Verification of Joint Input-State Estimation by In Situ Measurements on a Footbridge
K Maes (Katholieke Universiteit Leuven)
Eliz-Mari Lourens (Katholieke Universiteit Leuven, TU Delft - Offshore Engineering)
K van Nimmen (Katholieke Universiteit Leuven)
P van den Broeck (KAHO Sint-Lieven)
P Guillaume (Vrije Universiteit Brussel)
G de Roeck (Katholieke Universiteit Leuven)
G Lombaert
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Abstract
An existing joint input-state estimation algorithm is extended for applications in
structural dynamics. The estimation of the input and the system states is performed in a minimum-variance unbiased way, based on a limited number of response
measurements and a system model. The noise statistics are estimated, as they are
essential for the joint input-state estimation and can be used to quantify the uncertainty on the estimated forces and system states. The methodology is illustrated using data from an in situ experiment on a footbridge.