García-Violini, Demián and Peña-Sanchez, Yerai and Faedo, Nicolás and Bianchi, Fernando and Ringwood, John (2024) A model invalidation procedure for wave energy converters with experimental assessment and implications for control. Control Engineering Practice, 143. p. 105778. ISSN 09670661

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Abstract

Model invalidation is the process of testing assumptions of a dynamical model by comparing simulated responses with experimental data, considering any discrepancies as evidence that the model may be invalid. In this study, a model invalidation methodology is presented, to obtain robust control oriented models for wave energy converters (WECs). In particular, this methodology can deal separately with dynamical uncertainty and external noise in experimental data sets. To this end, considering linear system theory, this study proposes a methodology for building input–output data sets for WEC systems, via a two-stage approach. Model invalidation results are analysed statistically, and the practical implications of considering dynamical uncertainty in WEC system models are discussed in terms of control performance, specifically absorbed energy. As indicated by the analysis and results presented in this study, failure to include dynamic uncertainty in the analysis can lead to performance overestimation. The importance of a good dynamical description for accurate estimation of experimental control performance is highlighted. Finally, this study emphasises the need for closed-loop controllers for WEC systems that can simultaneously maximise energy and guarantee robust stability, an area currently lacking within the WEC literature.

Item Type:	Article
Keywords:	Model invalidation; Model validation; WECs; Uncertainty; Robust control; Control oriented models;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
Item ID:	18942
Identification Number:	https://doi.org/10.1016/j.conengprac.2023.105778
Depositing User:	Professor John Ringwood
Date Deposited:	27 Sep 2024 11:39
Journal or Publication Title:	Control Engineering Practice
Publisher:	Elsevier
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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