Electric power steering device and method for controlling the same

A method for controlling an electric power steering device, said method comprising:

• obtaining steering torque;
• obtaining a rotation angular speed of a motor for generating a steering assisting force;
• obtaining a steering angular acceleration correspondence value, which corresponds to a sum of a value obtained by multiplying a change acceleration of the steering torque by a gain and a rotation angular acceleration of said motor, according to the obtained steering torque and the obtained rotation angular speed of said motor;
• regulating the gain;
• storing a relation between a motor output correction value, which is preliminarily determined in such a way as to compensate for the influence of the inertia on steering, and the steering angular acceleration correspondence value;
• and
• controlling said motor in such a way as to correct the steering assisting force according to the motor output correction value obtained according to the obtained steering angular acceleration correspondence value and the stored relation.

An electric power steering device, comprising:

• a motor for generating a steering assisting force;
• means for obtaining a steering angular acceleration correspondence value, which corresponds to a value that is obtained by adding a rotation angular acceleration of said motor with a product of a change acceleration of a steering torque and a gain, according to the obtained steering torque and rotation angular speed of the motor;
• and
• means for regulating the gain.

A method for controlling an electric power steering device, said method comprising:

• generating, by a motor, a steering assisting force;
• obtaining a steering angular acceleration correspondence value, which corresponds to a value that is obtained by adding a rotation angular acceleration of said motor with a product of a change acceleration of a steering torque and a gain, according to the obtained steering torque and rotation angular speed of the motor;
• and
• regulating the gain.