Active gyroscopic stabilizer to mitigate vibration in a multimegawatt wind turbine

Abstract

One of the main concerns in developing large wind turbines, especially offshore, is their cost‐effectiveness versus traditional power sources. Significant dynamic loads are applied to the tower and the foundation of a multimegawatt wind turbine. Any reduction in the loads can reduce the size of the structure and, consequently, the turbine's cost. In this paper, a novel structural control application is proposed to mitigate the transmitted vibrations to a multimegawatt turbine tower to decrease the tower base shear forces and overturning moments. For this purpose, a hybrid passive/active gyro stabilizer is designed and incorporated into the NREL baseline 5‐MW wind turbine. Furthermore, two controllers, including a proportional integral differential (PID), as the baseline controller, and a nonlinear fuzzy logic controller (FLC) as the main and nonlinear controllers, have been designed and implemented to the turbine model. The structural control systems are implemented into the turbine model by cosimulating ADAMS and Simulink. The results reveal that the application of the proposed stabilizer can significantly reduce the overturning moment at the base of the tower compared to the reference NREL 5‐MW model.

Investigation and optimization of a pre‐stressed tuned mass damper for wind turbine tower

“…To simplify the calculation of wind turbine tower model, the coupling vibration effect of the tower and three blades, as well as the soil-structure interaction, are ignored in this paper under wind excitations, 16,17 so the blade and the nacelle can be viewed as a concentrated mass M at the top of the tower as shown in Figure 2b. Under this situation, the WTT can be simplified as a tapered tubular cantilever beam.…”

Experimental studies of the influence of elastic-dissipative parameters of engine mounting units on the dynamic characteristics of the “wing model – elastic pylon – engine” system

“…Special elastomeric damping hardware elements are also implied in the mounting sys-tem. In this case the gyroscopic and dynamic functions of elastic oscillations dissipator in "wing -elastic pylon -engine" system are joined in the engine [10][11][12][13][14][15]. The results of experiments on the oscillation dissipation method principal materialization opportunity and efficiency are presented in the following article.…”