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BLIND SOURCE SEPARATION TECHNIQUES FOR MODAL ANALYSIS: EXPERIMENTAL DEMONSTRATION
Poncelet, Fabien; Kerschen, Gaëtan; Golinval, Jean-Claude et al.
2007In International Conference on Engineering Dynamics, Carvoeiro, 2007
 

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Keywords :
Blind source separation; system identification; modal analysis; independent component analysis; second-order blind identification
Abstract :
[en] The present study carries out output-only modal analysis using two blind source separation (BSS) techniques, namely independent component analysis and second-order based identification. It is shown under which circumstances the normal coordinates of the vibration modes may be interpreted as virtual sources, which renders the application of these BSS techniques possible. To support the theoretical findings, numerical experiments are first carried out using a discrete system of three masses. Secondly the method is applied to a real-life structure which is a blade extracted from a turbojet engine stator. The results are compared with the stochastic subspace identification method.
Disciplines :
Physics
Computer science
Mechanical engineering
Mathematics
Author, co-author :
Poncelet, Fabien ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Kerschen, Gaëtan  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Golinval, Jean-Claude  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Verlest, D.;  Techspace Aero (Safran Group) Liège, Belgium
Language :
English
Title :
BLIND SOURCE SEPARATION TECHNIQUES FOR MODAL ANALYSIS: EXPERIMENTAL DEMONSTRATION
Publication date :
2007
Event name :
International Conference on Engineering Dynamics
Event place :
Carvoeiro, Portugal
Audience :
International
Main work title :
International Conference on Engineering Dynamics, Carvoeiro, 2007
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since 15 August 2009

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