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Noise contribution analysis method

An analysis method and contribution technology, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of high test equipment requirements, difficult measurement, low test efficiency, etc., to reduce test development costs, reduce The effect of small demand, easy promotion and application

Active Publication Date: 2021-11-02
XIANGYANG DAAN AUTOMOBILE TEST CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005]Aiming at the defects existing in the prior art, the purpose of the present invention is to provide a method for analyzing the contribution of passing noise, which can solve the problem of high requirements for testing equipment in the prior art, Difficulty in measurement and low test efficiency

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Embodiment Construction

[0040] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0041] The present invention provides an analysis method of pass-by noise contribution. When using the pass-by noise contribution analysis method, the acoustic load of the main noise component can be equivalent to the secondary noise component through only a small number of microphones. The transfer function from the secondary noise com...

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Abstract

The invention relates to the technical field of automobile noise detection, and in particular, relates to a noise contribution analysis method, wherein the method comprises the following steps: acquiring test sound pressure of a target sound source position and an indication sound source position on each main noise part, local functions from each main noise part to the corresponding target sound source position and indication sound source position, and a global function from each secondary noise component to a response point; determining the acoustic load of each main noise component according to the test sound pressure and the local transfer function; according to the acoustic load of each main noise component and the equivalent correction function, obtaining an equivalent acoustic load of each main noise component equivalent to the secondary noise component; and according to the equivalent acoustic load and the global transfer function, solving the acoustic contribution of each sound source noise component under a set octave. The problems of high requirements on test equipment, high measurement difficulty and low test efficiency in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of automobile noise detection, in particular to a method for analyzing contribution of passing noise. Background technique [0002] How to reduce the external noise of key systems in the development process of automobile NVH is the key to the acceleration and passing noise. Contribution size. Commonly used methods for contribution analysis include element elimination method (sorting key system contributions by wrapping, leading away, and blocking), sound source identification methods based on acoustic arrays, and transmission path contribution analysis methods based on time domain or frequency domain. . The main purpose of these contribution analysis methods is to separate the noise contribution of the key system from the total acceleration noise, and analyze its main contribution source spectrum components, and then improve the acceleration noise outside the vehicle according to the analysis and evaluatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00G01M17/007
CPCG01H17/00G01M17/007Y02T90/00
Inventor 黎术吴兵严辉康润程梁涛
Owner XIANGYANG DAAN AUTOMOBILE TEST CENT
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