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http://hdl.handle.net/20.500.12188/7869
Наслов: | A data-driven diagnostic tool for wind turbines under operational variability | Authors: | Bogoevska, S. Chatzi, E. Dumova-Jovanoska, E. Höffer, R. |
Keywords: | Data-driven diagnostics, Operating wind turbine, Structural variability, Uncertainty propagation | Issue Date: | авг-2018 | Source: | Bogoevska¹, S., Chatzi, E., Dumova-Jovanoska¹, E. and Höffer, R., 2018. A data-driven diagnostic tool for wind turbines under operational variability. | Conference: | 9th International Conference on Computational Methods (ICCM) | Abstract: | The need for real-time condition assessment of complex systems relies on implementation of holistic Structural Health Monitoring (SHM) strategies that are capable of tracking structural behavior in a complete operational spectrum of the structure, distinguishing between true system changes and nonthreatening variations. The proposed data-driven framework utilizes an autonomous bi-component tool able to link monitored structural response with random evolution of Environmental and Operational Parameters (EOP) affecting the monitored system. The approach combines the implementation of a Smoothness Priors Time Varying Autoregressive Moving Average (SP-TARMA) method for modeling the temporal variability in structural response, and a Polynomial Chaos Expansion (PCE) probabilistic model for modeling the propagation of response uncertainty. The computational tool is applied on long-term data, collected from an active sensing system installed for four years on a real operating WT structure located in Dortmund, Germany. The twenty one-month tracking of the proposed PCE-SPTARMA diagnostic index, further assessed by means of statistic-based analysis, demonstrates that the proposed symbiotic treatment yields a robust model, capable of separating benign EOP fluctuations from potential pattern alterations due to actual structural damage. The obtained data-driven model verifies the future prospective of the strategy for development of an automated SHM diagnostic tool. | URI: | http://hdl.handle.net/20.500.12188/7869 |
Appears in Collections: | Faculty of Civil Engineering: Conference papers |
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Bogoevska etal._ICCM2018_fullpaper.pdf | 1.83 MB | Adobe PDF | View/Open |
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