Research on Fault Severity Evaluation Method for Rolling Bearings

Fault severity evaluation of rolling bearings is studied and a combined severity evaluation method is presented based on effective value-revolving frequency ratio and continuous wavelet transform(CWT) energy entropy.An indicator of fault severity is rendered,which is constituted by combining the former ones through sigmoid function.The result shows that the indicator of fault severity is low in normal condition and augments continuously as fault severity's increasing.