Title: Transient dynamic behaviour of vehicle cornering on μ-step road

Authors: Shengyong Ye; Jianwei Lu; Lei Shi; Yingjie Zhu; Ruiming Xu

Addresses: School of Automotive and Transportation Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230000, China ' School of Automotive and Transportation Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230000, China ' School of Automotive and Transportation Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230000, China ' School of Automotive and Transportation Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230000, China ' School of Automotive and Transportation Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230000, China

Abstract: In this paper, the transient dynamic behaviour of vehicle cornering on μ-step road is studied. Particularly, the transient characteristic of tyre lateral force caused by the variation of road friction coefficient is fully considered in the establishment of mathematical model. The transient response of the tyre lateral force and vehicle motion under different conditions is obtained by solving the model. The tyre lateral force saturation caused by sudden reduction of road friction coefficient is analysed, and the critical initial steer angle is calculated. Then, the kinematic differential equation of vehicle cornering is used to analyse the vehicle trajectory. Moreover, an experiment of transient tyre force testing is carried out to verify the effectiveness of the proposed method. The simulation and test results show that the change of road condition affects the vehicle motion state and tyre lateral force, and causes the deviation of vehicle trajectory.

Keywords: vehicle; cornering; transient dynamics; μ-step road; tyre force saturation.

DOI: 10.1504/IJVD.2024.143973

International Journal of Vehicle Design, 2024 Vol.96 No.2, pp.87 - 105

Received: 05 Mar 2024
Accepted: 17 Jul 2024
Published online: 16 Jan 2025 *

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