Print Email Facebook Twitter A general substructure-based framework for input-state estimation using limited output measurements Title A general substructure-based framework for input-state estimation using limited output measurements Author Tatsis, K. E. (ETH Zürich) Dertimanis, V. K. (ETH Zürich) Papadimitriou, C. (University of Thessaly) Lourens, E. (TU Delft Offshore Engineering; TU Delft Dynamics of Structures) Chatzi, E. N. (ETH Zürich) Date 2021 Abstract This paper presents a general framework for estimating the state and unknown inputs at the level of a system subdomain using a limited number of output measurements, enabling thus the component-based vibration monitoring or control and providing a novel approach to model updating and hybrid testing applications. Under the premise that the system subdomain dynamics are driven by the unknown (i) externally applied inputs and (ii) interface forces, with the latter representing the unmodeled system components, the problem of output-only response prediction at the substructure level can be tailored to a Bayesian input-state estimation context. As such, the solution is recursively obtained by fusing a Reduced Order Model (ROM) of the structural subdomain of interest with the available response measurements via a Bayesian filter. The proposed framework is without loss of generality established on the basis of fixed- and free-interface domain decomposition methods and verified by means of three simulated Wind Turbine (WT) structure applications of increasing complexity. The performance is assessed in terms of the achieved accuracy on the estimated unknown quantities. Subject Bayesian filteringDynamic substructuringInput-state estimationReduced-order modelingResponse predictionStructural health monitoring To reference this document use: http://resolver.tudelft.nl/uuid:ce0866d3-b136-4d81-902f-be94ba8db1e6 DOI https://doi.org/10.1016/j.ymssp.2020.107223 ISSN 0888-3270 Source Mechanical Systems and Signal Processing, 150, 1-21 Part of collection Institutional Repository Document type journal article Rights © 2021 K. E. Tatsis, V. K. Dertimanis, C. Papadimitriou, E. Lourens, E. N. Chatzi Files PDF 1_s2.0_S0888327020306099_main.pdf 7.09 MB Close viewer /islandora/object/uuid:ce0866d3-b136-4d81-902f-be94ba8db1e6/datastream/OBJ/view