弯扭耦合风力机叶片的准稳态响应及LLTR控制

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (13) : 123-129.

论文

刘廷瑞，常林

作者信息 +

Quasi-steady response and LLTR control of a wind turbine blade with bending-torsion coupled

LIU Ting-rui, CHANG Lin

Author information +

文章历史 +

摘要

为解决弯扭耦合复合材料薄壁叶片的发散不稳定问题，阐述了风力机叶片准稳态响应及基于回路传输恢复的LQG (LQG with Loop Transfer Recovery, LLTR) 理论控制过程。叶片结构模型是基于周向反对称刚度铺层的复合材料薄壁单闭室翼型；翼型的中线轨迹是S809Ⅱ 翼型型线。从直升机叶片的失速气动力模型中提取了一种准稳态气动力模型，经过修正后适合于风力机叶片经典颤振和失速颤振临界状态的研究。分别详细研究了基于输入端回路传输恢复及输出端回路传输恢复两种情况下的LLTR控制，并通过弯扭时域响应和控制器响应的数字仿真比较以及奇异值伯德图曲线对比，论证了LLTR控制算法的稳定性及在颤振抑制方面的优越性。控制算法的实时效应也通过半实物仿真实验平台得到了检验。

Abstract

Quasi-steady responses of a wind turbine blade and its theoretical control process based on LQG with loop transfer recovery (LLTR) were studied to solve divergent instability of a composite thin-walled blade with bending-torsion coupled. The blade structure was modeled as a thin-walled single closed chamber airfoil based on laminated composite with circumferential asymmetric stiffness. The middle-line trajectory of the airfoil was the S809Ⅱairfoil type line. A quasi-steady aerodynamic model was extracted from stall aerodynamic models of helicopter blade, and after modified it was suitable for studying critical states of classical flutter and stall flutter of wind turbine blade. The LLTR control in two cases of input loop-based transfer recovery and output loop-based transfer recovery was investigated in detail. Through comparing the blade’s bending-torsion coupled responses with simulated controller responses and singular value Bode diagram, the stability of the LLTR control algorithm and its superiority in flutter suppression were verified. The real-time effects of the LLTR control algorithm were also examined with a hardware-in-the-loop simulation platform.

导出引用

刘廷瑞，常林. 弯扭耦合风力机叶片的准稳态响应及LLTR控制[J]. 振动与冲击, 2018, 37(13): 123-129

LIU Ting-rui, CHANG Lin. Quasi-steady response and LLTR control of a wind turbine blade with bending-torsion coupled[J]. Journal of Vibration and Shock, 2018, 37(13): 123-129

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