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    Optimal control of wave energy systems considering nonlinear Froude–Krylov effects: control-oriented modelling and moment-based control


    Faedo, Nicolás, Giorgi, G., Ringwood, John and Mattiazzo, Giuliana (2022) Optimal control of wave energy systems considering nonlinear Froude–Krylov effects: control-oriented modelling and moment-based control. Nonlinear Dyn.

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    Abstract

    Motivated by the relevance of so-called nonlinear Froude–Krylov (FK) hydrodynamic effects in the accurate dynamical description of wave energy converters (WECs) under controlled conditions, and the apparent lack of a suitable control framework effectively capable of optimally harvesting ocean wave energy in such circumstances, we present, in this paper, an integrated framework to achieve such a control objective, by means of two main contributions. We first propose a data-based, control-oriented, modelling procedure, able to compute a suitable mathematical representation for nonlinear FK effects, fully compatible with state-of-the-art control procedures. Secondly, we propose a moment-based optimal control solution, capable of transcribing the energy-maximising optimal control problem for WECs subject to nonlinear FK effects, by incorporating the corresponding databased FK model via moment-based theory, with realtime capabilities. We illustrate the application of the proposed framework, including energy absorption performance, by means of a comprehensive case study, comprising both the data-based modelling, and the optimal moment-based control of a heaving point absorber WEC subject to nonlinear FK forces.
    Item Type: Article
    Additional Information: How to cite this article Faedo, N., Giorgi, G., Ringwood, J.V. et al. Optimal control of wave energy systems considering nonlinear Froude–Krylov effects: control-oriented modelling and moment-based control. Nonlinear Dyn (2022). https://doi.org/10.1007/s11071-022-07530-3
    Keywords: Nonlinear hydrodynamics; Wave energy converter; Optimal control; System identification; Control-oriented modelling; Froude–Krylov forces;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
    Item ID: 16319
    Identification Number: 10.1007/s11071-022-07530-3
    Depositing User: Professor John Ringwood
    Date Deposited: 15 Jul 2022 08:52
    Journal or Publication Title: Nonlinear Dyn
    Publisher: Springer Nature
    Refereed: Yes
    Related URLs:
    URI: https://mu.eprints-hosting.org/id/eprint/16319
    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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