Affiliations: Acoustic and Vibration Research Group, Vrije
Universiteit Brussel, Brussel, Belgium
Note: [] Corresponding author: Tim De Troyer, Erasmushogeschool Brussel,
Department of Industrial Sciences and Technology, Nijverheidskaai 170, B-1070,
Brussels, Belgiume. E-mail: [email protected]
Abstract: During the recent years several new tools have been introduced by
the Vrije Universiteit Brussel in the field of Operational Modal Analysis (OMA)
such as the transmissibility based approach and the the frequency-domain OMAX
concept. One advantage of the transmissibility based approach is that the
ambient forces may be coloured (non-white), if they are fully correlated. The
main advantage of the OMAX concept is the fact that it combines the advantages
of Operational and Experimental Modal Analysis: ambient (unknown) forces as
well as artificial (known) forces are processed simultaneously resulting in
improved modal parameters. In this paper, the transmissibility based
output-only approach is combined with the input/output OMAX concept. This
results in a new methodology in the field of operational modal analysis
allowing the estimation of (scaled) modal parameters in the presence of
arbitrary ambient (unknown) forces and artificial (known) forces.
