Bearing fault detection with application to PHM Data Challenge

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Published Jan 1, 2011
Pavle Boškoski Anton Urevc

Abstract

Mechanical faults in the items of equipment can result in partial or total breakdown, destruction and even catastrophes. By implementation of an adequate fault detection system the risk of unexpected failures can be reduced. Traditionally, fault detection process is done by comparing the feature sets acquired in the faulty state with the ones acquired in the fault–free state. However, such historical data are rarely available. In such cases, the fault detection process is performed by examining whether a particular pre–modeled fault signature can be matched within the signals acquired from the monitored machine. In this paper we propose a solution to a problem of fault detection without any prior data, presented at PHM’09 Data Challenge. The solution is based on a two step algorithm. The first step, based on the spectral kurtosis method, is used to determine whether a particular experimental run is likely to contain a faulty element. In case of a positive decision, fault isolation procedure is applied as the second step. The fault isolation procedure was based on envelope analysis of band–pass filtered vibration signals. The band–pass filtering of the vibration signals was performed in the frequency band that maximizes the spectral kurtosis. The effectiveness of the proposed approach was evaluated for bearing fault detection, on the vibration data obtained from the PHM’09 Data Challenge.

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Keywords

Bearing fault detection

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Section
Technical Papers