Conference given outside the academic context (Diverse speeches and writings)
Actuator / Sensor Placement and Experimental Modal Analysis on Piezo-Structures
De Boe, Pascal; Golinval, Jean-Claude
2000
 

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Keywords :
Actuator placement; Piezo-structures; Modal Analysis
Abstract :
[en] Few works have been performed in the field of experimental modal analysis by means of piezoelectric distributed elements. Piezoelectric laminates, initially intended for the monitoring and the control of smart structures, could also be dedicated to the experimental modal identification of an open-loop structure. A pole-residue development of the open-loop piezo-structure shows that conventional algorithms and a piezoelectric pseudo-collocated actuator/sensor may be used to estimate the mechanical modal parameters. When an initial mathematical model of the structure is available, the 'best' excitation position is determined by checking the H2 norm of the transfer function of the fully observed system. The same methodology can be applied for the selection of the monitoring locations. In most cases, experimental testing with the selected sensors set, gives acceptable information to identify target modes. These data, coupled with electrical sensing at the piezoelectric element level, can then be used to perform the modal analysis of the piezo-structure. A light clamped-free plate instrumented with piezo-laminates is used to illustrate this experimental approach.
Disciplines :
Mechanical engineering
Author, co-author :
De Boe, Pascal;  Université de Liège - ULiège > LTAS - Vibrations et Identification des Structures
Golinval, Jean-Claude  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Language :
English
Title :
Actuator / Sensor Placement and Experimental Modal Analysis on Piezo-Structures
Publication date :
2000
Event name :
5ème Congrès National de Mécanique Théorique et Appliquée
Event organizer :
UCL
Event place :
Louvain-la-Neuve, Belgium
Event date :
du 23 au 24 mai 2000
Available on ORBi :
since 29 September 2009

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