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NDT.net Issue - 2015-02 - Articles
NDT.net Issue: 2015-02
Publication: 7th European Workshop on Structural Health Monitoring (EWSHM 2014), July 8-11, 2014 in Nantes, France (EWSHM 2014)
Session: Wind Energy
ARTICLE

Lptv Subspace Analysis of Wind Turbines Data

Laurent Mevel18, Ivan Gueguen22, Dmitri Tcherniak310
1Institut national de recherche en informatique et en automatique (INRIA)12, Rennes cedex, France
2IFSTTAR2, Nantes, France
3Bruel and Kjaer, SVM10, Nærum bei Kopenhagen, Denmark

Abstract: The modal analysis of a wind turbine has been generally handled with the assumption that this structure can be accurately modeled as linear time-invariant. Such assumption may be misleading for stability analysis, especially, with the current development of very large wind turbines with complex dynamic behavior (nonlinearity, aeroelastic coupling). Therefore in this paper, the inherent periodically time-varying dynamics of wind turbines (and for rotating systems, in general) is taken into account. Recently a subspace algorithm for modal analysis of rotating systems has been proposed. It is tested on a simulated and real data from a wind turbine.

Keywords: modal analysis (29), Marine SHM applications (5), Energy SHM applications for offshore structures (4),
*Keywords are freely formed keywords from the authors and thus you may Search also for similar terms.

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