Rolling bearing fault research on wavelet threshold denoising

The changes of the rolling bearing frequency with various bearing fault and the features of penalty wavelet denoising model,brige-Massart wavelet denoising model and default wavelet denoising model are analyzed.The actual bearing fault signals are analyzed by wavelet and three wavelet thresholding denoising models.The result shows that penalty wavelet thresholding denoising and brige-Massart wavelet thresholding denoising are better than default wavelet denoising.Frequency spectrum analysis of denoised signal is performed to get bearing characteristic value and determine the type of rolling bearing failures.