ELECTRIC POWER STEERING CONTROL APPARATUS
First Claim
1. An electric power steering control apparatus comprising:
- a steering torque detection section that detects steering torque generated by a driver of a vehicle;
a motor that generates assist torque to assist the steering torque;
a rotational speed detection section that detects the rotational speed of the motor;
a torque control section that calculates an assist torque current corresponding to the assist torque based on the steering torque; and
a damping control section that calculates a damping current to be added to the assist torque current for suppressing vibrations generated in a steering system of the vehicle;
wherein the damping control section reduces a damping control gain for calculation of the damping current when the rotational speed of the motor is equal to or less than a predetermined speed.
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Accused Products
Abstract
An electric power steering control apparatus can reduce steering torque even in a steering holding state or a slight steering state without providing an unpleasant feeling to a driver. The apparatus includes a torque sensor for detecting steering torque generated by the driver for a vehicle, a motor for generating assist torque to assist the steering torque, a rotational speed detector for detecting the rotational speed of the motor, a torque controller for calculating an assist torque current corresponding to the assist torque based on the steering torque, and a damping control section for calculating a damping current to be added to the assist torque current to suppress vibrations generated in a steering system of the vehicle. The damping controller reduces a damping control gain to calculate the damping current when the rotational speed of the motor is equal to or less than a predetermined speed.
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Citations
10 Claims
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1. An electric power steering control apparatus comprising:
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a steering torque detection section that detects steering torque generated by a driver of a vehicle; a motor that generates assist torque to assist the steering torque; a rotational speed detection section that detects the rotational speed of the motor; a torque control section that calculates an assist torque current corresponding to the assist torque based on the steering torque; and a damping control section that calculates a damping current to be added to the assist torque current for suppressing vibrations generated in a steering system of the vehicle; wherein the damping control section reduces a damping control gain for calculation of the damping current when the rotational speed of the motor is equal to or less than a predetermined speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification