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- Title
1780. Multiscale analysis of vibration signals in engine valve system.
- Authors
Puchalski, Andrzej
- Abstract
The results of the research directed towards solving the task of automatic detection of wear and mechanical defects of internal combustion engines, are presented in the paper. The fractal geometry assumptions were applied in defining diagnostic features depended on the time scale of observations. Investigations were performed by means of the detrended fluctuation analysis. The scaling curves for the fluctuation function and singularity spectra of vibration signals obtained in monitoring a valve system of a spark ignition engine, were determined. The Hurst exponent, multifractality level and singularity exponent of a signal were tested as defects measures.
- Subjects
VIBRATION (Mechanics); ENGINE valve manufacturing; FLUCTUATIONS (Physics); SIGNALS &; signaling; INTERNAL combustion engines
- Publication
Journal of Vibroengineering, 2015, Vol 17, Issue 7, p3586
- ISSN
1392-8716
- Publication type
Article