Self-Aligning Roller Bearings Fault Detection Using Asynchronous Adaptive NoiseCancelling

摘要

A new method is presented for increasing the signal to noise ratio frommeasurements of bearing housing vibration. The method is based on the conventional ANC technique principle. It makes some variation on the main signal input and reference signal input. Because the signal of the main and reference input are collected at the different time, this method is called asynchronous adaptive noise canceling (AANC). It can improve the signal to noise ratio as to the case of the detecting hearing results when vibration signal of machinery are collected under low frequency noise condition. Experiment result has shown that these techniques can be made more effective only after AANC has reduced the background noise from the diagnostic signals. A new approach is proposed to the traditional fault detecting.