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題 名 | Flutter Control Synthesis of Thin Plates Using Active Lumped Vortex Excitations |
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作 者 | Huang, Li-jeng; Jen, Te; | 書刊名 | Journal of Aeronautics, Astronautics and Aviation. Series A |
卷 期 | 38:1 民95.03 |
頁 次 | 頁27-33 |
分類號 | 447.553 |
關鍵詞 | Aero-servo-elastic analysis; Active lumped vortex excitations; Lumped vortex method; LVM; |
語 文 | 英文(English) |
英文摘要 | This paper presents a numerical study on the flutter suppression of a two-degrees-of-freedom typical section in two-dimensional incompressible flow using active lumped vortex excitations. Unsteady aerodynamic loads induced by structural deformations and active lumped vortex excitations are calculated bye the lumped vortex method (LVM). The computational unsteady aerodynamic loads are checked with Theordorsen analytical solutions and Bratt’s experimental results. Unsteady pressure difference vortex excitations located at various positions were studied. Finally, state-feedback control of flutter was tested using different proportional gains and vortex excision positions. The results show that fluttering plate can be effectively controlled using active lumped vortex excitation with appropriate chosen feedback gains and excitation locations. The mechanism of flutter suppression is the lumped vortex excitations induced secondary unsteady aerodynamic loads effectively alleviate the structural motions induced primary flow fields through the Biot-Savart law and the satisfaction of Kelvin condition. |
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