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    Parameterisation of Radiation Forces for a Multiple Degree-of-Freedom Wave Energy Converter Using Moment-Matching


    Faedo, Nicolás and Peña-Sanchez, Yerai and Ringwood, John (2019) Parameterisation of Radiation Forces for a Multiple Degree-of-Freedom Wave Energy Converter Using Moment-Matching. In: Proceedings of the Twenty-ninth (2019) International Ocean and Polar Engineering Conference. International Society of Offshore and Polar Engineers (ISOPE), pp. 166-173. ISBN 9781880653852

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    Abstract

    The motion of a Wave Energy Converter (WEC) can be described in terms of an integro-differential equation, which involves a convolution operator. This convolution term accounts for the effect of radiation forces acting on the device, and represents a computational and representational drawback both for simulation, and analysis/design of control/estimation strategies. We present herein a moment-based strategy to compute a parametric form of the radiation force subsystem for multiple degree of freedom WECs. The strategy allows for the computation of a model that exactly matches the steady-state behaviour of the target system at a set of user-defined frequencies, while retaining the underlying physical properties of radiation forces. The potential and capabilities of the presented method are illustrated considering a CorPower-like device (heaving point absorber) as an application case

    Item Type: Book Section
    Additional Information: Funding: This material is based upon works supported by Science Foundation Ireland under Grant no. 13/IA/1886. Cite as: Peña-Sanchez, Yerai, Faedo, Nicolá, and John V. Ringwood. "A Critical Comparison Between Parametric Approximation Methods for Radiation Forces in Wave Energy Systems." Paper presented at the The 29th International Ocean and Polar Engineering Conference, Honolulu, Hawaii, USA, June 2019.
    Keywords: Radiation forces; Parametric form; Model order reduction; Frequency-domain identification; Moment-matching;
    Academic Unit: Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
    Faculty of Science and Engineering > Electronic Engineering
    Item ID: 14275
    Depositing User: Professor John Ringwood
    Date Deposited: 29 Mar 2021 16:08
    Publisher: International Society of Offshore and Polar Engineers (ISOPE)
    Refereed: Yes
    Funders: Science Foundation Ireland (SFI)
    URI:

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