電動パワーステアリングのオンセンタ特性向上制御方式 : 擬似的路面反力トルク増大制御方式 A Control Strategy to Improve On-center Feel for Vehicles Equipped with Electric Power Steering : Aligning Torque Augmenting Control
This paper proposes a new Electric Power Steering (EPS) control strategy that enables improvement on steering-wheel returnability. If we use a conventional EPS controller, frictional loss torque in the steering mechanism reduces steering-wheel returnability, which drivers occasionally perceive as unpleasant. To improve steering-wheel returnability for EPS-equipped vehicles, we analyze the relationship between vehicle parameter and returnability. According to this analytical result, we develop a new control strategy based on estimation of aligning torque generated by tires and road surfaces. We experiment with this proposed control algorithm using a test vehicle and confirm that it enables improved steering wheel returnability as well as better on-center feeling.
- 日本機械学会論文集. C編
日本機械学会論文集. C編 73(733), 2464-2472, 2007-09-25