Automobile electric power steering friction compensation control method

An electric power steering and friction compensation technology, which is applied to automatic steering control components, electric steering mechanisms, steering mechanisms, etc., can solve the problem of not considering the influence of the friction torque of the steering system, and solve the dynamic and static friction compensation problems of electric power steering. Solve the effect of changing system friction torque

Inactive Publication Date: 2016-02-03
CHANGCHUN UNIV OF TECH
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Problems solved by technology

[0004] Patent CN103935395A proposes an adaptive friction compensation method for the electric power steering system, which automatically determines the friction compensation control current for a driving cycle based on the characteristics of the steering system, which can compensate the dynamic and static friction torque of the steering system, but does not consider the impact of the electric power steering power gain on the steering system The effect of friction torque

Method used

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  • Automobile electric power steering friction compensation control method
  • Automobile electric power steering friction compensation control method
  • Automobile electric power steering friction compensation control method

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Embodiment Construction

[0025] The present invention is described in detail below in conjunction with accompanying drawing:

[0026] refer to figure 1 When the driver manipulates the steering wheel 1 to turn, the torque sensor 2 detects the driver's steering torque, the vehicle speed sensor 4 detects the vehicle speed, and the electric power steering controller 3 determines the target of the power assist motor 7 according to the torque sensor and the vehicle speed. Control the current, the current sensor 6 detects the actual current signal of the booster motor 7, and the electric power steering controller 3 determines the motor armature applied to the booster motor 7 through PID closed-loop control based on the deviation between the target current of the booster motor and the actual current signal Voltage 5 controls the torque and direction of rotation of the power assist motor 7. The motor torque is amplified by the motor reducer 8 and acts on the steering drive shaft as the motor assist torque. The...

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Abstract

The invention discloses an automobile electric power steering friction compensation control method. The method comprises the steps that an electric power steering controller calculates the friction compensation torque according to a motor angular velocity signal, the friction compensation torque serves as one part of the electric power steering assistant torque, and joint compensation of kinetic friction torque and static friction torque of an electric power steering system is achieved; when an electric power steering assist gain changes, friction compensation control of a constant amplitude enables a driver to feel that the steering system friction changes, and a road feeling blur of subjective evaluation is caused. The friction compensation control method based on the electric power steering assist gain is proved, it is guaranteed that under different assist gains, the driver can obtain almost the same friction feeling, and the influence of the electric power steering assist gain on the system friction torque is eliminated.

Description

technical field [0001] The present invention relates to a friction compensation control method for automobile electric power steering system, more specifically, it relates to a kind of friction compensation capable of compensating dynamic and static friction torque of electric power steering system and obtaining the same friction feeling under different boosting gains Control Method. Background technique [0002] As the product of the combination of electronic technology and steering system, electric power steering closely follows the three major themes of the development of the automobile industry. While providing power assistance and reducing the driver's manipulation burden, it can also improve the steering performance of the car. There is a tendency to gradually replace hydraulic power steering, and has broad application prospects. The electric power steering system adds a motor and a reduction mechanism on the basis of the original mechanical system, which increases th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04B62D6/00B62D101/00B62D119/00
Inventor 李绍松牛加飞卢晓晖于志新盛任郑顺航王浩任张增帅
Owner CHANGCHUN UNIV OF TECH
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