基于压电作动与鲁棒控制的弯-剪耦合叶片挥舞失速颤振抑制

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摘要针对风力机叶片的挥舞断裂失效，阐述压电作动与鲁棒控制下的挥舞/横向剪切（弯-剪）耦合叶片失速颤振及主动控制过程。结构模型是在复合材料基体中嵌入压电材料的薄壁单闭室叶型截面，气动力是适合于纯变桨运动的失速气动力模型。基于Galerkin方法进行解耦处理，气动力沿叶片展长计算采用片条理论。基于压电反馈作动理论和三权值混合灵敏度H∞鲁棒控制，研究基于时域响应的稳定性分析和失速颤振抑制方法。压电反馈基于结构裁剪技术，反馈为叶尖挥舞弯曲运动。三权值鲁棒控制通过第三权值在噪声衰减中，制约输出信号大小，迫使其稳定。通过大范围变化的变桨角和铺层角条件下的特征值分析及相平面分析，验证了三权值混合灵敏度H∞鲁棒控制不失一般性。

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	刘廷瑞
	吴鸿才

关键词 ：挥舞/横向剪切耦合；失速颤振；压电作动；颤振抑制；三权值混合灵敏度H&infin, 控制

Abstract：This study is to investigate the stall flutter analysis and active control process of wind turbine blade with flap-wise bending/transverse shear coupling based on piezoelectric actuation and robust control, in order to deal with the flap-wise fracture failure of the blade. The structure is modeled as thin-walled single-cell composite section with piezoelectric patch embedded. Aerodynamic expressions are based on stall aerodynamic model suitable for pure pitch motion. Decoupling process is based on Galerkin method, with the aerodynamic calculation along spanwise blade using strip method. Stability analysis and stall flutter suppression are investigated by time domain response based on active control including piezoelectric feedback actuation and 3-weight mixed-sensitivity H∞ (3WMSH) robust control. Piezoelectric feedback control is achieved through the piezoelectrically induced flap bending motion at the blade tip based on structural tailoring technology. The 3-weight robust control through the third weight in the noise attenuation can restrict the output signal, and force it to be stable. In order to verify the 3WMSH control law of universal, a further validation of 3WMSH control concerning phase plane analysis, and the cases of variable pitch angles and ply angles of large range characterized by eigenvalue analysis, are investigated.

Key words： Flap-wise bending/transverse shear coupling stall flutter piezoelectric actuation flutter suppression 3-weight mixed-sensitivity H&infin control

收稿日期: 2016-04-20 出版日期: 2017-09-15

引用本文:

刘廷瑞，吴鸿才. 基于压电作动与鲁棒控制的弯-剪耦合叶片挥舞失速颤振抑制[J]. 振动与冲击, 2017, 36(18): 265-272.
LIU Ting-rui, WU Hong-cai. Flap-wise Stall Flutter Suppression of Bending-shear coupling Blade Based on Piezoelectric Actuation and Robust Control. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(18): 265-272.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I18/265

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