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    Multibody Modelling of Wave Energy Converters Using Pseudo-Spectral Methods With Application to a Three-Body Hinge-Barge Device


    Paparella, Francesco and Bacelli, Giorgio and Paulmeno, Andrew and Mouring, Sarah E. and Ringwood, John (2016) Multibody Modelling of Wave Energy Converters Using Pseudo-Spectral Methods With Application to a Three-Body Hinge-Barge Device. IEEE Transactions on Sustainable Energy, 7 (3). pp. 996-974. ISSN 1949-3029

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    Abstract

    Multibody wave energy converters are composed of several bodies interconnected by joints. Two different formulations are adopted to describe the dynamics of multibody systems: the differential and algebraic equations (DAEs) formulation, and the ordinary differential equations (ODEs) formulation. While the number of variables required for the description of the dynamics of a multibody system is greater in the DAE formulation than in the ODE formulation, the ODE formulation involves an extra computational effort in order to describe the dynamics of the system with a smaller number of variables. In this paper, pseudo-spectral (PS) methods are applied in order to solve the dynamics of multibody wave energy converters using both DAE and ODE formulations. Apart from providing a solution to the dynamics of multibody systems, pseudo-spectral methods provide an accurate and efficient formulation for the control of multibody wave energy converters. As an application example, this paper focuses on the dynamic modeling of a three-body hinge-barge device, where wave-tank tests are carried out in order to validate the DAE and ODE models against experimental data. Comparison of the ODE and DAE PS methods against a reference model based on the straightforward (Runge-Kutta) integration of the equations of motion shows that pseudo-spectral methods are computationally more stable and require less computational effort for short time steps.

    Item Type: Article
    Additional Information: This paper was supported by the Science Foundation Ireland under Grant 12/RC/2302 for the Marine Renewable Ireland (MaREI) Centre. Paper no. TSTE-00644-2015.
    Keywords: Multi-body wave energy converters; pseudospectral methods; model-based control;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Item ID: 9392
    Identification Number: https://doi.org/10.1109/TSTE.2015.2510699
    Depositing User: Professor John Ringwood
    Date Deposited: 23 Apr 2018 15:44
    Journal or Publication Title: IEEE Transactions on Sustainable Energy
    Publisher: IEEE
    Refereed: Yes
    Funders: Science Foundation Ireland (SFI)
    URI:

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