| 摘要 |
PURPOSE: To provide a motor-driven power steering control device capable of precluding such an occurrence that the steering wheel becomes heavier than necessary even in the case of steep steering operation and eliminating necessity for changing any assist map even in case the amount of damping compensation is altered. CONSTITUTION: The motor-driven power steering control device is equipped with a car speed sensor 21, a steering torque sensor 22, a steering shaft reaction torque measuring instrument 23, a motor speed sensor 24, a motor acceleration sensor 25, a steering torque controller 26 to compute the basic target current, a damping compensator 27 to determine the gain of the damping torque on the basis of the steering shaft reaction torque and compute the amount of damping compensation on the basis of the gain of damping torque and the motor speed, an inertia compensator 28 to determine the gain of the inertia compensation torque on the basis of the steering shaft reaction torque and compute the amount of inertia compensation on the basis of the gain of inertial compensation torque and the motor acceleration, and an adder 29 to compute the target current upon compensating the basic target current with the amount of damping compensation and the amount of inertial compensation.
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