Raptor wing morphing with flight speed.
Raptor wing morphing with flight speed.
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DOI：
10.1098/rsif.2021.0349
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发表时间：
2021-07
期刊：
影响因子：
--
通讯作者：
Bomphrey RJ
中科院分区：
文献类型：
--
作者：
Cheney JA;Stevenson JPJ;Durston NE;Maeda M;Song J;Megson-Smith DA;Windsor SP;Usherwood JR;Bomphrey RJ
在滑翔飞行中，鸟类通过改变翅膀和尾巴的形状来控制飞行轨迹和速度。使用高分辨率的视频测量，我们重建了准确和详细的三维几何形状的滑翔飞行的三个猛禽（仓鸮，草鸮;茶色猫头鹰，Strix aluco，和苍鹰，Accipiter generally）。机翼形状高度可重复，肩部驱动是重新配置整个平面形状和控制迎角的关键组成部分。这三种鸟有着共同的展向机翼扭曲模式，扭曲与最高弯度成反比关系，并且在下反角构型中，它们的翅膀在肩膀以下凹陷。随着速度的增加，所有三只鸟都倾向于减少整个翅膀的弧度，它们的翅膀弯曲成马鞍形。许多变形特征表明，机翼和尾翼的协调运动支持有效的飞行，并且尾翼可以通过间接气动弹性控制来调节机翼外倾角。
In gliding flight, birds morph their wings and tails to control their flight trajectory and speed. Using high-resolution videogrammetry, we reconstructed accurate and detailed three-dimensional geometries of gliding flights for three raptors (barn owl, Tyto alba; tawny owl, Strix aluco, and goshawk, Accipiter gentilis). Wing shapes were highly repeatable and shoulder actuation was a key component of reconfiguring the overall planform and controlling angle of attack. The three birds shared common spanwise patterns of wing twist, an inverse relationship between twist and peak camber, and held their wings depressed below their shoulder in an anhedral configuration. With increased speed, all three birds tended to reduce camber throughout the wing, and their wings bent in a saddle-shape pattern. A number of morphing features suggest that the coordinated movements of the wing and tail support efficient flight, and that the tail may act to modulate wing camber through indirect aeroelastic control.
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影响因子：
2.8
作者：
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作者：
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