关键词: 电动助力转向, 助力特性, 模糊控制

Abstract: This paper studies the assist characteristics and simulation of electric power steering system, which provides theoretical basis and design method for the design and development of electric power steering system. Based on the comparison and analysis of linear, zigzag and curvilinear assist characteristic curves, the power assist control strategy of EPS system based on fuzzy control is proposed, and the three-dimensional atlas of EPS power curve under different vehicle speed and steering wheel torque input is obtained. The three-dimensional atlas of EPS power curve shows that the power assistance control strategy based on fuzzy control is in line with the actual EPS system's assistance in the steering process requirements.

Key words: Electric power steering, Assist characteristic, Fuzzy control