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Title: Model-based aeroelastic analysis and blade load alleviation of offshore wind turbines
Authors: Ng, Bing Feng
Palacios, Rafael
Graham, J. Michael R.
Keywords: Engineering::Mechanical engineering
Issue Date: 2017
Source: Ng, B. F., Palacios, R. & Graham, J. M. R. (2017). Model-based aeroelastic analysis and blade load alleviation of offshore wind turbines. International Journal of Control, 90(1), 15-36.
Journal: International Journal of Control
Abstract: Offshore wind turbines take advantage of the vast energy resource in open waters but face structural integrity challenges specific to their operating environment that require cost-effective load alleviation solutions. This paper introduces a computational methodology for model-based two- and three-dimensional design of load alleviation systems on offshore wind turbines. The aero-hydro-servoelastic model is formulated in a convenient state-space representation, coupling a multi-body composite beam description of the main structural elements with unsteady vortex-lattice aerodynamics and Morison's description of the hydrodynamics. The aerodynamics does not require empirical corrections and focuses on a control-oriented approach to the modelling. Numerical results show that through trailing-edge flaps actuated by a robust controller, more than 60% reduction in dynamic loading due to atmospheric turbulence can be achieved for the sectional model and close to 13% reduction in blade loads is obtained for the complete three-dimensional floating turbine.
ISSN: 0020-7179
DOI: 10.1080/00207179.2015.1068456
Rights: This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Control on 31 Jul 2015, available online:
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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