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Journal of Control Science and Engineering
Volume 2015, Article ID 512024, 8 pages
http://dx.doi.org/10.1155/2015/512024
Research Article

An Improved Optimal Slip Ratio Prediction considering Tyre Inflation Pressure Changes

1Department of Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2Centre for Efficiency and Performance Engineering, University of Huddersfield, Huddersfield HD1 3DH, UK

Received 7 August 2015; Revised 2 November 2015; Accepted 10 November 2015

Academic Editor: Petko Petkov

Copyright © 2015 Guoxing Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The prediction of optimal slip ratio is crucial to vehicle control systems. Many studies have verified there is a definitive impact of tyre pressure change on the optimal slip ratio. However, the existing method of optimal slip ratio prediction has not taken into account the influence of tyre pressure changes. By introducing a second-order factor, an improved optimal slip ratio prediction considering tyre inflation pressure is proposed in this paper. In order to verify and evaluate the performance of the improved prediction, a cosimulation platform is developed by using MATLAB/Simulink and CarSim software packages, achieving a comprehensive simulation study of vehicle braking performance cooperated with an ABS controller. The simulation results show that the braking distances and braking time under different tyre pressures and initial braking speeds are effectively shortened with the improved prediction of optimal slip ratio. When the tyre pressure is slightly lower than the nominal pressure, the difference of braking performances between original optimal slip ratio and improved optimal slip ratio is the most obvious.