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Frontiers of Mechanical Engineering

ISSN 2095-0233

ISSN 2095-0241(Online)

CN 11-5984/TH

Postal Subscription Code 80-975

2018 Impact Factor: 0.989

Front Mech Eng    2012, Vol. 7 Issue (1) : 16-22    https://doi.org/10.1007/s11465-012-0316-5
RESEARCH ARTICLE
Towards neutral steer and sideslip reduction for four-wheeled electric vehicles
Guisheng ZHAI1(), Masayuki NAKA2, Tomoaki KOBAYASHI2, Joe IMAE2
1. Department of Mathematical Sciences, Shibaura Institute of Technology, Saitama 337–8570, Japan; 2. Department of Mechanical Engineering, Osaka Prefecture University, Osaka 599–8531, Japan
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Abstract

This paper proposes an approach to achieving both neutral steer and sideslip reduction for four-wheeled electric vehicles. The control problem is reduced to constructing a servo system tracking appropriate reference input, where the tracking is realized in the framework of ? control. To deal with time-varying vehicle velocity for practical purpose, a gain scheduling strategy is developed to obtain the controller, where the lower and upper bounds of the velocity are used to obtain a polytopic range for the parameters in the system coefficient matrices. A numerical example is given to show validity of the proposed approach.

Keywords four-wheeled electric vehicles      neutral steer      sideslip reduction      servo system      ? control')" href="#">? control      gain scheduling      linear matrix inequality (LMI)     
Corresponding Author(s): ZHAI Guisheng,Email:zhai@shibaura-it.ac.jp   
Issue Date: 05 March 2012
 Cite this article:   
Guisheng ZHAI,Masayuki NAKA,Tomoaki KOBAYASHI, et al. Towards neutral steer and sideslip reduction for four-wheeled electric vehicles[J]. Front Mech Eng, 2012, 7(1): 16-22.
 URL:  
https://academic.hep.com.cn/fme/EN/10.1007/s11465-012-0316-5
https://academic.hep.com.cn/fme/EN/Y2012/V7/I1/16
Fig.1  Steering property
Fig.2  Dynamics of moving wheels. (a) Move forward direct; (b) turn a corner
Fig.3  Vehicle model (top view)
Fig.4  1-type servo system
Fig.5  2-type servo system
Fig.6  Polytopic parameter range
symbolvalue
m/kg1500
lf/m1.1
lr/m1.4
Kf/(N·rad-1)45000
Kr/(N·rad-1)75000
I/(kg · m2)2200
Tab.1  Physical system parameters
Fig.7  Tracking error between and
Fig.8  Tracking error between and *
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