The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 2019
Filed:
Mar. 22, 2017
National Technology & Engineering Solutions of Sandia, Llc, Albuquerque, NM (US);
Michigan Technological University, Houghton, MI (US);
South Dakota Board of Regents, Pierre, SD (US);
Ossama Abdelkhalik, Houghton, MI (US);
Rush D. Robinett, III, Tijeras, NM (US);
Shangyan Zou, Houghton, MI (US);
Giorgio Bacelli, Albuquerque, NM (US);
David G. Wilson, Tijeras, NM (US);
Umesh Korde, Hancock, MI (US);
National Technology & Engineering Solutions of Sandia, LLC, Albuquerque, NM (US);
Michigan Technological University, Houghton, MI (US);
South Dakota Board of Regents, Pierre, SD (US);
Abstract
A wave energy converter and method for extracting energy from water waves maximizes the energy extraction per cycle by estimating an excitation force of heave wave motion on the buoy, computing a control force from the estimated excitation force using a dynamic model, and applying the computed control force to the buoy to extract energy from the heave wave motion. Analysis and numerical simulations demonstrate that the optimal control of a heave wave energy converter is, in general, in the form of a bang-singular-bang control; in which the optimal control at a given time can be either in the singular arc mode or in the bang-bang mode. The excitation force and its derivatives at the current time can be obtained through an estimator, for example, using measurements of pressures on the surface of the buoy in addition to measurements of the buoy position. A main advantage of this approximation method is the ease of obtaining accurate measurements for pressure on the buoy surface and for buoy position, compared to wave elevation measurements.