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.
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[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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