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Multi-resonant control of a 3 degree-of-freedom (heave-pitch-surge) wave energy converter enables energy capture that can be in the order of three times the energy capture of a heave-only wave energy converter. The invention uses a time domain feedback control strategy that is optimal based on the criteria of complex conjugate control. The multi-resonant control can also be used to shift the harvested energy from one of the coupled modes to another, enabling the elimination of one of the actuators otherwise required in a 3 degree-of-freedom wave energy converter. This feedback control strategy does not require wave prediction; it only requires the measurement of the buoy position and velocity.
US 10,488,828 B2
National Technology & Engineering Solutions of Sandia, LLC
Michigan Technological University
South Dakota Board of Regents
Certificate of Correction
Engineering Mechanics | Mechanical Engineering
Abdelkhalik, Ossama; Zou, Shangyan; Robinett, Rush D. III; Wilson, David G.; Bacelli, Giorgio; Coe, Ryan G.; and Korde, Umesh, "Multi-resonant feedback control of multiple degree-of-freedom wave energy converters" (2019). Michigan Tech Patents. 146.
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