Non-stationary condition monitoring through event alignment

Niels Henrik Pontoppidan, Jan Larsen

AbstractWe present an event alignment framework which enables
change detection in non-stationary signals. change detection.
Classical condition monitoring frameworks have been restrained to
laboratory settings with stationary operating conditions, which are
not resembling real world operation. In this paper we apply the
technique for non-stationary condition monitoring of large diesel
engines based on acoustical emission sensor signals. The performance
of the event alignment is analyzed in an unsupervised probabilistic
detection framework based on outlier detection with either
Principal Component Analysis or Gaussian Processes modeling.
We are especially interested in the true performance of the condition
monitoring performance with mixed aligned and unaligned
data, e.g. detection of fault condition of unaligned examples versus
false alarms of aligned normal condition data. Further, we expect
that the non-stationary model can be used for wear trending due
to longer and continuous monitoring across operating condition
changes.
KeywordsCondition Monitoring, Non-stationarity, Diesel Engine
TypeConference paper [With referee]
ConferenceIEEE Workshop on Machine Learning for Signal Processing
Year2004    Month September    pp. 499-508
PublisherIEEE Press
AddressPiscataway, New Jersey
Electronic version(s)[pdf]
Publication linkhttp://isp.imm.dtu.dk/mlsp2004
BibTeX data [bibtex]
IMM Group(s)Intelligent Signal Processing


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