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Abstract

A multi-resonant wide band controller decomposes the wave energy converter control problem into sub-problems; an independent single-frequency controller is used for each sub-problem. Thus, each sub-problem controller can be optimized independently. The feedback control enables actual time-domain realization of multi-frequency complex conjugate control. The feedback strategy requires only measurements of the buoy position and velocity. No knowledge of excitation force, wave measurements, nor wave prediction is needed. As an example, the feedback signal processing can be carried out using Fast Fourier Transform with Hanning windows and optimization of amplitudes and phases. Given that the output signal is decomposed into individual frequencies, the implementation of the control is very simple, yet generates energy similar to the complex conjugate control.

Patent Number

10,423,126

Assignee

National Technology & Engineering Solutions of Sandia, LLC

Assignee

Michigan Technological University

Application Number

15/830,752

Date Filed

12-4-2017

Certificate of Correction

No

Issue Date

9-24-2019

Disciplines

Engineering Mechanics | Mechanical Engineering

Multi-resonant feedback control of a single degree-of-freedom wave energy converter

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