Department of Advanced Technology Fusion, Konkuk University, Seoul, Korea.
Bioinspir Biomim. 2011 Sep;6(3):036006. doi: 10.1088/1748-3182/6/3/036006. Epub 2011 Aug 18.
We explore the implementation of wing feather separation and lead-lagging motion to a flapping wing. A biomimetic flapping wing system with separated outer wings is designed and demonstrated. The artificial wing feather separation is implemented in the biomimetic wing by dividing the wing into inner and outer wings. The features of flapping, lead-lagging, and outer wing separation of the flapping wing system are captured by a high-speed camera for evaluation. The performance of the flapping wing system with separated outer wings is compared to that of a flapping wing system with closed outer wings in terms of forward force and downward force production. For a low flapping frequency ranging from 2.47 to 3.90 Hz, the proposed biomimetic flapping wing system shows a higher thrust and lift generation capability as demonstrated by a series of experiments. For 1.6 V application (lower frequency operation), the flapping wing system with separated wings could generate about 56% higher forward force and about 61% less downward force compared to that with closed wings, which is enough to demonstrate larger thrust and lift production capability of the separated outer wings. The experiments show that the outer parts of the separated wings are able to deform, resulting in a smaller amount of drag production during the upstroke, while still producing relatively greater lift and thrust during the downstroke.
我们探索了将翼羽分离和滞后运动应用于扑翼飞行器的实现。设计并展示了一种具有分离式外翼的仿生扑翼系统。通过将机翼分为内翼和外翼，在仿生机翼上实现了人工翼羽分离。使用高速摄像机捕捉扑翼系统的扑动、滞后和外翼分离的特征，用于评估。将具有分离式外翼的扑翼系统的性能与具有封闭外翼的扑翼系统的性能进行了比较，以评估其前向力和下向力的产生能力。对于 2.47 至 3.90 Hz 的低扑动频率范围，通过一系列实验证明，所提出的仿生扑翼系统具有更高的推力和升力产生能力。对于 1.6 V 的应用（低频操作），与具有封闭翼的系统相比，具有分离式翼的扑翼系统能够产生约 56%更高的前向力和约 61%更少的下向力，足以证明分离式外翼具有更大的推力和升力产生能力。实验表明，分离式外翼的外部分能够变形，在上冲程期间产生的阻力较小，而在下冲程期间仍然产生相对较大的升力和推力。
