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Braking noise evaluation method combining subjective evaluation and objective test

A subjective evaluation and noise evaluation technology, applied in vehicle testing, machine/structural component testing, measurement of ultrasonic/sonic/infrasonic waves, etc. Effect

Active Publication Date: 2021-06-15
HOZON NEW ENERGY AUTOMOBILE CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0003] At present, the evaluation of brake noise is mostly carried out through subjective evaluation. Since the subjective evaluation process is greatly affected by the evaluator's personal factors, it cannot completely objectively reflect the actual level of a certain car.

Method used

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  • Braking noise evaluation method combining subjective evaluation and objective test
  • Braking noise evaluation method combining subjective evaluation and objective test
  • Braking noise evaluation method combining subjective evaluation and objective test

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Experimental program
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Embodiment

[0030] combine figure 1 , to describe this embodiment in detail. The brake noise evaluation method involving subjective evaluation and objective test involved in this embodiment includes a subjective evaluation process, an objective test process and a weighted evaluation of brake noise.

[0031] The subjective evaluation process includes subjective scoring, determination of VER value and calculation of SNI value.

[0032] Subjective scoring refers to the subjective scoring of the vehicle brake noise by testers on a scale of 1-10. The corresponding relationship of the brake noise corresponding to the subjective score is: 1 is very poor, 2 is poor, 3 is not good, 4 is fair, 5 is acceptable limit, 6 is acceptable, 7 points 8 points are good, 9 points are very good, and 10 points are excellent. And in the subjective scoring, 1 to 5 points are unacceptable, and 6-10 points are acceptable. See Table 1 for details:

[0033] Table 1 Scoring criteria for brake noise test

[0034]...

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Abstract

The invention discloses a braking noise evaluation method combining subjective evaluation and objective test. The method comprises a subjective evaluation process, an objective test process and braking noise weighting evaluation. The subjective evaluation process comprises subjective scoring, VER value determination and SNI value calculation; and the objective test process comprises a braking noise intensity test and a braking scream intensity test. According to the braking noise initiative evaluation method, the AVG score of braking noise is objectively tested and calculated according to a subjective evaluation process. Compared with a traditional subjective evaluation scoring method for automobile braking noise, the evaluation method of the invention integrates objective tests for the sound pressure level and the braking scream in the braking process on the basis, and improves the evaluation method in combination with a large amount of actual measurement data. And meanwhile, subjective evaluation and objective test results are fused by utilizing an interpolation method, and finally, the braking noise is relatively perfectly evaluated by utilizing a centesimal system, so that the braking noise can be perceived and evaluated more intuitively.

Description

technical field [0001] The invention relates to the technical field of automobile noise evaluation, in particular to a braking noise evaluation method combining subjective evaluation and objective test. Background technique [0002] Braking noise is usually the sound produced by the vibration of various parts of the brake induced by the friction vibration of the friction surface of the brake, and the frequency is usually between 500Hz and 5000Hz. With the continuous upgrading of the automobile consumer market, users have higher and higher requirements on the noise level during braking. How to evaluate and benchmark the noise of automobiles during braking is becoming more and more important in the field of automotive NVH. English abbreviation for noise, vibration and harshness (Noise, Vibration, Harshness). This is a comprehensive question to measure the quality of car manufacturing, and it gives car users the most direct and superficial feeling. The NVH problem of vehicles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G01H17/00
CPCG01M17/007G01H17/00
Inventor 杨少华张永吴继辉
Owner HOZON NEW ENERGY AUTOMOBILE CO LTD
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