System Identification Methods for (Operational) Modal Analysis: Review and Comparison

• Autores: Edwin Reynders
• Localización: Archives of computational methods in engineering: state of the art reviews, ISSN 1134-3060, Vol. 19, Nº. 1, 2012, págs. 51-124
• Idioma: inglés
• DOI: 10.1007/s11831-012-9069-x
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• Resumen

  • Operational modal analysis deals with the estimation of modal parameters from vibration data obtained in operational rather than laboratory conditions. This paper extensively reviews operational modal analysis approaches and related system identification methods. First, the mathematical models employed in identification are related to the equations of motion, and their modal structure is revealed. Then, strategies that are common to the vast majority of identification algorithms are discussed before detailing some powerful algorithms. The extraction and validation of modal parameter estimates and their uncertainties from the identified system models is discussed as well. Finally, different modal analysis approaches and algorithms are compared in an extensive Monte Carlo simulation study