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System Identification of a Floating Oscillating Water Column Wave Energy Converter

[+] Author Affiliations
Brad Stappenbelt, Massimo Fiorentini, Paul Cooper, Song-Ping Zhu, Jean-Roch Nader

University of Wollongong, Wollongong, NSW, Australia

Paper No. OMAE2011-49532, pp. 521-527; 7 pages
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 5: Ocean Space Utilization; Ocean Renewable Energy
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4437-3
  • Copyright © 2011 by ASME


One of the objectives of studies regarding the performance of floating oscillating water column (OWC) wave energy conversion devices is the prediction of the heave motion of the chamber and the water column. This paper presents a method to evaluate the parameters involved in the dynamics of partially submerged bodies in order to predict the coupled movement of the chamber and the water column in the frequency domain. System identification was performed and a lumped parameter model of the heave motions of a floating OWC was proposed. A novel approach utilising the reverse SISO method was employed to allow frequency dependent parameters for both the floating structure and the oscillating water column to be determined from several forced vibration experiments. Experimental results under forced vibration and wave excitation agree reasonably well with the dynamic model established.

Copyright © 2011 by ASME



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