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Detecting method for full wheel driven electric driving vehicle movement parameter

An all-wheel drive, motion parameter technology, used in vehicle testing, machine/structural component testing, measurement devices, etc., to solve problems such as high cost, failure, and integrator overflow

Inactive Publication Date: 2007-10-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that an acceleration sensor or GPS device needs to be installed, and the cost is very high; there is a high requirement for the filtering of the longitudinal acceleration signal, otherwise it will easily cause the integrator to overflow and fail

Method used

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Examples

Experimental program
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Embodiment Construction

[0026] In the test method for the motion parameters of the all-wheel drive electric drive vehicle proposed by the present invention, the motion parameters to be tested include the wheel slip rate and the vehicle speed.

[0027] First measure the rotational speed ω of all wheels separately i , and then obtain the rate of change of all wheel speeds respectively ; Obtain the output torque value T of the driving motors of all wheels from the motor driver or torque sensor of the vehicle i ;according to the above rate of change and output torque value T i , calculate the ground longitudinal force F obtained by each wheel di , the calculation formula is: F di = T i - J ω · i r , where r is the radius of the wheel; ...

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Abstract

A method for testing movement parameter of electrically driven vehicle in all wheel driving type includes using wheel speed and motor torque signals to calculate ground longitudinal force and vehicle speed, using rotary speed and track-slip rate as well as drift rate of non-steering wheel to present vehicle speed, calculating out track-slip rate of non-steering wheel by integration calculation in order to reverse-derive out vehicle speed then calculating track-slip rate of steering wheel.

Description

technical field [0001] The invention relates to a test method for motion parameters of an all-wheel drive electric drive vehicle, belonging to the technical field of electric drive vehicle control. Background technique [0002] As a new type of vehicle developed under the increasing environmental pressure, electric drive vehicle has become one of the research focuses in the automotive industry. All-wheel electric drive vehicle slip rate, slip rate (it is called slip rate when the wheel is driving, and it is called slip rate when the wheel is braking) and the vehicle speed are calculated by all-wheel drive electric drive vehicle for driving control One of the key technologies needed. For all-wheel electric drive vehicles, there is no public calculation method for slip rate, slip rate and vehicle speed. [0003] There are two main methods for calculating the slip rate, slip rate, and vehicle speed of traditional all-wheel drive vehicles. One of the methods is to first measur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G01P3/00
Inventor 罗禹贡邹广才李克强连小珉杨殿阁郑四发王建强
Owner TSINGHUA UNIV
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