Study on Method of Noise Source Identification in Fuel Cell Vehicles

Abstract:

Based on wavelet packet transformation(WPT)and Euclidean space theory,a method was explored to identify noise source under the non-stationary conditions.Taken the condition that the fans in fuel cell vehicle(FCV)accelerated from 1000rpm to 3800rpm as example,this method was introduced and proved to be effective by identifying the main noise source both inside and outside of FCV,and the main vibration source in the position of front seat.So it can be applied in indentifying the main noise source in automotive un-stationary conditons such as acceleration conditions,deceleration conditions,and so on.

Key words:noise source identification; wavelet analysis and wavelet packet technology; non-steady-state conditions; fuel cell vehicle