Bionic winglet structure capable of changing streaming of leading edge airfoil surface of flapping-wing aircraft

Abstract

The invention discloses a bionic winglet structure capable of changing streaming of a leading edge airfoil surface of a flapping-wing aircraft, which relates to the field of structures of aircraft wings. The structural characteristics, the movement mode and the aerodynamic performance of the flapping-wing aircraft completely imitating small wing feathers of birds are provided, so that the aerodynamics of the flapping-wing aircraft is effectively improved, and the stall delay effect is achieved by changing the flow around the leading edge airfoil surface; the bionic winglet structure capable of changing the streaming of the leading edge airfoil surface of the flapping-wing aircraft enables the aircraft to take off and land more steadily. The bionic winglet structure comprises a pair of winglets and a winglet control mechanism; the two winglets are symmetrically arranged along the aircraft body and synchronously rotate under the driving of the winglet control mechanism. The flapping-wing aircraft has good aerodynamic performance and streaming characteristic in the flight process, the stall delaying function can be achieved, and due to the special structural design, the weight increased by the mechanism and the rotational inertia increased by wings can be ignored.

Description

technical field [0001] The invention relates to the structural field of aircraft wings, in particular to a bionic small winglet structure capable of changing the flow around the leading edge of a flapping-wing aircraft. Background technique [0002] The flapping-wing aircraft is a new type of aircraft that imitates the flight of birds or insects. Compared with the flight methods of fixed wings and rotors, the flapping-wing flight is more flexible. According to the different wings, it can be divided into a single section that imitates small birds. wing and a two-section wing modeled after a large bird. In nature, the small wing feather structure on the bird's wing opens to delay the stall when it lands, but the current research field of flapping wing aircraft cannot guarantee its lift force well when it takes off and lands. On this basis, it is difficult to solve the problem of adding a bionic small wing feather structure to the flapping wing aircraft based on the small wing...

AI Technical Summary

Problems solved by technology

Another difficulty in designing a bionic wing on a flapping-wing aircraft is that the load capacity of the flapping-wing aircraft is limited. Adding too many driving devices to realize the function will also increase the weight of the whole machine, and adding mass to the wing structure will increase the rotation Inertia affects lift

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