Steering Reactive Torque Presentation Method （转向反应转矩表示方法）.pdfVIP

Review of Automotive Engineering 29 (2008) 287-294 Steering Reactive Torque Presentation Method for a Steer-By-Wire Vehicle -Feedback of a Lateral Acceleration at a Center of Percussion with Respect to Rear Wheels- Toshihiro Hiraoka, Osamu Nishihara, Hiromitsu Kumamoto Department of Systems Science, Graduate School of Informatics, Kyoto University Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan Received 8 June 2007, received in revised form 17 July 2007 Abstract The present paper proposes a steering reactive torque presentation method for an active four-wheel steering vehicle. The reactive torque is derived from a pseudo steering reactive torque around a king pin axis, which is defined by a feedback of a lateral acceleration at a center of percussion with respect to rear wheels. A driver who drives the vehicle on a low friction road can notice an unstable vehicle state because the reactive torque decreases. Driving simulator experiments were conducted in order to verify that the proposed steering reactive torque presentation method enables them to perceive the vehicle state more effectively than the conventional method whose steering reactive tor- que is in proportion to the driver’s steering wheel input. 1. Introduction vehicle runs on. For example, they can feel that the steering reactive torque decreases when the vehicle run The number of traffic deaths in Japan has decreased in on a slippery road. On the other hand, drivers of the recent years, because passive safety technologies such as SBW vehicle cannot perceive the road information