A low-frequency flapping wing aircraft imitating large birds

Abstract

The invention relates to a large bird-imitating low-frequency ornithopter which comprises a rack (1), a gear crank-rocker mechanism (2), a left flapping wing system (3) and a right flapping wing system (4), wherein the left flapping wing system (3) and the right flapping wing system (4) are respectively positioned at two sides of the rack (1) and are connected with the gear crank-rocker mechanism (2) by virtue of the rack (1). According to the large bird-imitating low-frequency ornithopter, two stages of gears consisting of two sets of large gears and small gears are for gearing-down transmission firstly and then a left flapping wing and a right flapping wing are respectively driven by virtue of the gear crank-rocker mechanism, thus low-frequency flapping is realized. Compared with the prior art, the large bird-imitating low-frequency ornithopter has the advantages that by virtue of a special design of the left flapping wing and the right flapping wing, the rotating and the downward folding are realized in a flapping process, thus a flying process of large birds is imitated very well, and the lift force and the thrust in a lift flapping process are favorably improved.

Description

technical field [0001] The invention relates to a flapping-wing aircraft, in particular to a low-frequency flapping-wing aircraft imitating a large bird. Background technique [0002] The flapping-wing flight mode widely exists in the flight of flying creatures in nature. The flapping-wing flight includes the advantages of fixed-wing flight and rotary-wing flight. It can take off, accelerate and hover quickly, and has high maneuverability and flexibility. The flight modes of flying creatures can be roughly divided into three categories: low-frequency flapping flight, such as many large birds (hawks, vultures, wild geese, seagulls, swans, etc.), with longer and larger wingspan and low flapping frequency, It ranges from zero to tens of hertz, using low-frequency flapping and gliding in the form of flapping; intermediate-frequency flapping flight, mainly for medium-sized birds (such as swallows, sparrows, pigeons, etc.) Large, the flapping frequency is relatively high, and gli...

AI Technical Summary

Problems solved by technology

[0004] At present, the design of low-frequency flapping-wing aircraft imitating large birds basically adopts the gear transmission plus one-dimensional rigid wing scheme, which is still far from the flight of real large birds.

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