关键词: 振动与波, 风力发电机, 气动弹性, 颤振抑制, 模型预测控制, 风速分布

Abstract:

Flutter as an important problem of blade failure has always been the focus of wind power research. To restrain blade flutter in the process of blade work, the actual wind speed distribution, especially the influence of wind shear and tower shadow on blade vibration, should be fully considered for establishing analysis model, and discretized to obtain the average input wind speed. This study is to consider stall flutter with high frequency and amplitude under conditions of nonlinear aerodynamic action, large wind speed and big angle of attack for comprehensive analysis of aeroelastic stability of small-scale wind turbine blades of the real structure, and simulate the typical section vibration. The vibration frequencies and amplitudes of two displacements of both flap-wise and lead-lag motions are controlled by rolling optimization and error correction of model predictive control. The results show that the controlled vibrations can be stable in a short time, with the static error being accepted.