Mechanism capable of achieving passive folding and twisting of wing

A wing and aileron technology, applied in the field of passive folding and twisting of the wing, can solve the problems of increasing the complexity of the flapping wing mechanism and control system, reducing the energy efficiency of the aircraft, etc., achieving easy replacement, enhanced flexibility, Smooth flight effect

Active Publication Date: 2019-05-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor believes that in the existing design of flapping-wing aircraft, the folding and torsion movements of the wings mostly use active drive methods, which not only increases the complexity of the flapping-wing mechanism and control system, but also reduces the energy efficiency of the aircraft

Method used

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  • Mechanism capable of achieving passive folding and twisting of wing
  • Mechanism capable of achieving passive folding and twisting of wing
  • Mechanism capable of achieving passive folding and twisting of wing

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Embodiment 1

[0037] This embodiment discloses an elastic passive foldable torsion wing, which can realize three-degree-of-freedom (flapping-folding-twisting) movement based on a single driving source. The elastic passive folding torsion wing is composed of a main wing and an aileron. The main wing part is equivalent to the big arm of a bird and plays the role of beating up and down, while the aileron part is elastically connected by a spring. During the flapping process of the wing, due to the setting of the elastic connection, under the action of elastic force and air resistance, as the main wing flaps upward, the aileron makes a large downward flapping movement relative to the main wing, and this movement will lag behind the main wing During the wing-down process, the aileron also makes a small upward flapping movement relative to the main wing under the action of elastic force and air resistance due to the setting of the elastic connection while the main wing is flapping down. And this ...

Embodiment 2

[0058] Embodiment 2 discloses the manufacturing method of the elastic passive folding torsion wing described in Embodiment 1, taking the refitting of an existing flapping wing aircraft as an example:

[0059] -Remove the original wing, install the spar bushing 1 at the spar, insert the end of the spar bushing 1 into the main wing bar 2, insert the end of the main wing bar 2 into the bearing, and match the outer ring of the bearing with the bearing of the sleeve bracket 3 The holes 3-6 are placed concentrically, and the end of the main wing bar 2 is aligned with the inner surface of the sleeve bracket 3 . The installation of the spar casing 1 and the main spar 2 is completed.

[0060] -Insert one end of the spring into the spring placement rod 8-3 of the second sleeve 8, and insert the other end into the fixing rod 4 through the fan-shaped groove 8-2. The fixed rod 4 is socketed in the fixed rod bracket 3-1, since the fixed rod 4 is only affected by the elastic force, it is on...

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PUM

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Abstract

The invention discloses an elastic passive folding and twisting wing. The elastic passive folding and twisting wing comprises a main wing and an aileron, wherein the aileron is elastically connected with the main wing, and the flapping motion lags behind the flapping motion of the main wing during movement; during the flapping movement, the main wing and the aileron are deformed to change the angle of attack of the wing, thereby achieving passive twisting of the wing in the flapping process. By controlling 'flapping' of a single degree of freedom, during the premise of not adding the complexity of a mechanical mechanism and control system, the synergetic movement of 'flapping-folding-twisting' is achieved, the aerodynamic efficiency is effectively improved, and an aircraft is closer to real bird flying in the bionics.

Description

technical field [0001] The invention belongs to the field of flight machinery, and in particular relates to a mechanism capable of realizing passive folding and twisting of wings. Background technique [0002] The design of the flapping-wing aircraft is inspired by the excellent flight characteristics of birds in nature. Compared with traditional fixed-wing aircraft and rotary-wing aircraft, the flapping-wing aircraft has the unique advantages of maneuverability, low energy consumption and good stealth performance. [0003] Relevant literature points out that torsion is an angular movement around the centerline of the wing, which can tilt the wing to change its angle of attack; folding is the stretching and bending of the wing along the span direction, which can fold the wing to reduce the air resistance when flapping up. Folding and twisting movements play an important role in small and medium-sized flying birds, in which the lift and thrust required for bird flight are mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C33/02B64C1/30
CPCB64C33/02
Inventor 姬冰杨帆朱乔粼
Owner SHANDONG UNIV
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