Nonlinear controller for nonlinear wave energy converters
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.
- Inventors:
- Issue Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1771583
- Patent Number(s):
- 10823134
- Application Number:
- 16/534,746
- Assignee:
- National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM); Michigan Technological University (Houghton, MI)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03B - MACHINES OR ENGINES FOR LIQUIDS
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05B - INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
- DOE Contract Number:
- NA0003525
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 08/07/2019
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Wilson, David G., Bacelli, Giorgio, Robinett, III, Rush D., and Abdelkhalik, Ossama. Nonlinear controller for nonlinear wave energy converters. United States: N. p., 2020.
Web.
Wilson, David G., Bacelli, Giorgio, Robinett, III, Rush D., & Abdelkhalik, Ossama. Nonlinear controller for nonlinear wave energy converters. United States.
Wilson, David G., Bacelli, Giorgio, Robinett, III, Rush D., and Abdelkhalik, Ossama. Tue .
"Nonlinear controller for nonlinear wave energy converters". United States. https://www.osti.gov/servlets/purl/1771583.
@article{osti_1771583,
title = {Nonlinear controller for nonlinear wave energy converters},
author = {Wilson, David G. and Bacelli, Giorgio and Robinett, III, Rush D. and Abdelkhalik, Ossama},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 03 00:00:00 EST 2020},
month = {Tue Nov 03 00:00:00 EST 2020}
}
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