Method for separating speed changer knocking structure noise and air noise based on transmission path

A technology for air noise and structure noise, applied in the measurement of ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc., can solve problems such as uneconomical time periods, and achieve the best optimization effect.

Inactive Publication Date: 2012-06-27
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology

Regardless of the source of the control or the sensitivity of the control response, in practical engineering applications, it is often uneconomical and takes a long time. Therefore, for the optimization of transmission knocking noise, improving the transmission path of knocking noise has become the preferred solution

Method used

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  • Method for separating speed changer knocking structure noise and air noise based on transmission path
  • Method for separating speed changer knocking structure noise and air noise based on transmission path
  • Method for separating speed changer knocking structure noise and air noise based on transmission path

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0040] see figure 1 The method of the present invention mainly includes percussion noise collection under accelerated working conditions, vehicle sound transmission test, and separation of percussion air radiation sound and structure transmission sound.

[0041] 1. Sensor layout

[0042] Arrange the microphones at the positions of the driver and co-pilot respectively, and ensure that the distance between the microphone and the vertical position of the seat back is about 10cm, and that the microphones are at the same level; arrange the microphones at the left, right and top positions of the transmission in the engine compartment, Each position of the microphone is about 10cm away from the transmission case.

[0043] 2. Accelerated tapping noise collection

[0044] Put the vehicle into the third gear, accelerate at full throttle at 1000-4000rpm...

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Abstract

The invention discloses a method for separating a speed changer knocking structure noise and an air noise based on a transmission path. The method comprises the following steps: knocking noise acquisition under an acceleration condition, a finished automobile sound transmission function test and knocking air radiation sound and structure transmission sound separation. By using the method, sizes of the structure noise and the air noise in the speed changer knocking noise transmitted to the automobile can be objectively and accurately separated.

Description

technical field [0001] The invention belongs to an evaluation method in the field of transmission system vibration and noise. Background technique [0002] With the continuous improvement of the vibration and noise performance of automobiles, the sound pressure level of automobile interior noise can no longer reflect the quality of automobile comfort. The sound quality of interior noise is becoming more and more important. The impact of noise on the sound quality of the vehicle is particularly significant, so the study of transmission knock noise plays a vital role in improving the sound quality of the vehicle. [0003] For transmission knocking noise, it is currently mainly controlled from the aspects of excitation source, response sensitivity and transmission path. Regardless of the control source or control response sensitivity, in practical engineering applications, it is often uneconomical and takes a long time period. Therefore, for the optimization of transmission kn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
Inventor 唐禹田雄李宏成毕金亮
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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