Název: Multilevel Analysis of Continuous Acoustic Emission Records
Autoři: Chlada, Milan ; Převorovský, Zdeněk
Typ dokumentu: Příspěvky z konference
Konference/Akce: SPMS 2013, Nebřich (CZ), 2013-06-24 / 2013-06-29
Rok: 2013
Jazyk: eng
Abstrakt: The latest acoustic emission (AE) systems provide continuous recording of high-frequency signals registered during longtime monitoring of various processes in materials. Recorded data represent extremely large amount of information to analyze, however, it reflects the health of the structure. Therefore, in the last years the attention is paid to the diagnostic method of continuous AE also as a part of Structural Health Monitoring (SHM) systems. For example it can disclose the early damage phases (cracks) or certain imperfections in rotating gearboxes, the leakage of liquids from pressure vessels and many other material defects. This method requires new signal processing and analysis approaches, which are different from the burst AE. The paper deals with the analysis of continuous AE, recorded during the test of renovated gearbox at different flight modes. As an alternative to classical spectrogram, so-called multilevel countogram based on the signal wavelet decomposition is proposed and discussed.
Klíčová slova: continuous acoustic emission; countogram; helicopter gearbox diagnostics; wavelet analysis
Číslo projektu: FR-TI3/755 (CEP)
Poskytovatel projektu: GA MPO
Zdrojový dokument: Stochastic and Physical Monitoring Systems 2013, ISBN 978-80-01-05383-6

Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0228795

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-170072


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference