Guillaume P., De Troyer T., De Sitter G., Devriendt C.

In this contribution state-of-the-art frequency-domain modal parameter estimators will be presented. In experimental modal analysis (EMA), mechanical systems with a few inputs and hundreds of outputs have to be identified. This requires adapted frequency-domain estimators designed to handle large amount of data in a reasonable amount of time. Attention will be paid to operational modal analysis, which is a complementary technique to traditional experimental modal analysis. In operational modal analysis unknown operational forces are present. It will be shown how the modal parameters can be estimated from output-only (OMA) as well as input/output (OMAX) measurements done at operating conditions.