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    Exploiting Stochastic Resonance Principles to Influence the Efficiency of a Torsional-Flutter Energy Harvester in Turbulent Winds1

    Source: ASME Letters in Dynamic Systems and Control:;2025:;volume( 005 ):;issue: 002::page 21006-1
    Author:
    Caracoglia, Luca
    DOI: 10.1115/1.4067394
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Wind energy harvesters are emerging as a viable alternative to standard, large horizontal-axis wind turbines. This study continues a recent investigation on the operational features of a torsional-flutter-based apparatus, proposed by the author to extract wind energy. The apparatus is composed of a non-deformable, flapping blade-airfoil. A nonlinear torsional spring mechanism, either simulated by a Duffing model or a hybrid Duffing–van der Pol model, installed at equally spaced supports, enables limit-cycle, post-critical vibration. To enhance the output power, stochastic resonance principles are invoked through a novel, negative stiffness mechanism that is coupled to the eddy current device for energy conversion. The output power is explored by numerically solving the stochastic differential equation of the model, accounting for incoming flow turbulence. Three main harvester types with variable configuration are examined; the chord length of the blade-airfoil, used for energy harvesting, varies between 0.5 and 1 m; the spanwise-length-to-chord aspect ratio is four. The flapping frequency varies between 0.10 and 0.25 Hz. The study demonstrates that exploitation of negative stiffness mechanism can improve the performance of the harvester.
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      Exploiting Stochastic Resonance Principles to Influence the Efficiency of a Torsional-Flutter Energy Harvester in Turbulent Winds1

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4306456
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    contributor authorCaracoglia, Luca
    date accessioned2025-04-21T10:34:01Z
    date available2025-04-21T10:34:01Z
    date copyright2/5/2025 12:00:00 AM
    date issued2025
    identifier issn2689-6117
    identifier otheraldsc_5_2_021006.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4306456
    description abstractWind energy harvesters are emerging as a viable alternative to standard, large horizontal-axis wind turbines. This study continues a recent investigation on the operational features of a torsional-flutter-based apparatus, proposed by the author to extract wind energy. The apparatus is composed of a non-deformable, flapping blade-airfoil. A nonlinear torsional spring mechanism, either simulated by a Duffing model or a hybrid Duffing–van der Pol model, installed at equally spaced supports, enables limit-cycle, post-critical vibration. To enhance the output power, stochastic resonance principles are invoked through a novel, negative stiffness mechanism that is coupled to the eddy current device for energy conversion. The output power is explored by numerically solving the stochastic differential equation of the model, accounting for incoming flow turbulence. Three main harvester types with variable configuration are examined; the chord length of the blade-airfoil, used for energy harvesting, varies between 0.5 and 1 m; the spanwise-length-to-chord aspect ratio is four. The flapping frequency varies between 0.10 and 0.25 Hz. The study demonstrates that exploitation of negative stiffness mechanism can improve the performance of the harvester.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleExploiting Stochastic Resonance Principles to Influence the Efficiency of a Torsional-Flutter Energy Harvester in Turbulent Winds1
    typeJournal Paper
    journal volume5
    journal issue2
    journal titleASME Letters in Dynamic Systems and Control
    identifier doi10.1115/1.4067394
    journal fristpage21006-1
    journal lastpage21006-7
    page7
    treeASME Letters in Dynamic Systems and Control:;2025:;volume( 005 ):;issue: 002
    contenttypeFulltext
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