Method, device and realization device of acquiring excitation load

A load and uneven road surface technology, applied in the direction of measuring devices, vehicle testing, machine/structural component testing, etc., can solve the problems of high load frequency limit, low research and development efficiency, high cost, etc., and achieve the effect of reducing complexity

Inactive Publication Date: 2019-02-15
北京长城华冠汽车技术开发有限公司
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Problems solved by technology

In the reliability test of the vehicle, a sextant can be used to detect the wheel center force on the vehicle, and the wheel center force can be used as the road surface excitation load; the excitation frequency of the road surface excitation load that can be obtained in this method can reach up to about 40Hz, and The upper limit of the load frequency required in road noise analysis and NVH performance development is high (usually around 200Hz), so it is impossible to use a sextant to obtain road surface excitation loads in road noise analysis and NVH performance development
[0003] At present, the road excitation load acquisition methods used in road noise analysis and NVH performance development mainly include the direct method and the inverse matrix method; the direct method is to directly measure the roughness (vertical displacement) of the actual road surface as the excitation load. The unevenness of the road surface is directly scanned by laser detecti

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  • Method, device and realization device of acquiring excitation load
  • Method, device and realization device of acquiring excitation load
  • Method, device and realization device of acquiring excitation load

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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037]At present, the existing way to obtain road surface excitation load is relatively complicated and costly. Based on this, the embodiment of the present invention provides a method, device and implementation device for road surface excitation load, which can be applied to road vibration and noise simulation analysis and NVH performance development and other fields.

[0038] In o...

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Abstract

The invention provides a method, a device and a realization device of acquiring road excitation load. The method can be applied to the analysis of a vehicle's NVH performance, including acquiring roadparameters such as road grade and frequency range to be analyzed. According to road grade, the corresponding power spectral density function of road surface is selected. And according to the frequency range to be analyzed and power spectral density function, the device acquires road excitation load, including the frequency domain spectrum of road roughness. The invention reduces the cost and thecomplexity of acquiring road excitation load.

Description

technical field [0001] The invention relates to the technical field of road vibration and noise analysis, in particular to a method, device and realization device for acquiring road surface excitation load. Background technique [0002] The road excitation load can be used as an input parameter for road vibration and noise simulation analysis and NVH (Noise, Vibration, Harshness, noise, vibration and acoustic roughness) performance development of vehicles; the frequency domain spectrum of road surface roughness can be used as a kind of road excitation load way of expression. In the reliability test of the vehicle, a sextant can be used to detect the wheel center force on the vehicle, and the wheel center force can be used as the road surface excitation load; the excitation frequency of the road surface excitation load that can be obtained in this method can reach up to about 40Hz, and The upper limit of the load frequency required in road noise analysis and NVH performance ...

Claims

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Application Information

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IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 樊红光
Owner 北京长城华冠汽车技术开发有限公司
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