A space-frequency multiplicative regularization for force reconstruction problems - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Mechanical Systems and Signal Processing Année : 2018

A space-frequency multiplicative regularization for force reconstruction problems

Résumé

Dynamic forces reconstruction from vibration data is an ill-posed inverse problem. A standard approach to stabilize the reconstruction consists in using some prior information on the quantities to identify. This is generally done by including in the formulation of the inverse problem a regularization term as an additive or a multiplicative constraint. In the present article, a space-frequency multiplicative regularization is developed to identify mechanical forces acting on a structure. The proposed regularization strategy takes advantage of one's prior knowledge of the nature and the location of excitation sources, as well as that of their spectral contents. Furthermore, it has the merit to be free from the preliminary definition of any regular-ization parameter. The validity of the proposed regularization procedure is assessed numerically and experimentally. It is more particularly pointed out that properly exploiting the space-frequency characteristics of the excitation field to identify can improve the quality of the force reconstruction.
Fichier principal
Vignette du fichier
mixed_norm_mult_reg.pdf (1.86 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02068516 , version 1 (15-03-2019)

Identifiants

Citer

Mathieu Aucejo, Olivier de Smet. A space-frequency multiplicative regularization for force reconstruction problems. Mechanical Systems and Signal Processing, 2018, 104, pp.1-18. ⟨10.1016/j.ymssp.2017.10.027⟩. ⟨hal-02068516⟩
44 Consultations
119 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More