电动助力转向中间位置转向感觉分析

Analysis of On-center Steering Perception of EPS

针对电动助力转向系统(EPS)的转向感觉进行了系统分析,其中转向盘中间位置的转向主观感受是汽车转向感觉研究的主要内容,直接影响驾驶员对稳定性、安全性和行驶的判断,研究通过整车中间位置转向感觉主观评价试验,介绍了试验及数据处理方法,并对客观评价指标进行了分析。分别研究了中间位置转向灵敏程度,转向手力特性,以及中间位置行驶时的汽车响应特性等三方面的客观评价指标。应用这些指标参数,可以系统全面的评定EPS中间位置转向感觉,指导EPS与整车的匹配开发,以获得更适宜的中间位置转向感觉。

The suitable on-center steering perception when driving a vehicle equipped with Electric Power Steering System （EPS） was investigated. The on-center subjective steering perception is the main content of vehicle steering perception analysis, which directly impacts the driver＇s judge on stability, security and maneuverability. The subjective evaluation test and data processing of on-center steering perception were introduced. The related objective evaluation indexes, which consist of eight parameters that describe on-center steering sensitivity, steering torque character and vehicle response performance of on-center maneuvering, were also analyzed.To use these objective evaluation parameters makes it possible to benchmark EPS on-center performance entirely and guide EPS development to achieve good on-center steering perception.