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Frequency-domain subspace identification of nonlinear mechanical systems - Application to a solar array structure
Noël, Jean-Philippe; Kerschen, Gaëtan; Foltête, Emmanuel et al.
2013In Proceedings of the International Modal Analysis Conference (IMAC) XXXI
 

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Keywords :
Nonlinear system identification; subspace method; frequency domain; space structure; experimental data
Abstract :
[en] The present paper addresses the experimental identification of a simplified realisation of a solar array structure in folded configuration. To this end, a nonlinear subspace identification technique formulated in the frequency domain, referred to as the FNSI method, is exploited. The frequency response functions of the underlying linear structure and the nonlinear coefficients are estimated by this approach. Nonlinearity is caused by impacts between adjacent panels and friction and gaps appearing in their clamping interfaces. This application is challenging for several reasons, which include high modal density and the complicated nature of the involved nonlinear mechanisms.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Noël, Jean-Philippe ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Kerschen, Gaëtan  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Foltête, Emmanuel;  LMARC > FEMTO-ST Institute
Cogan, Scott;  LMARC > FEMTO-ST Institute
Language :
English
Title :
Frequency-domain subspace identification of nonlinear mechanical systems - Application to a solar array structure
Publication date :
February 2013
Event name :
International Modal Analysis Conference (IMAC) XXXI
Event organizer :
SEM
Event place :
Garden Grove, United States - California
Event date :
du 11 février 2013 au 14 février 2013
Audience :
International
Main work title :
Proceedings of the International Modal Analysis Conference (IMAC) XXXI
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
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