Application of Multi-scale Soft Morphological Filter in Fault Diagnosis of Bearings

According to the deficiency of classical soft morphological filter(SMF) in keeping the signal′s pulse,a filtering method for bearing vibration signals is proposed based on multi-scale soft morphological filter(MSMF).At the time of keeping the advantages of SMF such as good robustness,filtering noise and keeping detail of the signal,the structure element are further improved to get better ability of extracting the impulse in the signal.Applying MSMF to the bearing fault diagnosis,the result shows that MSMF has better ability in keeping the shock impulse in the vibration signal which provides the foundation for further diagnosis of the bearing fault.