| 摘要 |
PROBLEM TO BE SOLVED: To improve active safety by restraining influences of cross wind disturbance to steering while securing a smooth traveling performance on a curved road in an electric power steering device. SOLUTION: This device is equipped with an estimation means 32 for separating a lateral gradient disturbanceϕrb from other lateral disturbanceϕcw among lateral disturbances of a vehicle for estimation from a steering angleδ, a yaw rateγ, lateral acceleration Gy, and vehicle speed V of the vehicle detected by a steering angle detecting means 22, a yaw rate detecting means 23, a lateral acceleration detecting means 24, and a vehicle speed detecting means 25 respectively based on a steering-vehicle system model of the vehicle. A steering assist torque generated to an electric motor 11 in a manner to restrain the lateral disturbanceϕcw with the lateral gradient disturbance removed from the lateral disturbances of the vehicle is corrected from results estimated by the estimation means 32. COPYRIGHT: (C)2004,JPO |
