title: A Data-Driven Diagnostic Framework for Wind Turbine Structures: A Holistic Approach.
abstract: The complex dynamics of operational wind turbine (WT) structures challenges the applicability of existing structural health monitoring (SHM) strategies for condition assessment. At the center of Europe's renewable energy strategic planning, WT systems call for implementation of strategies that may describe the WT behavior in its complete operational spectrum. The framework proposed in this paper relies on the symbiotic treatment of acting environmental/operational variables and the monitored vibration response of the structure. The approach aims at accurate simulation of the temporal variability characterizing the WT dynamics, and subsequently at the tracking of the evolution of this variability in a longer-term horizon. The bi-component analysis tool is applied on long-term data, collected as part of continuous monitoring campaigns on two actual operating WT structures located in different sites in Germany. The obtained data-driven structural models verify the potential of the proposed strategy for development of an automated SHM diagnostic tool.
authors.affiliation: Faculty of Civil Engineering, University Ss. Cyril and Methodius, Skopje 1000, Macedonia. simona.bogoevska@gf.ukim.edu.mk.
authors.forename: Simona
authors.initials: S
authors.lastname: Bogoevska
authors.affiliation: Department of Civil, Environmental and Geomatic Engineering, ETH, Zürich CH-8093, Switzerland. mspyridonakos@gmail.com.
authors.forename: Minas
authors.initials: M
authors.lastname: Spiridonakos
authors.affiliation: Department of Civil, Environmental and Geomatic Engineering, ETH, Zürich CH-8093, Switzerland. chatzi@ibk.baug.ethz.ch.
authors.forename: Eleni
authors.initials: E
authors.lastname: Chatzi
authors.affiliation: Faculty of Civil Engineering, University Ss. Cyril and Methodius, Skopje 1000, Macedonia. dumova@gf.ukim.edu.mk.
authors.forename: Elena
authors.initials: E
authors.lastname: Dumova-Jovanoska
authors.affiliation: Department of Civil and Environmental Engineering, Ruhr-University Bochum, Bochum 44801, Germany. ruediger.hoeffer@ruhr-uni-bochum.de.
authors.forename: Rudiger
authors.initials: R
authors.lastname: Höffer
keywords: data-driven framework; operational spectrum; polynomial chaos expansion (PCE); time varying autoregressive moving average (TV-ARMA) models; uncertainty propagation; wind turbines