Title: Modelling and analysis of electric power steering system and its effect on vehicle dynamic behaviour

Authors: Y. Gene Liao, H. Isaac Du

Addresses: College of Engineering, Wayne State University, 5330 Clearview Drive, Troy, MI 48098, USA. General Motors Corporation, MC 483-710-241, 895 Joslyn Avenue, Pontiac, MI 48340, USA

Abstract: While most passenger vehicles equipped with power steering systems are hydraulic power assisted, Electric Power Steering (EPS) systems are becoming wide spread since they can afford higher fuel efficiency. This paper develops an integrated simulation of an EPS control system with a full vehicle model. Using co-simulation technique, a full vehicle model interacting with EPS control algorithm is concurrently simulated on a single bump road condition. The effects of EPS on the vehicle dynamic behaviour and handling responses resulting from steer and road input are analysed and compared with proving ground experimental data. The comparisons show reasonable agreement on tie-rod load, rack displacement, steering wheel torque and tyre centre acceleration. This developed co-simulation capability may be useful for EPS performance evaluation and calibration as well as for vehicle handling performance integration.

Keywords: co-simulation; electric power steering; power steering; vehicle dynamics.

DOI: 10.1504/IJVAS.2003.003543

International Journal of Vehicle Autonomous Systems, 2003 Vol.1 No.2, pp.153 - 166

Available online: 08 Oct 2003 *

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