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International Journal of Automotive Technology > Volume 20(3); 2019 > Article
International Journal of Automotive Technology 2019;20(3): 477-486.
doi: https://doi.org/10.1007/s12239-019-0045-4
DUAL-MOTOR FULL-WEIGHT ELECTRIC POWER STEERING SYSTEM FOR COMMERCIAL VEHICLE
Yaohua Li, Qianlong Feng, Yangsen Zhang, Youfei Nan
Chang’an University
PDF Links Corresponding Author.  Yaohua Li , Email. Yaohua.Li@chd.edu.cn
ABSTRACT
In order to study the electric power steering system (EPS) which is suitable for the steering characteristics of commercial vehicles, the effect of weight on steering performance is analyzed, and a dual-motor full-weight EPS system is proposed. Firstly, the full-weight assist characteristics are studied, and two current distribution schemes and corresponding fault-tolerant control strategies are proposed according to the structural characteristics of dual-motor EPS system. By comparing with the traditional single-weight EPS system, it is proved that the full-weight EPS system improves the control stability and makes the driver get a better road feeling. Through the double line change test and step test, the effectiveness of the two current distribution schemes are verified, and it has better fault-tolerance performance. By comparison, the faulttolerance performance of scheme two is better than that of scheme one.
Key Words: Power steering system, Dual-motor, Full-weight, Current distribution schemes, Fault-tolerant control strategies
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