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    Identification of Nonlinear Excitation Force Kernels Using Numerical Wave Tank Experiments


    Giorgi, Simone and Davidson, Josh and Ringwood, John (2015) Identification of Nonlinear Excitation Force Kernels Using Numerical Wave Tank Experiments. Proceedings of the 11th European Wave and Tidal Energy Conference. ISSN 2309-1983

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    Abstract

    This paper addresses the mathematical modelling of the relationship between the free surface elevation (FSE) and the excitation force for wave energy devices (excitation force model). While most studies focus on the model relating the FSE to the device motion, the excitation force model is required to complete the mathematical wave energy system description and also plays an important role in excitation force observer design. In the paper, a range of linear and nonlinear modelling methodologies, based on system identification from numerical wave tank tests, are developed for a range of device geometries. The results demonstrate a significant benefit in adopting a nonlinear parameterisation and show that models are heavily dependent on incident wave amplitude.

    Item Type: Article
    Keywords: Excitation force; System identification; Numerical wave tank; Wave energy; Discrete-time modelling; ARX model; Hammerstein model; Kolmogorov-Gabor Polynomial Model;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Item ID: 6668
    Depositing User: Professor John Ringwood
    Date Deposited: 15 Dec 2015 12:02
    Journal or Publication Title: Proceedings of the 11th European Wave and Tidal Energy Conference
    Publisher: European Wave and Tidal Energy Conference 2015
    Refereed: Yes
    URI:

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