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Short-Time/-Angle Spectral Analysis for Vibration Monitoring of Bearing Failures under Variable Speed
- Source :
- Applied Sciences, Vol 11, Iss 3369, p 3369 (2021), Applied Sciences, Volume 11, Issue 8
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- Vibration-condition monitoring aims to detect bearing damages of rotating machinery’s incipient failures mainly through time–frequency methods because of their efficient analysis of nonstationary signals. However, by having failures with impulse behavior, short-term events have a tendency to be diluted under variable-speed conditions, while information on frequency changes tends to be lost. Here, we introduce an approach to highlighting bearing impulsive failures by measuring short-term spectral components to deal with variable-speed vibrations. The short-term estimator employs two sliding windows: a small one that measures the instantaneous amplitude level and tracks impulsive components and a large interval that evaluates the average background amplitude. Aiming to characterize cyclo-non-stationary processes with impulsive behavior, the emphasizing high-order-based estimator based on the principle of spectral entropy is introduced. For evaluation, both visual inspection and classifier performance are assessed, contrasting the spectral-entropy estimator with the widely used spectral-kurtosis approach for dealing with impulsive signals. The validation of short-time/-angle spectral analysis performed on three datasets at variable speed showed that the proposed spectral-entropy estimator is a promising indicator for emphasizing bearing failures with impulse behavior.
- Subjects :
- 0209 industrial biotechnology
vibration monitoring
Computer science
02 engineering and technology
Interval (mathematics)
spectral kurtosis
Impulse (physics)
01 natural sciences
lcsh:Technology
law.invention
lcsh:Chemistry
020901 industrial engineering & automation
Control theory
law
Classifier (linguistics)
General Materials Science
bearing failure
Instrumentation
lcsh:QH301-705.5
Fluid Flow and Transfer Processes
Bearing (mechanical)
lcsh:T
Process Chemistry and Technology
010401 analytical chemistry
spectral entropy
General Engineering
Estimator
lcsh:QC1-999
0104 chemical sciences
Computer Science Applications
Vibration
Variable (computer science)
Amplitude
lcsh:Biology (General)
lcsh:QD1-999
lcsh:TA1-2040
lcsh:Engineering (General). Civil engineering (General)
lcsh:Physics
Subjects
Details
- Language :
- English
- ISSN :
- 20763417
- Volume :
- 11
- Issue :
- 3369
- Database :
- OpenAIRE
- Journal :
- Applied Sciences
- Accession number :
- edsair.doi.dedup.....bfe3b7084aa3dddd84fb9724d8deda67