Vehicle transmission path obtaining method and device

A technology of transmission path and acquisition method, which is applied in the field of vehicle transmission path acquisition to achieve the effect of avoiding over-design, reducing the weight of the whole vehicle and reducing the cost.

Active Publication Date: 2017-03-08
SAIC MOTOR
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Problems solved by technology

[0005] The problem solved by the embodiments of the present invention is how to quickly

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  • Vehicle transmission path obtaining method and device
  • Vehicle transmission path obtaining method and device
  • Vehicle transmission path obtaining method and device

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Embodiment Construction

[0035] In the prior art, when using the transmission path analysis method, the user needs to analyze each transmission path in turn to obtain the contribution of each transmission path to the noise in the vehicle. However, in practical applications, the number of transmission paths is large, the workload is large, the efficiency is low, and errors are prone to occur.

[0036] In the embodiment of the present invention, the first difference curve between the noise in the vehicle and the target noise value, and the second difference curve between the noise signal in the vehicle and each transmission path are obtained. According to the first difference curve and the second difference curve, the difference between the first difference curve and the second difference curve at the same frequency point can be obtained, and the difference between the first difference curve and the The corresponding preset threshold value is compared, and the difference value of the second difference curv...

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Abstract

The invention discloses a vehicle transmission path obtaining method and device, and the method comprises the steps: obtaining an in-vehicle noise signal, and carrying out the transmission path analysis of the in-vehicle noise signal; solving the difference between the amplitude value of the in-vehicle noise signal and a target noise value corresponding to the same frequency point, and obtaining a first difference curve; solving the difference between the amplitude of the in-vehicle noise signal and the noise amplitude value generated by each transmission path corresponding to the same frequency point, and obtaining a second difference curve; and obtaining the contribution coefficient of the transmission path corresponding to the frequency point according to the relation between the differences, corresponding to the same frequency point, of the first and second difference curves and the corresponding preset threshold values. The method and device can quickly obtain the contribution of each transmission path to the whole in-vehicle noise.

Description

Technical field [0001] The invention relates to the field of automobiles, and in particular to a method and device for obtaining a vehicle transmission path. Background technique [0002] In recent years, with the rapid development of the automotive industry, people have higher and higher requirements for vehicle noise, vibration, and harshness (NVH) performance. The low noise in the vehicle has become a vehicle development issue. important topic. [0003] In order to avoid discovering and repairing problems such as vibration and noise after the development of the car is completed, the transmission path analysis method is usually used to analyze the noise in the car during the development of the car. Through the transmission path analysis method, the contribution of each transmission path to the noise in the entire vehicle can be obtained. [0004] However, when using the existing transmission path analysis method, the user needs to analyze each transmission path in turn. When the ...

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Application Information

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IPC IPC(8): G01M7/02G01M17/007
Inventor 饶建渊靳春梅姚斌辉刘飞邱优峰韩亮
Owner SAIC MOTOR
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