2026-04-17T16:42:57Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/75692023-04-19T08:31:04Zcom_10259_6155com_10259_4266com_10259.4_106com_10259_2604col_10259_6156

00925njm 22002777a 4500 dc Serrano, Carlos author Sierra Garcia, Jesús Enrique author Santos, Matilde author 2022-11 Floating offshore wind turbines (FOWTs) are systems with complex and highly nonlinear dynamics; they are subjected to heavy loads, making control with classical strategies a challenge. In addition, they experience vibrations due to wind and waves. Furthermore, the control of the blade angle itself may generate vibrations. To address this issue, in this work we propose the design of an intelligent control system based on fuzzy logic to maintain the rated power of an FOWT while reducing the vibrations. A gain scheduling incremental proportional–derivative fuzzy controller is tuned by genetic algorithms (GAs) and combined with a fuzzy-lookup table to generate the pitch reference. The control gains optimized by the GA are stored in a database to ensure a proper operation for different wind and wave conditions. The software Matlab/Simulink and the simulation tool FAST are used. The latter simulates the nonlinear dynamics of a real 5 MW barge-type FOWT with irregular waves. The hybrid control strategy has been evaluated against the reference baseline controller embedded in FAST in different environmental scenarios. The comparison is assessed in terms of output power and structure stability, with up to 23% and 33% vibration suppression rate for tower top displacement and platform pitch, respectively, with the new control scheme. Fatigue damage equivalent load (DEL) of the blades has been also estimated with satisfactory results. http://hdl.handle.net/10259/7569 10.3390/jmse10111769 2077-1312 Wind energy Floating wind turbine Pitch control Fuzzy logic Structural fatigue Hybrid Optimized Fuzzy Pitch Controller of a Floating Wind Turbine with Fatigue Analysis