自動車のファジィ制御型可変特性操舵系による衝突回避性能

抄録

A steer-by-wire technology enables steering control of automobile by electrical signal without mechanical connection of tires and a steering wheel．This technology makes the characteristic of steering system change．Therefore，it can change relationship between steering angles and actual steer angles of tires according to the driver and driving conditions of vehicle．It has potentials to allow a driver rapidly and stably take action to avoid a collision if a driver must execute the emergency avoidance．The purpose of this research is to study possibilities of the improvement of the emergency avoidance performance by using a variable characteristics steering system（VCSS）as a steer-by-wire technology．Fuzzy control is used for the control of the VCSS．We conducted a simulation of an emergency lane change to avoid an obstacle on a road. We investigated vehicle motion，driver’s conditions and parameters of fuzzy control by comparing the vehicle having fuzzy control with the normal vehicle．The result of simulation shows the increase emergency avoidance performance by using the VCSS．