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Automobile electric power-assisted steering system simulation testing arrangement

A technology of electric power steering and testing equipment, which is applied in the direction of vehicle steering/bumping performance, etc. It can solve the problems of unadjustable spring loading force and displacement curve, inability to test EPS characteristics, and inconvenient EPS debugging, etc., to achieve layout adjustment and Easy to change vehicle parameters, save money and expenses, and easy to design and manufacture

Inactive Publication Date: 2005-03-16
HUAZHONG UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

This method has the advantages of simple and reliable mechanism, but its disadvantages are also obvious. The change curve of spring loading force and displacement cannot be adjusted, and there is a large gap with the reaction force of the wheel to the steering wheel when the actual vehicle is running.
Therefore, this method cannot simulate the resistance of the wheels to the steering gear when the actual vehicle is running, and it is not convenient for the debugging of the EPS control strategy
It is even impossible to test the characteristics of EPS

Method used

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  • Automobile electric power-assisted steering system simulation testing arrangement
  • Automobile electric power-assisted steering system simulation testing arrangement
  • Automobile electric power-assisted steering system simulation testing arrangement

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Embodiment Construction

[0022] The invention adopts a servo motor instead of a spring, and uses a set of control system to control the excitation current of the servo motor, thereby changing the reaction force exerted by the servo motor on the steering wheel through the steering output shaft. By studying the movement rules of the car, a mathematical model of the resistance of the wheels to the steering mechanism is established during the movement of the car. The computer calculates the resistance of the wheels according to the vehicle speed, wheel deflection angle, vehicle model and parameters, and outputs an excitation control signal to the servo motor. The amount of resistance output from the servo motor to the EPS output shaft. Through the simple setting and adjustment of the parameters of the simulation software, it can adapt to the requirements of various types of EPS.

[0023] This method can simulate the resistance of the wheels to the steering wheel when the vehicle is running according to th...

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Abstract

This invention discloses an artificial apparatus of mobile booster steering system which is servo-motor used to mock the resistance force the mobile exerts on the output axis of the steering and to transmit the torque signals to the data collection card. The servo motor controller is connected with the data collection card, which is used to control the torque of the resistance servomotor. The current sensor is used to measure the motor current of the EPS, and provide a proportional voltage signals to the motor current for the data collection card. The angle sensor locates on top of the steering wheel and is used to measure the angle of the wheel and provide angle signals to the data collection card. The computer collects and transmits control orders through the data collection card and processes the data and gets the measurement results.

Description

technical field [0001] The invention belongs to the technical field of vehicle engineering testing equipment, and in particular relates to a simulation testing device for an electric power steering system of an automobile. Background technique [0002] Electric Power Steering System (EPS: Electric Power Steering System) is a steering system that directly relies on the motor to provide assist torque. This system is different from the traditional hydraulic power steering system (HPS: Hydraulic Power Steering System) and electronically controlled hydraulic power steering system (ECPS: Electronically Controlled Power Steering System), it does not require complicated mechanical and hydraulic control, but according to micro The processor collects the speed of the car and the magnitude of the driver's operating torque to control the magnitude and direction of the current of the assist motor, so as to achieve the purpose of assisting the steering wheel of the car. This method can p...

Claims

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Application Information

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IPC IPC(8): G01M17/06
Inventor 唐小琦赵国庆李新华金国栋
Owner HUAZHONG UNIV OF SCI & TECH
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