Noise evaluation method for motor rack test of new energy automobile
A noise evaluation and noise technology, applied in the direction of measuring ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc.
Inactive Publication Date: 2019-08-30
SAIC VOLKSWAGEN AUTOMOTIVE CO LTD +2
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[0003] In view of this, the purpose of the present invention is in order to overcome the defective of prior art, in order to accurately evaluate the evaluation problem of the noise of electric vehicle motor under rapid acceleration and rapid deceleration working conditions, proposes a kind of parameter based on noise order sub-sound pressure level gradient noise evaluation method
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[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.
[0018] The embodiment of the present invention provides a noise evaluation method based on noise order sound pressure level gradient parameters, and its basic implementation process is as follows:
[0019] First, calculate the sound pressure level of each order motor during the acceleration test of the motor bench, such as figure 1 As shown, where the abscissa is the motor speed, and the ordinate is the noise sound pressure level.
[0020] because figure 1 The sound pressure level curve shown cannot effectively reflect the noise change when the motor speed increases or decreases (especially during rapid acceleration and deceleration), and it is necessary to f...
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The invention provides a noise evaluation method based on noise order sound pressure level gradient parameters, which comprises the steps of: performing an acceleration test by using a motor rack, andcalculating a sound pressure level of each order motor in the acceleration test process of the motor rack; and calculating a sound pressure gradient of each order motor based on the sound pressure level of each order motor, and performing noise evaluation on the motor according to the sound pressure gradient. According to the noise evaluation method, the noise of the motor is evaluated by use ofthe sound pressure gradient of the each order motor, and the noise under the working conditions of rapid acceleration and rapid deceleration of a motor rack test of a new energy automobile can be correctly evaluated, thus the noise evaluation method has the effects of rapidness, simplicity, convenience and correctness.
Description
technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a noise evaluation method for a new energy vehicle motor bench test. Background technique [0002] During the motor bench test and the vehicle NVH road test, the test personnel of the new energy vehicle motor manufacturer and the new energy vehicle manufacturer found that the noise sound pressure level and loudness level of the motor under certain operating conditions are not calculated. However, the testers found that the subjective feeling of the noise of these motors in the process of rapid acceleration and deceleration is relatively poor. The main reason is that the motor manufacturers and automobile manufacturers have not adopted appropriate noise evaluation methods. Contents of the invention [0003] In view of this, the purpose of the present invention is in order to overcome the defective of prior art, in order to accurately evaluate the evaluati...
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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 严小俊胡冬枚曹诚胡志宏宋志环李惠彬蒋超张炟
Owner SAIC VOLKSWAGEN AUTOMOTIVE CO LTD