Method for self-adaptation frictional compensation of electric power steering system and electric power steering system
An electric power steering and friction compensation technology, which is applied to electric steering mechanisms, automatic steering control components, steering mechanisms, etc., can solve problems such as overcompensation, poor steering feel, and insufficient compensation
Active Publication Date: 2014-07-23
AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG +1
View PDF7 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Therefore, using the friction compensation calculated by a single torque or given a constant friction compensation may cause insufficient compensation or over compensation, resulting in poor steering feel.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] The present invention will be further described below in conjunction with the accompanying drawings.
[0024] Such as figure 1 As shown, the electric power steering system of the present invention calculates the currently required power assist current value by detecting the torque signal of the driver acting on the steering wheel and combining the vehicle speed signal, and calculates the friction compensation current value through the friction compensation method I friction , and then the assist current value and the friction compensation current value I friction The final target current value I is obtained by addition aim , at the same time, detect the actual current of the motor as the feedback current, the feedback current value and the target current value I aim The error current value is obtained after subtraction, and the error current value is calculated by the PID algorithm to obtain the control voltage of the motor, and then control the assist motor to provi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for self-adaptation frictional compensation of an electric power steering system and the corresponding electric power steering system. According to the electric power steering system, a current required power-assisted current value is worked out by detecting a torque signal which a driver acts on a steering wheel and combining the torque signal with a vehicle speed signal, a frictional compensation current value Ifriction is worked out through the method for friction compensation, then the addition operation is carried out on the power-assisted current value and the frictional compensation current value Ifriction to obtain a final target current value Iaim, and the target current value Iaim controls a power-assisted motor to provide power-assisted torque. According to the method for self-adaptation frictional compensation of the electric power steering system, the frictional compensation current value of each driving period can be calculated in a self-adaptation mode, the influence, caused when the vehicle using and climatic environment changes, on the friction changes inside the electric power steering system can be effectively eliminated, and a health consultation can be carried out on the electric power steering system according to the calculated frictional compensation current value.
Description
technical field [0001] The invention mainly relates to an adaptive friction compensation method of an electric power steering system of an automobile and the electric power steering system. Background technique [0002] Because the electric power steering system has the advantages of variable power characteristics, energy saving, and simple structure, it is gradually replacing the traditional hydraulic power steering system in the field of small and medium-sized cars. [0003] The electric power steering system is formed by adding a power auxiliary device (namely motor and reducer device) on the basis of the traditional mechanical steering system, which increases the friction of the entire steering system and affects the steering feel and steering return performance. A friction compensation function is added to the electric power steering system to improve steering feel. [0004] Patent CN1652960A discloses a method of friction compensation, which uses the sum of the rated ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): B62D5/04B62D6/00B62D101/00B62D119/00
Inventor 吕英超吕艳博成建明蒙天斌
Owner AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG