2016
DOI: 10.5194/wes-1-297-2016
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Articulated blade tip devices for load alleviation on wind turbines

Abstract: Abstract. This paper investigates the load alleviation capabilities of an articulated tip device, where the outermost portion of the blade can rotate with respect to the rest of the blade. Passive, semi-passive and active solutions are developed for the tip rotation. In the passive and semi-passive configurations tip pitching is mainly driven by aerodynamic loads, while for the active case the rotation is obtained with an actuator commanded by a feedback control law. Each configuration is analyzed and tested u… Show more

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Cited by 8 publications
(3 citation statements)
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“…Although this means that the estimation of normalized maxima might not be fully converged, meaningful comparisons and results relative to the effect of blade‐pitch faults and shutdown can still be achieved because all fault cases use the same time histories of wind and wave loads for each load case considered. The use of single seed comparisons, that is, comparisons from identical dynamic states, is also common practice in the relevant literature, particularly within concept verification and parametric analysis 53–59 . Future work will perform a detailed structural design of the two‐rotor floating wind system, where full coverage of the stochastic variability and quantification of converged maxima will be included.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Although this means that the estimation of normalized maxima might not be fully converged, meaningful comparisons and results relative to the effect of blade‐pitch faults and shutdown can still be achieved because all fault cases use the same time histories of wind and wave loads for each load case considered. The use of single seed comparisons, that is, comparisons from identical dynamic states, is also common practice in the relevant literature, particularly within concept verification and parametric analysis 53–59 . Future work will perform a detailed structural design of the two‐rotor floating wind system, where full coverage of the stochastic variability and quantification of converged maxima will be included.…”
Section: Methodsmentioning
confidence: 99%
“…The use of single seed comparisons, that is, comparisons from identical dynamic states, is also common practice in the relevant literature, particularly within concept verification and parametric analysis. [53][54][55][56][57][58][59] Future work will perform a detailed structural design of the two-rotor floating wind system, where full coverage of the stochastic variability and quantification of converged maxima will be included. 13 In the table, LC stands for the load case prefix, U W is the mean wind speed at the hub height, H S is the significant wave height, T P is the wave period, t f is the time at which the fault occurs, and t d is the time delay from the occurrence of fault to the shutdown initiation.…”
Section: Numerical Simulationmentioning
confidence: 99%
“…The concept of using the wind turbine rotor as a wind sensor has been proposed to improve wind condition awareness (Bottasso et al, 2010;Simley and Pao, 2016;Bertelè et al, 2017). In a nutshell, wind sensing uses the response of the rotor -in the form of loads, accelerations, and other operational data -to infer the characteristics of the wind blowing on the turbine.…”
Section: Introductionmentioning
confidence: 99%