Patent ID: 7831355

Claim:
An electric power steering apparatus for performing steering assist by transmitting a driving force produced by an electric motor to a steering mechanism, comprising: a driving target value setting unit for setting a driving target value of the electric motor; a steering acceleration detecting unit for detecting or estimating a steering acceleration; a correction amount computing unit for computing a control correction amount in accordance with the steering acceleration detected or estimated by the steering acceleration detecting unit; a vehicle acceleration detecting unit for detecting an acceleration of a motor vehicle equipped with the electric power steering apparatus; an acceleration adaptive gain setting unit for setting a gain in accordance with an acceleration detected by the vehicle acceleration detecting unit; a multiplication unit for determining a gain adjusted control correction amount by multiplying the control correction amount computed by the correction amount computing unit with a gain set by the acceleration adaptive gain setting unit; a correcting unit for correcting the driving target value on the basis of the gain adjusted control correction amount determined by the multiplication unit; and a motor driving unit for driving the electric motor on the basis of the driving target value corrected by the correcting unit.