Flapping-wing flapping angle changing mechanism

A technology for changing angles and angles, which is applied in the field of flapping-wing aircraft variable flapping angle mechanisms, can solve the problems of heavy structural weight, low transmission efficiency, and short product life, and achieve the effects of reducing weight, improving reliability, and being easy to process

Active Publication Date: 2017-02-08
BEIHANG UNIV
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  • Abstract
  • Description
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Problems solved by technology

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  • Flapping-wing flapping angle changing mechanism
  • Flapping-wing flapping angle changing mechanism
  • Flapping-wing flapping angle changing mechanism

Examples

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[0036] Example

[0037] This example shows a flapping-wing variable flapping angle mechanism. The front and rear substrates are 125mm high, 100mm wide, and the connecting rod diameter of the fuselage is 5mm. The motor is a Langyu 2204 brushless motor. All gears have a modulus of 1, and the number of motor gears is 10. The number of teeth of the large and small gears on the intermediate gear are 42 and 15, respectively. The number of teeth of the drive gear is 55. The flapping wing rod is 55mm long, the flapping wing swing arm length is 65mm, the flapping wing spar is 300mm long, and the rotating base is 55mm long. The middle positioning rod is located The position of the rotating base is 40mm from the bottom installation position, the steering gear rod length is 30mm, the steering gear rocker arm length is 25mm, the steering gear model is EMAX-ES08MA, the inner diameter of the auxiliary positioning washer is 4mm, the outer diameter is 9mm, and the fixed pin diameter is 1mm.

[0...

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Abstract

The invention discloses a flapping-wing flapping angle changing mechanism, relating to the field of aircraft design. The flapping-wing flapping angle changing mechanism is composed of a flapping wing system and an angle changing system, wherein the flapping wing system is used for generating upward and downward flapping motions of the flapping wings, and the angle changing system is used for changing the flapping angles of the left and right flapping wings. The included angles between the flapping equilibrium positions of the left and right flapping wings and the horizontal surface are simultaneously changed to change the lifting force magnitude and direction of the left and right wing surfaces, thereby generating a lifting force difference and further generating a rolling motion of the mechanism. The flapping-wing flapping angle changing mechanism is applicable to both flexible flapping wings and rigid flapping wings, has the advantages of high reliability, high efficiency and long service life, and does not have sliding friction connection. The lightening hole is reasonably designed, so that the flapping-wing flapping angle changing mechanism has the characteristics of compact and simple structure and light structural weight, and is easy for processing.

Description

technical field [0001] The invention relates to the field of aircraft design, in particular to a mechanism for changing the flapping angle of a flapping-wing aircraft. Background technique [0002] At present, unmanned aerial vehicle systems are playing an increasingly important role in both civilian and military fields. Common UAVs can be classified according to flight principles: fixed-wing UAVs, rotary-wing UAVs, and flapping-wing UAVs. With the development of low Reynolds number aerodynamics research, the advantages of the flapping-wing flight method in terms of aerodynamic efficiency and wind resistance at a micro-scale have attracted the attention of researchers, and micro-flapping-wing aircraft have gradually developed. However, the control method of flapping wings has always been a difficult point. Because the wings are very light and thin, it is difficult to arrange control surfaces such as ailerons, so most flapping wings do not have roll control. When the flying...

Claims

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Application Information

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IPC IPC(8): B64C33/02
CPCB64C33/02
Inventor 向锦武李道春姜家琦
Owner BEIHANG UNIV
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