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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

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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 which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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