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Model-based Aeroservoelastic Design and Load Alleviation of Large Wind Turbines

Author(s):

B.F. Ng, H. Hesse, R. Palacios, J.M.R. Graham, E.C. Kerrigan
Conference/Journal:

ASME Wind Energy Symposium and AIAA Science and Technology Forum, National Harbor, USA
Abstract:

This paper presents an aeroservoelastic modeling approach for dynamic load alleviation in large wind turbines with trailing-edge aerodynamic surfaces. The tower, potentially on a moving base, and the rotating blades are modeled using geometrically non-linear composite beams, which are linearized around reference conditions with arbitrarily-large structural displacements. Time-domain aerodynamics are given by a linearized 3-D unsteady vortex-lattice method and the resulting dynamic aeroelastic model is written in a state-space formulation suitable for model reductions and control synthesis. A linear model of a single blade is used to design a Linear-Quadratic-Gaussian regulator on its root-bending moments, which is finally shown to provide load reductions of about 20% in closed-loop on the full wind turbine non-linear aeroelastic model.

Year:

2014
Type of Publication:

(01)Article
Supervisor:



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% Autogenerated BibTeX entry
@InProceedings { NgEtal:2014:IFA_4984,
    author={B.F. Ng and H. Hesse and R. Palacios and J.M.R. Graham and E.C.
	  Kerrigan},
    title={{Model-based Aeroservoelastic Design and Load Alleviation of
	  Large Wind Turbines}},
    booktitle={ASME Wind Energy Symposium and AIAA Science and Technology
	  Forum},
    pages={},
    year={2014},
    address={National Harbor, USA},
    month=jan,
    url={http://control.ee.ethz.ch/index.cgi?page=publications;action=details;id=4984}
}
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