Title: Optimal active suspension control based on a quarter-car model: an analytical solution

Authors: Naser Pourqorban Shirjoposht, Iraj Hassanzadeh, Farzad Hashemzadeh, Ghasem Alizadeh

Addresses: Faculty of Electrical and Computer Engineering, Control Engineering Department, University of Tabriz, Tabriz, 12345, Iran. ' Faculty of Electrical and Computer Engineering, Control Engineering Department, University of Tabriz, Tabriz, 12345, Iran. ' Faculty of Electrical and Computer Engineering, Control Engineering Department, University of Tabriz, Tabriz, 12345, Iran. ' Faculty of Electrical and Computer Engineering, Control Engineering Department, University of Tabriz, Tabriz, 12345, Iran

Abstract: The objective of this paper is to present a new control technique for controlling of an active suspension system with hydraulic dynamics for a non-linear quarter-car model. An optimal law is developed for active suspension by the states estimation with Extended Kalman Filter (EKF) and then the states prediction of a non-linear quarter-car model. The states of quarter-car model are first estimated by EKF and then predicted by Taylor series expansion and finally a control law is introduced by minimising the local differences between the predicted and desired states. The effectiveness of the designed controller is compared with a proportional integral sliding mode controller. The simulations show that under the proposed controller, the car has good passenger comfort and safe manoeuvrability.

Keywords: active suspension control; quarter car models; nonlinear modelling; EKF; extended Kalman filter; proportional integral control; PI sliding mode control; optimal control; vehicle suspensions; hydraulic dynamics; passenger comfort; safe manoeuvrability; vehicle safety.

DOI: 10.1504/IJVS.2010.035316

International Journal of Vehicle Safety, 2010 Vol.5 No.1, pp.1 - 20

Available online: 21 Sep 2010 *

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