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Active Platform Stabilization of Floating Offshore Wind Turbines Under Harsh Marine Environments
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DOI：10.1109/joe.2026.3695322.png)
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Abstract
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This article investigates posture control strategies for floating offshore wind turbines operating in harsh marine environments. A novel thruster-assisted triangular platform is modeled using a four-degree-of-freedom representation that captures heave, roll, pitch, and tower deflection dynamics. To facilitate controller synthesis, a reduced three-degree-of-freedom model is derived and employed to design a sliding-mode controller that integrates equivalent control with a supertwisting algorithm. The proposed scheme enhances robustness and stability under significant wind and wave disturbances. Numerical simulations conducted under calm, moderate, and severe sea states demonstrate that the proposed sliding-mode controller substantially outperforms a conventional proportional–integral controller, yielding marked reductions in platform oscillations and improved transient behavior. The enhanced vibration attenuation and faster stabilization indicate that the proposed integrated approach can effectively improve energy capture efficiency and extend the operational lifespan of floating offshore wind turbines, supporting its suitability for deep-sea deployment.
Keywords:
Deep-sea wind energy
floating offshore wind turbine (FOWT)
modeling
sliding-mode control
vibration suppression
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