Detection of Generalized-Roughness Bearing Fault by Spectral-Kurtosis Energy of Vibration or Current Signals
Immovilli, F.
Cocconcelli, M.
Bellini, A.
Rubini, R.
Dipt. di Sci. e Metodi dellTngegneria, Univ. of Modena & Reggio Emilia, Reggio Emilia, Italy;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Nov. 2009
Volume: 56,
Issue: 11
On page(s): 4710-4717
ISSN: 0278-0046
INSPEC Accession Number: 10909332
Digital Object Identifier: 10.1109/TIE.2009.2025288
First Published: 2009-06-19
Current Version Published: 2009-10-09
Abstract
Generalized roughness is the most common damage occurring to rolling bearings. It produces a frequency spreading of the characteristic fault frequencies, thus making it difficult to detect with spectral or envelope analysis. A statistical analysis of typical bearing faults is proposed here in order to identify the spreading bandwidth related to specific conditions, relying on current or vibration measurements only. Then, a diagnostic index based on the computation of the energy in the previously defined bandwidth is used to diagnose bearing faults. The proposed method was validated experimentally with vibration signals, with robust and reliable results. The same procedure can be extended to current signals.
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