Order sudden peak magnitude-based method for quantitatively evaluating whistler-type noise of AT transmission gear

A technology for quantitative evaluation of transmission gears, applied to the measurement of ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc., which can solve problems such as difficulty in setting goals in the early stage and misjudgment in evaluation

Inactive Publication Date: 2017-07-18
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for quantitatively evaluating the whistling noise of AT transmission gears based on the amount of order spikes, which can solve the problems of misjudgment of evaluation and difficulty in setting goals in the early stage due to individual differences among evaluators in subjective evaluation

Method used

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  • Order sudden peak magnitude-based method for quantitatively evaluating whistler-type noise of AT transmission gear
  • Order sudden peak magnitude-based method for quantitatively evaluating whistler-type noise of AT transmission gear
  • Order sudden peak magnitude-based method for quantitatively evaluating whistler-type noise of AT transmission gear

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Such as image 3 As shown, the specific implementation process of this method is as follows:

[0024] First, confirm and check the vehicle status to ensure that it meets the test status. The test is required to be carried out in an anechoic chamber with two-wheel drive or four-wheel drive hub, on a smooth and straight asphalt road. Dust, sand and stones, and no other debris such as scattered debris, the wind speed is not greater than 5m / s, and the vehicle is in good condition.

[0025] then press as figure 1 As shown, the four noise microphones are respectively placed at the right ear positions of the driver, co-pilot, and rear left and right passengers, ensuring that the distance between the four microphones and the vertical position of the seat back is about 10 cm; a photoelectric sensor is arranged to collect the noise of the transmission sh...

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Abstract

The invention relates to an order sudden peak magnitude-based method for quantitatively evaluating whistler-type noise of an AT transmission gear. According to the method, the fact that the subjective evaluation sensitiveness of human on the whistler-type noise is not only greatly affected by the magnitude of whistler, but also closely related to background noise according to analysis on the whistler-type noise spectrum of an AT vehicle transmission and the research on sound mask effect, so that the method is proposed. The method quantitatively evaluates the whistler level of a gear through the difference value between the order noise of the AT transmission gear and the background noise, and can objectively and accurately reflect the evaluation acceptability to the whistler-type noise of the AT transmission gear by a user. The scheme solves the problems of evaluation misjudgment caused by the individual difference of evaluating personnel and difficulty in setting of an early-stage target in subjective evaluation.

Description

technical field [0001] The invention belongs to the field of automobile NVH (Noise Vibration Harshness, noise vibration and harshness), in particular to a method for quantitatively evaluating the whistling noise of AT transmission gears based on order spikes. Background technique [0002] Car users not only require low noise in cars, but also increasingly pursue sound quality. The sound pressure level of car interior noise can no longer reflect the quality of car comfort, and the sound quality of car interior noise is becoming more and more important. , The howling noise of the transmission system gear of the AT transmission has a very significant impact on the sound quality in the car. At present, there is no good objective evaluation index for the evaluation of AT transmission gear whine noise, so people usually use subjective evaluation to determine the severity of whine noise qualitatively, but everyone feels differently about the sound. Different people may get differe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 胡成太杨亮李宏成杨宪武庞剑夏元烽徐小敏马东正
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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