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Full-Text Articles in Ocean Engineering
Sliding Mode Control Of A Nonlinear Wave Energy Converter Model, Tania Demonte Gonzalez
Sliding Mode Control Of A Nonlinear Wave Energy Converter Model, Tania Demonte Gonzalez
Dissertations, Master's Theses and Master's Reports
The most accurate wave energy converter models for heaving point absorbers include nonlinearities, which increase as resonance is achieved to maximize energy capture. The efficiency of wave energy converters can be enhanced by employing a control scheme that accounts for these nonlinearities. This project proposes a sliding mode control for a heaving point absorber that includes the nonlinear effects of the Froude-Krylov force. The sliding mode controller tracks a reference velocity that matches the phase of the excitation force to ensure higher energy absorption. This control algorithm is tested in regular linear waves and is compared to a complex-conjugate control …
Optimization Of Shape And Control Of Linear And Nonlinear Wave Energy Converters, Jiajun Song
Optimization Of Shape And Control Of Linear And Nonlinear Wave Energy Converters, Jiajun Song
Dissertations, Master's Theses and Master's Reports
In this dissertation, we address the optimal control and shape optimization of Wave Energy Converters. The wave energy converters considered in this study are the single-body heaving wave energy converters, and the two-body heaving wave energy converters. Different types of wave energy converters are modeled mathematically, and different optimal controls are developed for them. The concept of shape optimization is introduced in this dissertation; the goal is to leverage nonlinear hydrodynamic forces which are dependent on the buoy shape. In this dissertation, shape optimization is carried out and its impact on energy extraction is investigated. In all the studies conducted …