Application of Wavelet Transform in Fault Diagnosis of Rolling Bearing

Using wavelet transform,the band-pass filter can be done fast and effectively in processing the vibration signal of rolling bearing.The high-frequency inherent vibration signal is separated quite well with multi-scale wavelet transform.Then an envelope analysis is made to the high-frequency vibration signal.The fault of rolling bearing component is diagnosed by extracting fault feature from envelope frequency spectrum figure.The experiment result shows that this diagnosis approach is effective.