Online detection method for torsion vibration signal of automotive power transmission system

A technology of power transmission system and torsional vibration, which is used in vehicle testing, vibration measurement in solids, machine gear/transmission mechanism testing, etc.

Inactive Publication Date: 2010-10-27
TSINGHUA UNIV
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  • Claims
  • Application Information

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Problems solved by technology

For the rotation signal of the power transmission system under acceleration conditions, the frequency fluctuation range is wide, and it is difficult to achieve the expected effect by using traditio

Method used

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  • Online detection method for torsion vibration signal of automotive power transmission system
  • Online detection method for torsion vibration signal of automotive power transmission system
  • Online detection method for torsion vibration signal of automotive power transmission system

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Embodiment Construction

[0040] The on-line detection method of the torsional vibration signal of the automobile power transmission system proposed by the present invention comprises the following steps:

[0041](1) Install the test tooth plate on the rotating part of the power transmission system of the vehicle under test, the test tooth plate and the rotating part are fixed coaxially, and a speed sensor is fixed on the car body or the casing of the rotating part, and the speed sensor is in the test position. On the side of the gear plate, when the vehicle under test accelerates, the rotation signal of the rotating part is collected;

[0042] (2) Set at time t peak When (i) the rotation signal s(t) of the rotating part appears the i-th peak value, then the time period T(i) during which the i-th tooth corresponding to the i-th peak value on the test tooth disc sweeps the speed sensor is:

[0043] T(i)=t peak (i+1)-t peak (i)

[0044] According to the time period T(i) of the i-th tooth, the time pe...

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Abstract

The invention relates to an online detection method for a torsion vibration signal of an automotive power transmission system, and belongs to the field of automobile noise and vibration control. In the method, torsion vibration test and analysis are performed on a power transmission system of a running front-engine rear-drive independent suspension type vehicle. A testing disc and a rotating speed sensor are arranged at the tested position of the power transmission system and are used for measuring rotating signals of the power transmission system, performing self-adaptive filtering on the signals, performing time-frequency analysis on the filtered signals, and calculating the torsion vibration frequency of the system. The method is used for performing torsion test and analysis on the acceleration running working conditions of an actual vehicle, particularly the running front-engine rear-drive independent suspension type vehicle without a torsion vibration test rack. The testing disc and the rotating speed sensor are arranged at the tested position of the power transmission system and are used for measuring the rotating signals of the power transmission system, calculating the instantaneous rotating speed through the peak value detection, filtering, and calculating the torsion vibration frequency of the system through the time-frequency analysis of the filtered signals.

Description

technical field [0001] The invention relates to an on-line detection method for torsional vibration signals of an automobile power transmission system, in particular for performing torsional vibration testing and analysis on the power transmission system of a front-rear drive independent suspension vehicle, and belongs to the field of automobile noise and vibration control. Background technique [0002] The vehicle power transmission system is a complex, multi-degree-of-freedom vibration system, which is an important excitation source of vehicle vibration and noise. Among them, torsional vibration is one of the basic vibration forms of the power transmission system. For a vehicle with a front engine, rear wheel drive, and independent suspension structure, the power of the engine is transmitted to the rear of the vehicle through the transmission shaft. Due to the long distance of power transmission, the probability of torsional vibration during the transmission process increas...

Claims

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Application Information

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IPC IPC(8): G01M17/007G01M13/02G01H1/10
Inventor 郑四发郝鹏王彬星连小珉李克强杨殿阁罗禹贡王建强
Owner TSINGHUA UNIV
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