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Silva, Josefredo G., Lacerda, Marcio J., Costa, Matheus and Nepomuceno, Erivelton (2026) Towards uncertainty-quantified data-driven modelling and robust control of a wave energy converter prototype. Ocean Engineering, 354(1) (124745). pp. 1-12. ISSN 1873-5258
This paper presents a novel unconstrained, causal, and robust H2-norm-based control framework for wave energy converters. A data-driven model obtained from experimental measurements on a 1:20-scale Wavestar-type prototype is employed, and model uncertainty is captured through a polytopic parametrisation that defines the structure of the controlled system. Based on Lyapunov theory and Finsler’s Lemma, the control synthesis conditions are formulated as linear matrix inequalities evaluated at the vertices of the polytope. The proposed controller aims to maximise energy extraction by capturing the average closed-loop energy response, providing an effective strategy for control under stochastic, broadband wave conditions. Numerical experiments demonstrate that the controller achieves efficient energy capture without violating physical constraints and outperforms the reactive, passive, and H∞ benchmark controllers.
Available under License Creative Commons Attribution 4.0.
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