Open-Loop Control of Adjustable Tuned Mass Dampers for Floating Wind Turbine Platforms: Paper No. ISOPE-I-21-1219

Daniel Zalkind, Matt Shields, Eben Lenfest, Andrew Goupee, Christopher Allen

Research output: Contribution to conferencePaper

1 Scopus Citations


In this study, we demonstrate the ability of adjustable tuned mass dampers (TMDs) to reduce the platform motion of floating offshore wind turbines (FOWTs). The TMDs are located in the hull and provide control authority by varying the amount of water ballast and compressed air in a reservoir over time. The optimal TMD settings depend on the wind and wave conditions of the FOWT. We present an open-loop control scheme that changes the TMD natural frequency based on sea state and a simple method for estimating the peak wave period and significant wave height. The performance of this open-loop control is compared to ideal control of the TMDs (set knowing the exact sea state), a TMD with a constant natural frequency targeting the design load case with the greatest platform motion, and a baseline set of simulations of the platform without TMDs. The constant natural frequency case performs nearly as effectively as the actively controlled case, suggesting that the TMDs can be simply designed for extreme load conditions and provide consistent control over a range of environments; however, the methods used to find the optimal TMD parameters and estimate sea state statistics could be used in other aspects of FOWT control and design.
Original languageAmerican English
Number of pages6
StatePublished - 2021
Event31st International Ocean and Polar Engineering Conference - Rhodes, Greece
Duration: 20 Jun 202125 Jun 2021


Conference31st International Ocean and Polar Engineering Conference
CityRhodes, Greece

Bibliographical note

See NREL/CP-5000-78839 for preprint

NREL Publication Number

  • NREL/CP-5000-81109


  • artificial intelligence
  • DLC 6
  • FOWT
  • peak period
  • renewable energy
  • simulation
  • subsea system
  • sustainability
  • sustainable development
  • wind energy


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