Towards Ocean Grazer's Modular Power Take-Off System Modeling: A Port-Hamiltonian Approach

J. J. Barradas-Berglind, M. Muñoz Arias, Y. Wei, W.A. Prins, A.I. Vakis, B. Jayawardhana

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Abstract

This paper presents a modular modeling framework for the Ocean Grazer's Power Take-Off (PTO) system, which operates as an array of point-absorber type devices connected to a hydraulic system. The modeling is based on the port-Hamiltonian (PH) framework that enables energy-based analysis and control of the PTO system. Firstly, a modular model of a point-absorber hydraulic system, which represents the main building block of the PTO, is presented. The model consists of wave-mechanical and hydraulic subsystems that are interconnected with a transformer-type interconnection. Secondly, we show passivity of the point-absorber hydraulic element and the accumulation of potential energy, which is due to the novel pumping mechanism of the point-absorber. Finally, we illustrate these properties through simulation results.
Original languageEnglish
Title of host publication 20th World Congress of the International Federation of Automatic Control
EditorsDenis Dochain, Didier Henrion, Dimitri Peaucelle
PublisherIFAC
Pages15663-15669
Number of pages7
DOIs
Publication statusPublished - Jul-2017
EventIFAC 2017 World Congress: The 20th World Congress of the International Federation of Automatic Control - Toulouse, France
Duration: 9-Jul-201714-Jul-2017
https://www.ifac2017.org/

Publication series

NameIFAC- PapersOnLine
Number1
Volume50

Conference

ConferenceIFAC 2017 World Congress
CountryFrance
CityToulouse
Period09/07/201714/07/2017
Internet address

Keywords

  • ocean grazer
  • Port Hamiltonian modeling

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