Faedo, Nicolás and Peña-Sanchez, Yerai and Ringwood, John (2020) Parameterisation of Radiation Forces for Multiple Degree-of-Freedom Wave Energy Converters Using Moment-Matching. International Journal of Offshore and Polar Engineering, 30 (4). pp. 395-402. ISSN 1053-5381

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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:	Article
Keywords:	Radiation forces; Parametric form; Model order reduction; Frequency-domain identification; Moment-matching;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
Item ID:	16276
Identification Number:	https://doi.org/10.17736/ijope.2020.mk71
Depositing User:	Professor John Ringwood
Date Deposited:	07 Jul 2022 08:01
Journal or Publication Title:	International Journal of Offshore and Polar Engineering
Publisher:	The International Society of Offshore and Polar Engineers
Refereed:	Yes
URI:	Publisher
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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