System Identification Methods for (Operational) Modal Analysis: Review and Comparison |
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Authors: | Edwin Reynders |
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Affiliation: | (1) Dept. of Civil Engineering, K.U.Leuven, Kasteelpark Arenberg 40, 3001 Leuven, Belgium |
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Abstract: | 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. |
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Keywords: | |
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