A return control method and device for an electric power steering device

An electric power steering and positive control technology, applied in the direction of electric steering mechanism, etc., can solve the problems of reducing steering wheel alignment performance, alignment overshoot, insufficient steering wheel alignment, etc., to improve alignment performance, improve alignment, The effect of improving the return to positive performance
CN109911004BActive Publication Date: 2022-05-24SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2022-05-24

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Abstract

The invention discloses a return control method and device of an electric power steering device. The method includes the steps of: establishing a mathematical model of the electric power steering device; testing the steering work under different road surface resistances through bench experiments, and making the results into a table Stored in the electronic control unit; determine the conditions for entering the centering control; estimate the road surface resistance moment of the car; according to the road surface resistance moment, calculate the energy that the booster motor needs to provide when the steering wheel of the car is returned to the centering, and calculate the power from this The motor needs to provide the auxiliary backing torque; finally, according to the vehicle speed information and the backing torque information, the vehicle speed correlation coefficient and the steering wheel correlation coefficient are obtained to correct the auxiliary backing torque. The present invention improves the return performance of the electric power steering device without affecting the driver's manipulation feel and without increasing the number of required sensors.
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Description

technical field

[0001] The present invention designs the technical field of electric power steering systems, and in particular relates to a method and a device for returning positive control of an electric power steering system for vehicles. Background technique

[0002] The electric power steering system (EPS) of a vehicle is usually composed of a torque sensor, a vehicle speed sensor, an electronic control unit (ECU), a booster motor, a worm gear reducer, and a rack and pinion steering gear. The working principle of the electric power steering system is to detect the steering wheel angle and the steering torque acting on the steering wheel through the angle sensor and torque sensor installed on the steering column. The control algorithm generates the corresponding assist torque to assist the driver in turning the steering wheel.

[0003] When a vehicle equipped with an electric power steering device is turned, the presence of the booster motor and the worm gear reducer in...

Claims

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