| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric power steering device for improving steering feeling. SOLUTION: The electric power steering device includes an assist torque setting portion for setting an assist torque based on a steering torque, a reaction force torque setting portion 21 for setting a steering reaction force torque Tb1 based on a vehicle speed V and a yaw rateγ, a target steering angular velocity setting portion 23 for setting a target steering angular velocityωt based on the stability of a vehicle behavior estimated according to the vehicle speed V and a lateral acceleration Gy, and a reaction force correction torque setting portion 24 for setting a reaction force correction torque Tb2 based on the difference between an actual steering angular velocityωand the target steering angular velocityωt. The electric power steering device drives and controls a steering assist motor based on the assist torque, steering reaction force torque Tb1, and the reaction force correction torque Tb2. The target steering angular velocity setting means 23 sets the target steering angular velocityωt higher as the stability of the vehicle behavior is higher. COPYRIGHT: (C)2010,JPO&INPIT |
