Method for predicting size of acceleration condition in-vehicle noise contribution

A technology that accelerates working conditions and contributes, and is applied in the field of detection systems in the field of automotive engineering technology. It can solve problems such as error-prone and low efficiency, and achieve the effect of reducing the amount of calculation, simple and fast methods, and improving processing efficiency.

Inactive Publication Date: 2017-08-01
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Problems solved by technology

[0006] However, when using the existing transfer path analysis method, the user needs to analyze each transfer path in turn, and needs to compare the magnitude of the noise contribution on each path at each frequency to identify its contribution, which is A very cumbersome process, inefficient and error-prone

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  • Method for predicting size of acceleration condition in-vehicle noise contribution
  • Method for predicting size of acceleration condition in-vehicle noise contribution
  • Method for predicting size of acceleration condition in-vehicle noise contribution

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0037] Such as figure 1 and figure 2 As shown, the method for predicting the contribution of vehicle interior noise under acceleration conditions according to an embodiment of the present invention includes the following steps:

[0038] Step S1, measure the vibration source and its transmission path that generate the noise in the vehicle to obtain a noise fitting model. The specific process of this step is as follows:

[0039] Step S11, subjectively judging the working condition of the problem. First of all, the subjective evaluatio...

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Abstract

The invention discloses a method for predicting the size of acceleration condition in-vehicle noise contribution. The method comprises the following steps that a vibration source generating in-vehicle noise and the transfer path thereof are measured so as to obtain a noise fitting model; and the excitation source or the transfer function in the noise fitting model is modified so as to predict the size of contribution of the corresponding noise excitation source or the transfer function on the in-vehicle noise. The in-vehicle noise model is established by using the measured acceleration excitation source and the noise transfer function thereof and correlation analysis is performed on the relevant excitation source, the path transfer function and the noise frequency band to determine the strongly correlated vibration source of the in-vehicle noise and the path transfer function thereof so as to perform troubleshooting, and the method is simple and rapid, the computing burden can be substantially reduced and the processing efficiency can be enhanced.

Description

technical field [0001] The invention relates to a detection system in the technical field of automobile engineering, in particular to a method for predicting the amount of noise contribution in the vehicle under acceleration conditions. Background technique [0002] The engine power of early cars was very low, and they were only driven at low speeds on urban roads, so the problems of noise and vibration were not prominent, but now, due to the popularity of highways, the increase of engine power and the increase of vehicle speed, noise, vibration and rough sound The problem of noise, vibration and Harshness (NVH) is becoming more and more prominent. [0003] Therefore, the quality of NVH has gradually become an important factor for people to buy cars. According to relevant statistics, about 1 / 3 of all customer dissatisfaction issues are related to NVH, and about 1 / 5 of after-sales service is related to NVH. Among them, the loud noise in the vehicle under acceleration condit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00G01M17/007G06F17/50
CPCG01H17/00G01M17/007G06F30/15G06F30/367Y02T90/00
Inventor 李智明殷金祥李令兵程金英刘志鹏赵明斌
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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