Shortening the prediction horizon to reduce the non causality of the optimal control for a point absorber WEC

摘要: In our days, wave energy still remains an important resource of renewable that has not been yet completely exploited and fully understood. Various prototypes point absorbers have already tested numerically experimentally in wavetanks or real sea, but only a few them reach the full scale prototype stage. For family based on oscillating bodies principle, production may be enhanced by motion control. The choice particular mode control decisive design is closely linked to mechanism architecture. It shown [1] theoretical maximum absorption can reached bringing system into resonance applying so called ”complexconjugate” control. Several sub optimal strategies derived from this observation, trying overcome drawbacks method, mainly non-causality [3]. Non-causality implies one needs predict excitation signal near future optimize control command. The aim present study propose new methodology reduce prediction horizon needed apply complex-conjugate Afterwards, simplification made leading causal non-adaptive study, cylindrical buoy constrained move heave employed test aforementioned control. Numerical comparisons are under regular irregular waves with performance classical method. method shows good capacity for broad range frequency without having adapt regulator unit incident waves.