The Research Of The Rolling Bearing Fault Diagnosis Method Based On Wavelet Analysis

Rolling bearing is one of the most familiar components of the equipments.Its running states will affect the whole machine's function.The fault principle and the fault vibration property were analyzed in this paper.The means of vibration signal analysis and fault diagnosis of the rolling bearing were also introduced.Excellent effects can not be abtained by using regular Fourier analyzing the nonstationary vibration signals produced by the wrong rolling bearing. The wavelet analysis method,which can analyze the signals both in time and frequency domains,is suitable to the fault diagnosis of the rolling bearing.The wavelet analysis was introduced.This paper proposed two new methods which applied wavelet analysis to fault diagnosis——time domain analysis method based on wavelet packet transform and energy spectrum analysis method based on wavelet packet transform.The experiments on the actual test table showed that the two proposed methods attained a satisfactory effect. WAN Lianghong(Control theory and engineering) Directed by prof. Liu Yibing...