基于调谐质量阻尼器的风力机叶片振动分散控制研究

DECENTRALIZED CONTROL OF VIBRATIONS IN WIND TURBINE BLADES USING MULTIPLE ACTIVE TUNED MASS DAMPER

针对叶片面内方向振动控制问题,考虑叶片面内与面外振动的耦合,采用欧拉-拉格朗日法建立分布式参数叶片的动力学模型。阻尼装置采用在叶片内部分散布置的多个主动调谐质量阻尼器(TMD),由叶片及TMD的速度反馈信号控制。旋转导致叶片的时变刚度由参数不确定性描述,基于稳定性原理设计鲁棒分散控制器。在Matlab平台建立NREL 5 MW机组模型进行数值仿真,结果显示基于局部执行器和传感器的鲁棒分散控制策略能有效减小叶片面内振动。

In order to control the vibration in the in-plane direction of the blade,the dynamic model of the distributed parameter blade is established by using the Euler-Lagrangian method which considers the coupling of in-plane and out-of-plane dynamics. Multi-active tuning mass dampers(TMD)are decentralized inside the blade as damping device. The additional actuator force is controlled using output feedback from the blade velocity signal in which location of the damper installed and the relative velocity of the damper. The time-varying stiffness caused by rotating is described by parameter uncertainties. Robust decentralized controller is proposed based on Lyapunov stability theorem. The National Renewable Energy Laboratory 5-MW wind turbine is selected to verify the effectiveness of the decentralized control in Matlab. Numerical simulations demonstrate the robust decentralized control effectively reduce vibrations.