Efficiency-aware nonlinear model-predictive control with real-time iteration scheme for wave energy converters

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dc.contributor.authorGuerrero-Fernandez, Juan L.
dc.contributor.authorGonzález-Villarreal, Oscar J.
dc.contributor.authorRossiter, John Anthony
dc.date.accessioned2022-06-16T12:53:00Z
dc.date.available2022-06-16T12:53:00Z
dc.date.issued2022-05-26
dc.description.abstractSeveral solutions have been proposed in the literature to maximise the harvested ocean energy, but only a few consider the overall efficiency of the power take-off system. The fundamental problem of incorporating the power take-off system efficiency is that it leads to a nonlinear and non-convex optimal control problem. The main disadvantage of the available solutions is that none solve the optimal control problem in real-time. This paper presents a nonlinear model predictive control (NMPC) approach based on the real-time iteration (RTI) scheme to incorporate the power take-off system's efficiency when solving the optimal control problem at each time step in a control law aimed at maximising the energy extracted. The second contribution of this paper is the derivation of a condensing algorithm O(N2) for ‘output-only’ cost functions required to improve computational efficiency. Finally, the RTI-NMPC approach is tested using a scaled model of the Wavestar design, demonstrating the benefit of this new control formulation.en_UK
dc.identifier.citationGuerrero-Fernandez JL, González-Villarreal OJ, Rossiter JA. (2022) Efficiency-aware nonlinear model-predictive control with real-time iteration scheme for wave energy converters, International Journal of Control, Volume 96, Issue 8, pp. 1909-1921en_UK
dc.identifier.eissn1366-5820
dc.identifier.issn0020-7179
dc.identifier.urihttps://doi.org/10.1080/00207179.2022.2078424
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/18034
dc.language.isoenen_UK
dc.publisherTaylor & Francisen_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectWave energy convertersen_UK
dc.subjectnonlinear model predictive controlleren_UK
dc.subjectreal-time iterationen_UK
dc.subjectpower take-off-system efficiencyen_UK
dc.subjectcondensing algorithm O(N2)en_UK
dc.titleEfficiency-aware nonlinear model-predictive control with real-time iteration scheme for wave energy convertersen_UK
dc.typeArticleen_UK

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