电动助力转向系统转向性能的客观评价

针对电动助力转向的结构特点，分析了电动助力转向对汽车转向性能的影响，提出从转向轻便性、转向回正性、转向盘中间位置区域性能、转向盘振动、随动灵敏度和助力特性等方面进行电动助力转向系统转向性能的客观评价，并探讨了相应的评价指标，对电动助力转向助力控制规律、基本设计参数以及相关试验标准的确定有指导意义。

Study on Object Evaluation of Steering Performance of Electric Power Steering

Electric power steering is a new structure with novel technique of power steering. The electric power steering brings new effects on the steering maneuvrability, steering returnability, etc. The evaluation of the conventional hydraulic power steering couldn't be applied for the electric power steering. It is necessary to establish a new system for steering performance evaluation of electric power steering. This paper analyzes the effect of electric power steering on the steering performance based on its configuration feature and then the object evaluation of steering performance of electric power steering is studied. The new system of evaluation includes steering maneuvrability, steering returnability, on center handling performance, steering handwheel vibration, servo motion sensitivity and assist characteristic. The corresponding evaluation indexes are also discussed. This research can be used to determine the assist control strategy, the basic parameters and steering performance trail standard of electric power steering.