An iterated multiplicative regularization for force reconstruction problems. (22nd December 2018)

• Record Type: Journal Article
• Authors: Aucejo, M.; De Smet, O.
• Is Part Of: Journal of sound and vibration. Volume 437(2018)
• Page Start: 16
• Page End: 28
• Publication Date: 2018-12-22
• Subjects: Inverse problem -- Force reconstruction -- Multiplicative regularization -- Iterated regularization; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2018.09.020
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: In presence of very noisy data, standard regularization methods generally fail in reconstructing satisfying solutions. To this end, iterated regularization techniques can be implemented. This class of regularization approaches can be seen as an iterative refinement of an initial solution obtained from classical regularization methods. In the present paper, an iterated multiplicative regularization for dealing with force reconstruction problems is discussed. More specifically, the associated non-stationary formulation is compared to its stationary counterpart through numerical and experimental validations. It is shown that the proposed stationary version outperforms the non-stationary formulation regarding the quality of reconstructed solutions. Highlights: A stationary and non-stationary iterated multiplicative regularization are introduced. The formulation is highly flexible to describe prior knowledge of the sources. The method is validated numerically and experimentally. The proposed approach is more robust than standard approaches.