FIXED-TIME VIBRATION REDUCTION CONTROL OF UNDERACTUATED OFFSHORE FLOATING WIND TURBINES UNDER COUPLING EFFECT OF WIND AND WAVE

Chen Yifeng; Hu Shengqing; Kou Yanni; Chen Lin; Peng Xiaoqiang; Zhang Yangming

doi:10.19912/j.0254-0096.tynxb.2025-0459

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (8) : 602-610. DOI: 10.19912/j.0254-0096.tynxb.2025-0459

FIXED-TIME VIBRATION REDUCTION CONTROL OF UNDERACTUATED OFFSHORE FLOATING WIND TURBINES UNDER COUPLING EFFECT OF WIND AND WAVE

Chen Yifeng¹, Hu Shengqing², Kou Yanni², Chen Lin¹, Peng Xiaoqiang², Zhang Yangming¹

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Abstract

The vibration control issue of an offshore floating wind turbine is considered, an efficient and precise vibration control method is proposed based on the fixed-time approach, where the tuned mass damper （TMD） is installed in the nacelle of the offshore floating wind turbine. A coupled dynamic model of the offshore floating wind turbine is established according to the Lagrange equations. To address the adverse effects of wind and wave disturbances, a fixed-time nonlinear disturbance observer is constructed to accurately estimate and compensate the wind and wave disturbances separately. Based on this, the intermediate control inputs are introduced to solve the underactuated problem, and a fixed-time active vibration controller is designed for each subsystem of the offshore floating wind turbine to achieve the efficient vibration suppression. The fixed-time stability of the closed-loop system is proven by using Lyapunov methods. Simulation results are provided to verify the feasibility and effectiveness of the designed disturbance observer and vibration reduction controller.

Key words

floating wind turbines / vibration control / disturbance rejection / fixed-time control / tuned mass damper（TMD） / fixed-time convergence / disturbance observer

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Chen Yifeng, Hu Shengqing, Kou Yanni, Chen Lin, Peng Xiaoqiang, Zhang Yangming. FIXED-TIME VIBRATION REDUCTION CONTROL OF UNDERACTUATED OFFSHORE FLOATING WIND TURBINES UNDER COUPLING EFFECT OF WIND AND WAVE[J]. Acta Energiae Solaris Sinica. 2026, 47(8): 602-610 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0459

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