耦合的翅膀和身体的动力学增强豆娘的机动性
Coupling of the wings and the body dynamics enhances damselfly maneuverability
摘要：
在扑翼飞行中，翅膀在空气中的运动产生了控制身体运动的大部分力和扭矩。另一方面，不清楚身体运动对翅膀的影响有多大。我们通过分析三种不同种类的豆娘的快速偏转来研究这种联系。在这个结合实验和理论研究，我们表明，在低频扑翼飞行的翅膀和身体的动力学耦合在一起。因此，豆娘受益于一个被动机制，以加强双边翅膀俯仰角的不对称性，以维持身体的旋转。基于该机理建立的昆虫快速转弯运动的物理模型，可有效地将昆虫翅膀和身体的形态学、运动学和动力学联系起来。
英文摘要：
In flapping flight, motion of the wings through the air generates the majority of the force and torque that controls the body motion. On the other hand, it is not clear how much effect the body motion imposes on the wings. We investigated this connection via analyzing fast yaw turns of three different species of damselfly. In this combined experimental and theoretical study, we show that the dynamics of the wings and the body are coupled together in low frequency flapping flight. As a result, damselflies benefit from a passive mechanism for enhancing the bilateral wing pitch angle asymmetry to sustain the body rotation. A physics-based model derived from this mechanism is proved valid for linking morphology, kinematics and dynamics of the wing and the body of the flying insects in fast turning maneuvers.
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