Prediction method for subjective scoring on interior noise during vehicle acceleration

A technology for in-vehicle noise and prediction methods, applied in vehicle testing, machine/structural component testing, measuring devices, etc., can solve the problem of large human and material cost, large deviation, identification or performance comparison reference problems such as decline, to achieve the effect of strong reference and reduced uncertainty

Active Publication Date: 2018-12-18
SAIC MOTOR
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Problems solved by technology

[0002] At present, the penetration rate of automobiles is already very high. With the continuous development of automobile technology, the acceleration performance of automobiles is getting better and better. However, during the acceleration of automobiles, the high-speed rotation of the engine will inevitably produce noise; Evaluation, the existing method is mainly to carry out noise evaluation by driving the vehicle subjectively, whic

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  • Prediction method for subjective scoring on interior noise during vehicle acceleration
  • Prediction method for subjective scoring on interior noise during vehicle acceleration
  • Prediction method for subjective scoring on interior noise during vehicle acceleration

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Embodiment 1

[0068] Take the normalized speed △n r =300 r / min, the speed interval of the speed-up engine is 25r / min, the following calculation speed is n=2100r / min, △n k1 =50r / min normalized noise kurtosis, 50 r / min as the step size.

[0069] It can be obtained from Table 3 that when the speed is n=2100r / min, the sound pressure level is 67.54, and the speeds of the two extended speed points are 2125r / min and 2075r / min, respectively, and the corresponding sound pressure levels are 67.99 and 65.36 respectively.

[0070] A n The point noise kurtosis F nk =[ L pn -½ (L pn-½△nk + L pn+½△nk )]=67.54-½*(67.99+65.36)=0.865.

[0071] A n The normalized noise kurtosis F of the points nkr =F nk / (△n k / △n r )=0.865 / (50 / 300)=5.19.

[0072] Take 50 r / min as the step size, take:

[0073] Δn k2 =100 r / min, its corresponding F nkr =4.85

[0074] Δn k3 =150 r / min, its corresponding F nkr =3.66

[0075] …

[0076] Δn k20 =1000 r / min, its corresponding F nkr =1.57

[0077] 20 normali...

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Abstract

The invention discloses a prediction method for subjective scoring on interior noise during vehicle acceleration. The method comprises the following steps of: step 1, collecting signals wherein soundpressure levels of an acceleration noise and a multi-level acceleration noise in ears change with the engine speed during the vehicle acceleration process and storing the signals; step 2, calculatinga noise kurtosis according to the current engine speed and the sound pressure level, and calculating a normalized noise kurtosis and a maximum normalized noise kurtosis through the noise kurtosis; andstep 3, calculating a subjective prediction score of the noise corresponding to different rotation speeds during the vehicle acceleration process and a total value of the subjective evaluation and prediction scores in the whole acceleration process according to the noise kurtosis, and obtaining an acceleration noise evaluation condition according to a standard scoring table. The invention adoptsthe determined objective evaluation method based on a real vehicle measurement, so that the uncertainty is greatly reduced for the traditional subjective evaluation, the problems can be quickly and accurately identified or the nuances can be compared, and the reference is high.

Description

technical field [0001] The invention relates to an acoustic / noise measurement method in the field of automobiles, in particular to a prediction method for subjective scoring of interior noise when the vehicle accelerates. Background technique [0002] At present, the penetration rate of automobiles is already very high. With the continuous development of automobile technology, the acceleration performance of automobiles is getting better and better. However, during the acceleration of automobiles, the high-speed rotation of the engine will inevitably produce noise; Evaluation, the existing method is mainly to carry out noise evaluation by driving the vehicle subjectively, which consumes a lot of manpower and material resources. At the same time, the evaluation results are affected by many influencing factors, resulting in large deviations, especially when the sample size is small. The subjective tendency will lead to a large deviation of the subjective evaluation method. The...

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Application Information

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IPC IPC(8): G01M17/007G01H17/00
CPCG01H17/00G01M17/007
Inventor 袁卫平郑建洲宋恩栋刘影王媛文石磊孙明吕宫
Owner SAIC MOTOR
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