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 in accordance with said steering torque;
a motor angular velocity detection section that detects the angular velocity of said motor;
a specific frequency detection section that detects the frequency of a steering vibration generated due to the structure of said vehicle;
a phase compensation section that converts the phase of said motor angular velocity based on a detected value of said motor angular velocity; and
a vibration suppression current calculation unit that calculates a steering vibration suppression current for suppression of said steering vibration based on the respective output signals of said specific frequency detection section and said phase compensation section.
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Accused Products
Abstract
An electric power steering control apparatus can reduce a steering vibration such as shimmy vibration generated due to the structure of a vehicle without adding new mechanism elements. The apparatus includes a torque sensor for detecting steering torque generated by a driver, a torque controller for calculating an assist torque current for assisting the steering torque based on the detected steering torque, a vehicle speed detector for detecting the speed of the vehicle, a specific frequency detector for detecting a specific frequency from the detected vehicle speed, a motor angular velocity calculator for calculating a motor angular velocity from a motor angle detected by an angle detector, a phase compensator for converting a vibration frequency of the motor angular velocity, and a vibration suppression current calculator for calculating a vibration suppression current to suppress the steering vibration from respective output signals of the phase compensator and the specific frequency detector.
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Citations
9 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 in accordance with said steering torque; a motor angular velocity detection section that detects the angular velocity of said motor; a specific frequency detection section that detects the frequency of a steering vibration generated due to the structure of said vehicle; a phase compensation section that converts the phase of said motor angular velocity based on a detected value of said motor angular velocity; and a vibration suppression current calculation unit that calculates a steering vibration suppression current for suppression of said steering vibration based on the respective output signals of said specific frequency detection section and said phase compensation section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification