Stochastic Control of Inertial Sea Wave Energy Converter

The ISWEC (inertial sea wave energy converter) is presented, its control problems are stated, and an optimal control strategy is introduced. As the aim of the device is energy conversion, the mean absorbed power by ISWEC is calculated for a plane 2D irregular sea state. The response of the WEC (wave...

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Main Authors: Mattia Raffero, Michele Martini, Biagio Passione, Giuliana Mattiazzo, Ermanno Giorcelli, Giovanni Bracco
Format: Article
Language:English
Published: Wiley 2015-01-01
Series:The Scientific World Journal
Online Access:http://dx.doi.org/10.1155/2015/980613
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author Mattia Raffero
Michele Martini
Biagio Passione
Giuliana Mattiazzo
Ermanno Giorcelli
Giovanni Bracco
author_facet Mattia Raffero
Michele Martini
Biagio Passione
Giuliana Mattiazzo
Ermanno Giorcelli
Giovanni Bracco
author_sort Mattia Raffero
collection DOAJ
description The ISWEC (inertial sea wave energy converter) is presented, its control problems are stated, and an optimal control strategy is introduced. As the aim of the device is energy conversion, the mean absorbed power by ISWEC is calculated for a plane 2D irregular sea state. The response of the WEC (wave energy converter) is driven by the sea-surface elevation, which is modeled by a stationary and homogeneous zero mean Gaussian stochastic process. System equations are linearized thus simplifying the numerical model of the device. The resulting response is obtained as the output of the coupled mechanic-hydrodynamic model of the device. A stochastic suboptimal controller, derived from optimal control theory, is defined and applied to ISWEC. Results of this approach have been compared with the ones obtained with a linear spring-damper controller, highlighting the capability to obtain a higher value of mean extracted power despite higher power peaks.
format Article
id doaj-art-45454945e8244ae28d6f3a39d8a08399
institution Kabale University
issn 2356-6140
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language English
publishDate 2015-01-01
publisher Wiley
record_format Article
series The Scientific World Journal
spelling doaj-art-45454945e8244ae28d6f3a39d8a083992025-02-03T06:45:27ZengWileyThe Scientific World Journal2356-61401537-744X2015-01-01201510.1155/2015/980613980613Stochastic Control of Inertial Sea Wave Energy ConverterMattia Raffero0Michele Martini1Biagio Passione2Giuliana Mattiazzo3Ermanno Giorcelli4Giovanni Bracco5Department of Mechanics and Aerospace Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, ItalyEnvironmental Hydraulics Institute “IH Cantabria”, C/Isabel Torres 15, Santander, 39011 Cantabria, SpainDepartment of Mechanics and Aerospace Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, ItalyDepartment of Mechanics and Aerospace Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, ItalyDepartment of Mechanics and Aerospace Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, ItalyDepartment of Mechanics and Aerospace Engineering, Polytechnic University of Turin, Corso Duca degli Abruzzi 24, 10129 Turin, ItalyThe ISWEC (inertial sea wave energy converter) is presented, its control problems are stated, and an optimal control strategy is introduced. As the aim of the device is energy conversion, the mean absorbed power by ISWEC is calculated for a plane 2D irregular sea state. The response of the WEC (wave energy converter) is driven by the sea-surface elevation, which is modeled by a stationary and homogeneous zero mean Gaussian stochastic process. System equations are linearized thus simplifying the numerical model of the device. The resulting response is obtained as the output of the coupled mechanic-hydrodynamic model of the device. A stochastic suboptimal controller, derived from optimal control theory, is defined and applied to ISWEC. Results of this approach have been compared with the ones obtained with a linear spring-damper controller, highlighting the capability to obtain a higher value of mean extracted power despite higher power peaks.http://dx.doi.org/10.1155/2015/980613
spellingShingle Mattia Raffero
Michele Martini
Biagio Passione
Giuliana Mattiazzo
Ermanno Giorcelli
Giovanni Bracco
Stochastic Control of Inertial Sea Wave Energy Converter
The Scientific World Journal
title Stochastic Control of Inertial Sea Wave Energy Converter
title_full Stochastic Control of Inertial Sea Wave Energy Converter
title_fullStr Stochastic Control of Inertial Sea Wave Energy Converter
title_full_unstemmed Stochastic Control of Inertial Sea Wave Energy Converter
title_short Stochastic Control of Inertial Sea Wave Energy Converter
title_sort stochastic control of inertial sea wave energy converter
url http://dx.doi.org/10.1155/2015/980613
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AT michelemartini stochasticcontrolofinertialseawaveenergyconverter
AT biagiopassione stochasticcontrolofinertialseawaveenergyconverter
AT giulianamattiazzo stochasticcontrolofinertialseawaveenergyconverter
AT ermannogiorcelli stochasticcontrolofinertialseawaveenergyconverter
AT giovannibracco stochasticcontrolofinertialseawaveenergyconverter