1. Wereley N.M. and Pang L, Nondimensional analysis of semi-active electrorheological and magnetorheological dampers using approximate parallel plate models, Smart Materials and Structures, vol. 7, no. 5, (1998) pp.732-743.
2. S. -J. Huang and H. -C. Chao, Fuzzy logic controller for vehicle active suspension system, Proc. I MECH E Part D J. Automobile Engineering, vol. 214-D, (2000)p.1–12.
3. D. Hrovat, Application of optimal control to advanced automotive suspension design, Trans. ASME J. Dynam. Syst., Meas., Cantr., vol. 115, (1993)p.328–342.
4. Du, H., Sze, K. Y., Lam, J., Semi-active control of vehicle suspension with magneto-rheological dampers', Journal of Sound and Vibration, 283, (2005)pp.981-996.
5. A. Alleyne and J.K. Hedrick, Nonlinear control of a quarter car active suspension, in proc. 1992 Amer. Contr. Conf. (ACC), Chicago IL, June, (1992).