Automobile inertial parameter measurement test bed and automobile inertial parameter dynamic calculation method

An inertial parameter and test-bed technology, applied in the field of measurement, can solve problems such as complex measurement procedures, complex pitch and yaw drive mechanisms, and inability to calculate inertia products.

Active Publication Date: 2014-02-19
KH AUTOMOTIVE TECH CHANGCHUN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The automobile inertia parameter measurement test bench in the prior art, U.S. Patent US005177998A discloses a kind of automobile center of mass and moment of inertia measurement device, adopts the principle of " compound pendulum " to measure, the structure is huge, the measurement procedure is complicated, can calculate the center of mass height, Roll/pitch/yaw

Method used

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  • Automobile inertial parameter measurement test bed and automobile inertial parameter dynamic calculation method
  • Automobile inertial parameter measurement test bed and automobile inertial parameter dynamic calculation method
  • Automobile inertial parameter measurement test bed and automobile inertial parameter dynamic calculation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The electric tilting cylinder 31 drives the motion platform system 5 in the initial state of zero degree, α 1 degree and alpha 2 degrees, small-amplitude sinusoidal motion is performed, and the force vector F measured by the roll single-component force sensor 411 1 and the force vector F measured by the pitch and yaw two-component force sensor 412 2 , F 3 , respectively find the mean value of the pitching balance torque at zero degree roll alpha 1 Average value of balance torque and roll α 2 Average value of balance torque

[0077] The solution equation for the position coordinates of the center of mass is:

[0078] - mg 0 0 0 mg cos α ...

Embodiment 2

[0081] Using the pitch initial state as degrees, zero degrees and The small-amplitude sinusoidal motion is carried out respectively at degrees, and the pitch Average value of balance torque Mean value of roll balance torque at zero degree and pitch Average value of balance torque The solution equation for the position coordinates of the center of mass is:

[0082]

Embodiment 3

[0084] Using the roll initial state α 1 degree and alpha 2 Perform small-amplitude sinusoidal motions at each degree, and find the average value of the balance torque with calculate y α 、h α ;use pitch initial state Degree and Perform small-amplitude sinusoidal motions to obtain the average value of the balance torque with Calculate ;Using the yaw initial state of zero degree to perform small-amplitude sinusoidal motion, and find the average value of the balance torque with calculate x θ 、y θ ;

[0085] The solution equation for the position coordinates of the center of mass is:

[0086] 0 mg cos α 1 - mg sin α 1 ...

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Abstract

The invention discloses an automobile inertial parameter measurement test bed and an automobile inertial parameter dynamic calculation method. The automobile inertial parameter measurement test bed comprises a supporting system, a loading system, a measuring system, a movement platform system and a control calculation system. The supporting system supports an automobile to be measured and the loading system. Three electric cylinders of the loading system drive the movement platform system, so that the movement platform system rotates around the X axis, the Y axis and the Z axis respectively. The measuring system measures the rotating angles and the driving force of the automobile to be tested under different movement working conditions. The control calculation system drives the loading system to load the automobile to be measured, collects signals obtained by the measuring system, and calculates the signals. According to the automobile inertial parameter measurement test bed and the automobile inertial parameter dynamic calculation method, a unique double-hinged-fork mechanism is adopted to transmit the driving force of the electric cylinders in the process of pitching movement or yaw movement, and the inertial parameters of the automobile are dynamically solved through sinusoidal motion. The automobile inertial parameter measurement test bed has the advantages of being simple in structure, low in cost and high in measurement precision.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to an automobile inertia parameter measurement test bench for measuring automobile inertia parameters and a dynamic calculation method for solving inertia parameters. Background technique [0002] The inertia parameters of the car include the mass of the vehicle, the position coordinates of the center of mass, the moment of inertia and the product of inertia, which have a crucial impact on the power, ride comfort, fuel economy, obstacle avoidance ability and maneuverability of the car, and the stability of the car and anti-rollover performance play a decisive role; inertia parameters are important parameters in vehicle dynamics simulation and control, in order to improve the accuracy of the established vehicle dynamics model, more accurate values ​​of vehicle inertia parameters are needed. [0003] Automobile inertial parameter measurement test bench is a test equipm...

Claims

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Application Information

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IPC IPC(8): G01M1/10G01M1/00
Inventor 郭孔辉丁金全郭川姚麒麟陈禹行许男李忠岩袁显举
Owner KH AUTOMOTIVE TECH CHANGCHUN
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