Variance computation of MAC and MPC for real-valued mode shapes from the stabilization diagram - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Conference Papers Year : 2019

Variance computation of MAC and MPC for real-valued mode shapes from the stabilization diagram

Abstract

Recent advances in efficient variance computation of modal parameter estimates from the output-only subspace-based identification algorithms make the modal parameter variance a practical modal indicator, indicating the accuracy of the estimation. A further modal indicator is the Modal Assurance Criterion (MAC), for which a recently developed uncertainty quantification scheme estimates the variance at a fixed model order. The Modal Phase Collinearity (MPC) is another popular indicator, for which an uncertainty scheme is currently missing. Unlike other modal parameters, which are Gaussian distributed, estimates of MAC and MPC are close to the border of their respective distribution support and cannot be approximated as a Gaussian random variable. This paper addresses the respective uncertainty quantification of MAC and MPC. The results are validated in the context of operational modal analysis (OMA) of a spring mass system.
Fichier principal
Vignette du fichier
25_Gres_Identification_techniques.pdf (624.17 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02143765 , version 1 (29-05-2019)

Identifiers

  • HAL Id : hal-02143765 , version 1

Cite

Szymon Gres, Michael Dohler, Palle Andersen, Laurent Mevel. Variance computation of MAC and MPC for real-valued mode shapes from the stabilization diagram. IOMAC 2019 - 8th International Operational Modal Analysis Conference, May 2019, Copenhagen, Denmark. pp.1-9. ⟨hal-02143765⟩
167 View
588 Download

Share

Gmail Facebook X LinkedIn More