Fault localization method based on resonance demodulation beamforming for rolling bearings
The traditional analytical method suffers such problems as confusing localization and poor accuracy,when the loca-tion of the rolling bearings'high-frequency faults is identified.In this article,a fault-localization method is proposed,based on resonance demodulation beamforming,which is specially designed for rolling bearings.Efforts are made to extract the low-fre-quency signals with the fault information from the high-frequency carrier wave through resonant demodulation of the bearing-fault signals;then,the frequency band with the fault information for localization is selected,with the help of the near-field beamform-ing algorithm.It realizes the localization of the high-frequency bearing-fault impact signal with larger microphone spacing and ef-fectively overcomes the traditional localization method's shortcomings.Through the experiments on the bearing-fault test bench,it is verified that this method is accurate.The results show that this method's accuracy in localization remains above 95％and both the state of the bearing and its fault type can be identified.
万方数据
维普
