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

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.

Inventors:
; ; ; ;
Issue Date:
Research Org.:
National Technology & Engineering Solutions of Sandia, LLC, Albuquerque, NM (United States); Michigan Technological Univ., Houghton, MI (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1576282
Patent Number(s):
10,423,126
Application Number:
15/830,752
Assignee:
National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM); Michigan Technological University (Houghton, MI)
DOE Contract Number:  
NA0003525
Resource Type:
Patent
Resource Relation:
Patent File Date: 2017 Dec 04
Country of Publication:
United States
Language:
English

Citation Formats

Wilson, David G., Robinett, III, Rush D., Abdelkhalik, Ossama, Song, Jiajun, and Bacelli, Giorgio. Multi-resonant feedback control of a single degree-of-freedom wave energy converter. United States: N. p., 2019. Web.
Wilson, David G., Robinett, III, Rush D., Abdelkhalik, Ossama, Song, Jiajun, & Bacelli, Giorgio. Multi-resonant feedback control of a single degree-of-freedom wave energy converter. United States.
Wilson, David G., Robinett, III, Rush D., Abdelkhalik, Ossama, Song, Jiajun, and Bacelli, Giorgio. Tue . "Multi-resonant feedback control of a single degree-of-freedom wave energy converter". United States. https://www.osti.gov/servlets/purl/1576282.
@article{osti_1576282,
title = {Multi-resonant feedback control of a single degree-of-freedom wave energy converter},
author = {Wilson, David G. and Robinett, III, Rush D. and Abdelkhalik, Ossama and Song, Jiajun and Bacelli, Giorgio},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {9}
}

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Works referenced in this record:

Controller for a wave energy converter
patent, September 2015