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Energies 2014, 7(6), 3748-3763; doi:10.3390/en7063748
Article

An Acceleration Slip Regulation Strategy for Four-Wheel Drive Electric Vehicles Based on Sliding Mode Control

* ,
,
 and
National Engineering Laboratory for Electric Vehicles, Beijing Institute of Technology, Beijing 100081, China
* Author to whom correspondence should be addressed.
Received: 28 January 2014 / Revised: 15 May 2014 / Accepted: 3 June 2014 / Published: 17 June 2014
(This article belongs to the Special Issue Advances in Hybrid Vehicles)
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Abstract

This paper presents an acceleration slip regulation (ASR) system for four-wheel drive (4WD) electric vehicles, which are driven by the front and rear axles simultaneously. The ASR control strategy includes three control modes: average distribution of inter-axle torque, optimal distribution of inter-axle torque and independent control of optimal slip rate, respectively, which are designed based on the torque adaptive principle of inter-axle differential and sliding mode control theory. Furthermore, in order to accurately describe the longitudinal tyre force characteristic, a slip rate calculation formula in the form of a state equation was used for solving the numerical problem posed by the traditional way. A simulation was carried out with the MATLAB/Simulink software. The simulation results show that the proposed ASR system can fully use the road friction condition, inhibit the drive-wheels from slipping, and improve the vehicle longitudinal driving stability.
Keywords: acceleration slip regulation (ASR); four-wheel drive (4WD); electric vehicle; sliding mode control acceleration slip regulation (ASR); four-wheel drive (4WD); electric vehicle; sliding mode control
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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He, H.; Peng, J.; Xiong, R.; Fan, H. An Acceleration Slip Regulation Strategy for Four-Wheel Drive Electric Vehicles Based on Sliding Mode Control. Energies 2014, 7, 3748-3763.

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