Accession Number : ADP010219

Title :   Self-Aligning Roller Bearings Fault Detection Using Asynchronous Adaptive Noise Cancelling

Corporate Author : GUNMA UNIV KIRYU (JAPAN) DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Nezu, Kikuo ; Shao, Yimin

PDF Url : ADP010219

Report Date : APR 1996

Pagination or Media Count : 9

Abstract : A new method is presented for increasing the signal to noise ratio from measurements 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.

Descriptors :   *SYMPOSIA, *ROLLER BEARINGS, VIBRATION, ASYNCHRONOUS SYSTEMS, SIGNAL TO NOISE RATIO, JAPAN, ADAPTIVE SYSTEMS, NOISE REDUCTION, LOW FREQUENCY.

Subject Categories : Machinery and Tools
      Test Facilities, Equipment and Methods
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE