Paper published in a book (Scientific congresses and symposiums)
Multivariate ARMA Based Modal Identification of a Time-varying Beam
Bertha, Mathieu; Golinval, Jean-Claude
2016In Proceedings of the International Modal Analysis Conference (IMAC) XXXIV
 

Files


Full Text
Multivariate ARMA Based Modal Identification of a Time-varying Beam.pdf
Publisher postprint (2.5 MB)
Download
Annexes
Multivariate ARMA Based Modal Identification of a Time-varying Beam_presentation.pdf
Publisher postprint (19.21 MB)
Slides of the oral presentation
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Modal identification; Time-varying systems; Multivariate identification; Basis functions; Autoregressive Moving-average model
Abstract :
[en] The present paper addresses the problem of modal identification of time-varying systems. The identification is based on a multivariate autoregressive moving-average model in which the time variability of the system is caught using a basis functions approach. In this approach, the time-varying regressive coefficients in the model are expended in the chosen basis functions and only the projection coefficients have to be identified. In that way, the initial time-varying problem then becomes a time-invariant one that can be solved. Because a multivariate model is used, in addition to the time-varying poles, the time-varying mode shapes may be identified too. The method is first presented and then applied on an experimental demonstration structure. The experimental structure consists of a supported beam on which a mass is travelling. The mass is chosen sufficiently large to have a significant influence on the dynamics of the primary system. This kind of problem is a classical example commonly used by many authors to test time-varying identification methods.
Disciplines :
Mechanical engineering
Aerospace & aeronautics engineering
Author, co-author :
Bertha, Mathieu ;  Université de Liège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Golinval, Jean-Claude  ;  Université de Liège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Language :
English
Title :
Multivariate ARMA Based Modal Identification of a Time-varying Beam
Publication date :
2016
Event name :
IMAC-XXXIV A Conference & Exposition on Structural Dynamics
Event organizer :
The Society for Experimental Mechanics (SEM)
Event place :
Orlando, United States
Event date :
January 25-28, 2016
Audience :
International
Main work title :
Proceedings of the International Modal Analysis Conference (IMAC) XXXIV
Available on ORBi :
since 08 February 2016

Statistics


Number of views
114 (13 by ULiège)
Number of downloads
306 (12 by ULiège)

Scopus citations®
 
3
Scopus citations®
without self-citations
3
OpenCitations
 
0

Bibliography


Similar publications



Contact ORBi