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Position control method for sensorless steering wheel

A control method and steering wheel technology, applied to automatic steering control components, steering mechanisms, steering rods, etc., can solve the problems of increasing difficulty in marketization and increasing the cost of electric power steering systems

Active Publication Date: 2012-08-01
湖南东嘉智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] If the EPS of low-end DC brush motors is also equipped with a position (angle) sensor, this will undoubtedly increase the cost of the electric power steering system, making it more difficult to promote the marketization of EPS of DC brush motors

Method used

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  • Position control method for sensorless steering wheel

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Embodiment Construction

[0048] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0049] The speed and angular position of the motor can be calculated through the motor parameters, and after measuring the armature voltage and current, the motor rotor speed can be calculated through the traditional motor model:

[0050] (1)

[0051] (2)

[0052] (3)

[0053] in Indicates armature voltage, armature current, electromotive force constant, constant excitation flux, are the motor armature resistance and inductance, respectively, Respectively represent the counter electromotive force constant, the rotor speed of the motor, is the rotor angle and initial position of the motor.

[0054] By testing and calculating , , , energize the...

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Abstract

The invention relates to a position control method for a sensorless steering wheel. According to the position control method, continuous, smooth and stepless change of a steering ratio at different car speeds is realized by a regulation motor for controlling an ECU (Electronic Control Unit) gear ratio; meanwhile, the change rule is calculated by utilizing a correlation formula, and rotation angle compensation is carried out according to the calculated change rule; reverse steering adjustment is actively carried out during car oversteer, and the regulation motor and an assisting motor are flexibly controlled and mutually compensated so as to perfectly combine the flexibility, the portability and the control stability of the steering, so that the control performance and the safety are improved.

Description

technical field [0001] The invention relates to a method for controlling a motor of an automobile steering system, in particular to a method for controlling the position of a steering wheel without a position sensor of a DC brush motor used in an electric power steering system of an automobile. Background technique [0002] Automobile steering system is an important chassis part of the automobile, which involves the driving performance of the automobile. The performance of the steering system directly affects the steering stability of the car. It plays an important role in ensuring the safety of the vehicle, reducing traffic accidents, protecting the driver's personal safety, and reducing the driver's labor intensity. [0003] Electric power steering (also known as EPS: Electronic Power Steering) is mainly composed of a torque sensor, a vehicle speed sensor, a power assist motor, a reduction mechanism, and an ECU control unit. Generally, the size of the EPS boost is only re...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D6/00
Inventor 赵斌高明林联伟石广林
Owner 湖南东嘉智能科技有限公司
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