Design and development of coaxial four-wing flapping wing aircraft
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摘要:
隐蔽抵近目标完成侦察、窃听等任务对扑翼飞行器微型化和可控飞行提出了更高要求。针对单曲柄双摇杆扑动机构存在的问题,设计了一种单轴式双曲柄双摇杆共轴四翅扑动机构,采用理论分析方法,研究了一个扑动周期内左右两对翅膀扑动角的对称性。结果表明:该共轴四翅扑动机构使得左右扑动杆存在一定的瞬时对称性差异(最大差异值约2.7°),左侧和右侧整体扑动角幅值均为36.6°,左侧和右侧整体平均扑动角均为15°,扑动机构具有很好的整体对称性和横向稳定性。研制了可模块化组装的共轴四翅扑翼样机,进行了飞行测试。样机可完成手抛或“悬停”起飞、前飞、爬升、转弯、盘旋等。研究结果对开发更加隐蔽和微型化的扑翼飞行器提供了重要的设计参考。
Abstract:Special tasks such as reconnaissance and eavesdropping poses higher requirements for the miniaturization and controllable flight of flapping wing aircraft. A single axis double-crank double-rocker coaxial four-wing flapping mechanism is designed based on a single-crank double-rocker flapping mechanism. According to the kinematics of the mechanism, the symmetry of the flapping angles of the left and right wings during one flapping cycle is analyzed. This flapping mechanism causes a certain instantaneous symmetry difference between the left and right flapping rods. However, the difference is very small, with a maximum value of about 2.7 degrees. The overall flapping angle amplitudes of the left and right sides are 36.6 degrees, and the average flapping angles of the left and right sides are 15 degrees. This flapping mechanism has good overall symmetry and lateral stability. A modular assembly coaxial four-wing flapping wing prototype is developed and flight tests are conducted. The prototype can perform maneuvers such as hand throwing or “hovering” taking-off, forward flight, climbing, turning, and circle flight. Research results provide important design reference for developing flapping wing aircraft with multiple pairs of wings to achieve more concealment and miniaturization.
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Key words:
- coaxial /
- four-wing flapping wing /
- flapping mechanism /
- crank rocker /
- modular assemble
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表 1 四翅的φol, φml, φmax和φmin
Table 1. φol, φml, φmax and φmin of the four wings
摇杆 扑动角/(°) φmax/(°) φmin/(°) φo/(°) φm/(°) DEl φ1l 14.1 −22.5 18.3 −4.2 DEr φ1r 14.1 −22.5 18.3 −4.2 DFl φ2l 52.5 15.9 18.3 34.2 DFr φ2r 52.5 15.9 18.3 34.2 表 2 样机设计参数
Table 2. Design parameters of prototype
m/g c/mm b/mm λ f/Hz Pmin/W 20 28 200 7 14 6.5 -
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