Abstract
To improve the trackability of in-wheel motor drive (IWMD) and wheel-individual steer electric vehicles (EVs) when steering actuators fail, the fail-operation control strategy was proposed to correct vehicles in a steering failure situation and avoid losing control of vehicle steering. A linear quadratic regulator (LQR) decides the additional yaw moment of the vehicle according to vehicle state errors. The tire force estimation module estimates the compensating resistance moment generated by the failed wheel according to the tire slip angle and the vertical tire force. By isolating the failed wheel, the optimal torque distribution (OTD) controller allocates the additional yaw moment and the compensating resistance moment to normal wheels to realize the fail-operation control of the IWMD vehicle. The control effect was verified through co-simulation of MATLAB/Simulink and Trucksim. Compared with the uncontrolled and direct torque allocation methods, the proposed OTD method reduces the lateral trajectory error of the vehicle by 86% and 60.5%, respectively, when failure occurs, and achieves better velocity maintaining ability, which proves the effectiveness of the proposed fail-operation control strategy.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jilin Province
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous)
Reference19 articles.
1. A study on differential technology of in-wheel motor drive EV;Jin;Automot. Eng.,2007
2. Differential assisted steering applied on electric vehicle with electric motorized wheels;Wang;J. Jilin Univ. (Eng. Technol. Ed.),2010
3. Independent wheel torque control of 4WD electric vehicle for differential drive assisted steering
4. Control strategies of handling improvement of distributed drive electric vehicle;Yu;J. Tongji Univ. (Nat. Sci.),2014
5. An optimal torque distribution control strategy for four-independent wheel drive electric vehicles
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