A multi-degree-of-freedom bird-like flapping wing aircraft

Abstract

The invention relates to a multi-freedom degree bird-like flapping wing air vehicle. The multi-freedom degree bird-like flapping wing air vehicle comprises a driving mechanism, two twisting mechanisms, an empennage mechanism, two flexible joint structures and a machine frame. The multi-freedom degree bird-like flapping wing air vehicle is simple and compact in structure, and fully-symmetrical flapping wing movement can be realized. Two rubber flexible grooved mechanisms are arranged, so that the flapping wing air vehicle can fly like a bird; flapping wings are curved and folded, so that when the flapping wings flap upwards, a stressed area is reduced, and the resistance is reduced; when the flapping wings flap downwards, the wing extending area is the largest; besides, outer wings can also be passively bent in a flight direction by air resistance, so that great lifting force and great thrust are generated; steering engines are adopted to control inner wing rods so as to change the elevation angle of the flapping wings, the multi-freedom degree bird-like flapping wing air vehicle conforms to the effect that upward flapping resistance is less than downward flapping lifting force in aerodynamics, and the aerodynamic efficiency is improved; the two steering engines are utilized to control the deflection of the empennage, so that operating and controlling of the flight attitude of the flapping wing air vehicle are facilitated. The multi-freedom degree bird-like flapping wing air vehicle disclosed by the invention can be used in the fields of models, aerial photography monitoring, information collecting, disaster searching and rescuing, airport bird expelling and the like.

Description

technical field [0001] The invention relates to the technical field of a flapping-wing aircraft, in particular to a multi-degree-of-freedom bird-like flapping-wing aircraft. Background technique [0002] The bird-like flapping-wing aircraft is a new type of aircraft that imitates the flight of birds. Compared with traditional fixed-wing and rotary-wing aircraft, it can achieve rapid take-off, acceleration and hovering, and has a high degree of maneuverability, concealment and flexibility. , has broad application prospects in both national defense and civilian applications. [0003] The flapping flight of birds in nature is mainly composed of three basic movements: swinging up and down, twisting and bending and folding. Combined with the flight characteristics of birds, the up and down swing movement is organically combined with the twisting movement, bending and folding movement, so that the flapping wing can generate greater lift and thrust, which can improve aerodynamic e...

AI Technical Summary

Problems solved by technology

Chinese patent CN 103482064A adopts a bird-like two-stage flapping wing, and joints are used at the joints of the inner and outer wings to hinge, basically realizing the up and down flapping and the bending and folding of the outer wings, which can imitate the flight process of birds to a certain extent, but this inner and outer It is difficult to control the joint hinge structure of the wing

Chinese patent CN 101417708A divides the flapping wing surface into inner and outer wing sections, and controls the folding angle of the front and rear wing sections by setting angle limiters on the front and rear wing ribs, so as to realize the torsion phenomenon during the flapping process of the flapping wing. The disadvantage is that the angle of attack of the flapping wing can only be set at a fixed value by setting the angle limiter, and it cannot be adjusted flexibly according to the incoming flow velocity

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