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    Optimal control of wave cycloidal rotors with passively morphing foils: An analytical and numerical study

    Ermakov, Andrei (2024) Optimal control of wave cycloidal rotors with passively morphing foils: An analytical and numerical study. Marine Structures, 95. ISSN 09518339

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    In this paper we perform an analytical and numerical study of the performance of a wave cycloidal rotor in irregular waves, with passively morphing foils and variable rotational velocity control. The performance is measured in two ways: Mechanical power, and fatigue damage in a sample stress hot spot located at the fixed end of the hydrofoils. We consider different strategies seeking to both maximise power extraction and reduce fatigue damage. To maximise power, we consider both constant and variable rotational speed. To mitigate fatigue damage, we consider, for the first time, morphing foils in the context of a wave cycloidal rotor. By testing these control strategies in isolation and in combination, and with the aid of high performance computations, we find that variable rotational speed, in combination with morphing foils, offers the best compromise to enhance power production with a reduced structural penalty on the sample stress hot spot. Hence, in this work, we demonstrate that novel control strategies, such as those proposed in this work, can hold the key in reducing the levelised cost of energy and accelerate the commercialisation of the next generation of lift-based wave energy converters.

    Item Type: Article
    Keywords: Wave energy converter; LiftWEC; Cyclorotor; Fatigue analysis; Velocity control; Passive pitch;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Item ID: 18178
    Identification Number:
    Depositing User: Dr Andrei Ermakov
    Date Deposited: 19 Feb 2024 10:30
    Journal or Publication Title: Marine Structures
    Publisher: Elsevier
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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