Analysis on Electric Power Steering System to Improve Vehicle Handling and Steering Feeling for Avoidance Maneuver

抄録

This paper focuses on the handling response and steering feel characteristics of avoidance maneuver enhanced by EPS control strategies. For an urgent avoidance, driver is required for rapid response so as to suffer high level of physical burden and mental strain. In this study, we address the problem in two ways: one is the steering assistance control to reduce driver steering effort and to realize high cornering response. The other is damp compensation control to solve damping problems that affect steering stability and steering feel. Evaluations of the EPS effectiveness on high speed avoidance performance are conducted by theoretical analysis and simulation studies. The theoretically analysis is based on open-loop the frequency response characteristics of steering angle and vehicle lateral acceleration relative to steering torque input. The avoidance simulation study is conducted by adopting a driver model to describe the human steering behavior.