风力机叶片等效悬臂梁模糊PID控制

Wind Turbine Blades is Equivalent to a Cantilever Beam Controlled by Fuzzy PID

针对嵌有复合材料的风力机叶片,其振动以挥舞为主要形式,能量主要集中在一阶、二阶,采用压电纤维作为敏感执行器件,组成压电智能控制系统,对风力机叶片振动进行研究。将风力机叶片等效为悬臂梁,基于压电材料的压电本构方程以及压电智能悬臂梁状态空间方程,采用模糊控制实现PID参数自整定,进行振动抑制并采用MATLAB进行值仿真,结果表明模糊PID在振动抑制上比普通PID有更好的自适应性,能够实现参数自动调整。

For the wind turbine blade embedded with composite materials,the vibration is mainly in the form of waving,and the energy is mainly concentrated in the first and second order.Piezoelectric fiber is used as the sensitive actuator to form the piezoelectric intelligent control system to study the vibration of wind turbine blade.The wind turbine blade is equivalent to a cantilever beam.Based on the piezoelectric constitutive equation of piezoelectric material and the state space equation of piezoelectric intelligent cantilever beam,the fuzzy control is used to realize PID parameter self-tuning and vibration suppression.The simulation results with MATLAB show that the fuzzy PID has better adaptability than the ordinary PID in vibration suppression and can realize automatic parameter adjustment.