Identification of modal parameters from ambient vibration data by modified eigensystem realization algorithm

Dar Yun Chiang, Chang Sheng Lin, Fang He Su

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

In the present paper, we propose a modification to the Eigen system Realization Algorithm with Data Correlation (ERA/DC) for modal-parameter identification of structural systems subjected to stationary white-noise ambient vibration. By setting up a correlation-function matrix of stationary responses and introducing an appropriate factorization of the matrix, modal parameters of a system could then be effectively identified through the singular-value decomposition and eigenvalue analysis. Through numerical simulations, effectiveness and robustness of the proposed identification method is demonstrated.

Original languageEnglish
Pages (from-to)79-86
Number of pages8
JournalJournal of Aeronautics, Astronautics and Aviation
Volume42
Issue number2
Publication statusPublished - 2010 Jun

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science

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