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Abstract

The present invention is directed to a nonlinear controller for nonlinear wave energy converters (WECs). As an example of the invention, a nonlinear dynamic model is developed for a geometrically right-circular cylinder WEC design for the heave-only motion, or a single degree-of-freedom (DOF). The linear stiffness term is replaced by a nonlinear cubic hardening spring term to demonstrate the performance of a nonlinear WEC as compared to an optimized linear WEC. By exploiting the nonlinear physics in the nonlinear controller, equivalent power and energy capture, as well as simplified operational performance is observed for the nonlinear cubic hardening spring controller when compared to an optimized linear controller.

Patent Number

10,823,134

Assignee

National Technology & Engineering Solutions of Sandia, LLC

Assignee

Michigan Technological University

Application Number

62730891

Date Filed

9-13-2018

Certificate of Correction

No

Issue Date

11-3-2020

Disciplines

Engineering Mechanics | Mechanical Engineering

Nonlinear controller for nonlinear wave energy converters

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