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- Title
Aeroengine Data Correlation by Means of Detrended Fluctuation Analysis.
- Authors
Keqiang Dong; You Gao; Changjun Zhu
- Abstract
This paper gives a detailed analysis to the correlation and cross-correlation characteristics for aeroengine dynamics. By applying the detrended fluctuation analysis, we find that the detrended fluctuation function of the aeroengine series follows a power-law, F(s)~sα, where the parameter α, called correlation exponent, represents the correlation properties in signals. Specially, the correlation property of the exhaust gas temperature (EGT) and engine fan speeds (N1 and N2) are similar. Further, we consider the cross-correlation of the aeroengine time series. Interestingly, the properties of detrended cross-correlation analysis function between exhaust gas temperature (EGT) and engine fan speeds (N1) is analogous to the functional properties obtained by exhaust gas temperature (EGT) and engine fan speeds (N2). These results indicate that the correlation and cross-correlation features exist in the aeroengine system.
- Subjects
AIRPLANE motors; STATISTICAL correlation; FLUCTUATIONS (Physics); WASTE gases; TEMPERATURE effect; TIME series analysis
- Publication
International Review on Computers & Software, 2012, Vol 7, Issue 5, p2745
- ISSN
1828-6003
- Publication type
Article