電動パワーステアリングの操舵トルク低減制御方式 : オブザーバを用いた発振周波数に対するステアリング角速度制御 A New Control Strategy to Reduce Steering Torque for Vehicles Equipped with Electric Power Steering : Steering Angular Velocity Controller Using the Observer for Specified Frequency
This paper proposes a new Electric Power Steering (EPS) control strategy that enables remarkable progress on steering maneuverability for stationary vehicles. Using a conventional controller, undesirable steering vibration prevented us from reducing steering torque. To eliminate this vibration, we developed a new control strategy based on steering angular velocity control for specified frequency using a newly developed steering shaft angular-velocity observer. We experimented with this proposed control algorithm using a test vehicle and confirmed that it enables reduced steering torque without any perceived vibration for drivers from slow steering to rapid steering. Concerning the assist-map, the proposed control strategy enabled more than three times higher gradient compared with that of the conventional one. This proposed control strategy requires no supplemental sensors.
- 日本機械学會論文集. C編 = Transactions of the Japan Society of Mechanical Engineers. C
日本機械学會論文集. C編 = Transactions of the Japan Society of Mechanical Engineers. C 68(675), 3238-3245, 2002-11-25