Identification of non-stationary dynamical systems using multivariate ARMA models

Bertha, Mathieu; Golinval, Jean-Claude

doi:10.1016/j.ymssp.2016.11.024

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Identification of non-stationary dynamical systems using multivariate ARMA models

Bertha, Mathieu; Golinval, Jean-Claude

2017 • In Mechanical Systems and Signal Processing, 88, p. 166-179

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https://hdl.handle.net/2268/203829

DOI
10.1016/j.ymssp.2016.11.024

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Keywords :

Time-varying systems; modal identification; vector auto-regressive moving average modeling; basis functions; moving mass problem

Abstract :

[en] This paper is concerned by the modal identification of time-varying mechanical systems. Based on previous works about autoregressive moving average models in vector form (ARMAV) for the modal identification of linear time invariant systems, and time-varying autoregressive moving average models (TV-ARMA) for the identification of nonstationary systems, a time-varying ARMAV (TV-ARMAV) model is presented for the multivariate identification of time-varying systems. It results in the identification of not only the time-varying poles of the system but also of its respective time-varying mode shapes. The method is applied on a time-varying structure composed of a beam on which a mass is moving.

Disciplines :

Aerospace & aeronautics engineering
Mechanical 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 :

Identification of non-stationary dynamical systems using multivariate ARMA models

Publication date :

01 May 2017

Journal title :

Mechanical Systems and Signal Processing

ISSN :

0888-3270

eISSN :

1096-1216

Publisher :

Elsevier, Atlanta, Georgia

Volume :

Pages :

166-179

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 28 November 2016

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299 (3 by ULiège)

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