Use of spectral kurtosis for improving signal to noise ratio of acoustic emission signal from defective bearings

摘要

The use of Acoustic Emission (AE) to monitor the condition of roller bearings in rotatingmachinery is growing in popularity. This investigation is centred on the application ofSpectral Kurtosis (SK) as a denoising tool able to enhance the bearing fault features from anAE signal. This methodology was applied to AE signals acquired from an experimentalinvestigation where different size defects were seeded on a roller bearing. The results suggestthat the signal to noise ratio can be significantly improved using SK.