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World Electric Vehicle Journal is published by MDPI from Volume 9 issue 1 (2018). Articles in this Issue were published by The World Electric Vehicle Association (WEVA) and its member the European Association for e-Mobility (AVERE), the Electric Drive Transportation Association (EDTA), and the Electric Vehicle Association of Asia Pacific (EVAAP). They are hosted by MDPI on mdpi.com as a courtesy and upon agreement with AVERE.
Open AccessArticle

Implementation and Control Logic Design of Intelligent Electric Power Steering System

Mechanical and Systems Research Laboratories, Industrial Technology Research Institute, 195, Sec 4, Chung Hsing Rd., Chutung, Hsinchu, Taiwan, R. O. C.
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World Electr. Veh. J. 2009, 3(4), 711-718; https://doi.org/10.3390/wevj3040711
Published: 25 December 2009
In this paper, an intelligent electric power steering system is proposed to replace a traditional hydraulic power steering system and implemented in a real light hybrid electric vehicle. An intelligent fuzzy control algorithm is applied to yield basic assist logic, return compensation logic, damping compensation logic, and inertia compensation logic in an assist steering system. According to steering wheel angle and vehicle speed, the proposed fuzzy inference logic can provide needed assist motor current. Under experts’ knowledge of fuzzy control, the electric power steering system can satisfy smooth driving. In addition, four driving modes are designed to complete the control strategy. Different driving modes have corresponding fuzzy inference strategies to complete the assist and compensation logic. Finally, the intelligent electric power steering system with a new 12V/500W EPS motor is applied in a real light hybrid electric vehicle. Experimental results demonstrate that the proposed method is reasonable and feasible.
Keywords: Electric power; assist steering; fuzzy control Electric power; assist steering; fuzzy control
MDPI and ACS Style

Chang, S.-H.; Chen, P.-Y.; Ting, Y.-H.; Hung, S.-W. Implementation and Control Logic Design of Intelligent Electric Power Steering System. World Electr. Veh. J. 2009, 3, 711-718.

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