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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
Yaohua Li, Qianlong Feng, Yangsen Zhang, Youfei Nan
Chang’an University
PDF Links Corresponding Author.  Yaohua Li , Email. Yaohua.Li@chd.edu.cn
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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