Achieving method for morphing aircraft wing frame based on folded paper structure

A technology of origami structure and variant aircraft, applied in the directions of wings, aircraft assembly, aircraft parts, etc., can solve problems such as failure to design, small deformation range, complex actuators, etc.

Inactive Publication Date: 2015-02-25
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the disadvantages of these designs are: 1) they can only provide relatively simple deformation modes or the deformation range is very small; 2) they are not

Method used

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  • Achieving method for morphing aircraft wing frame based on folded paper structure
  • Achieving method for morphing aircraft wing frame based on folded paper structure
  • Achieving method for morphing aircraft wing frame based on folded paper structure

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Embodiment 1

[0047] Assume that the airfoil of the wing consists of four curves, curve 1, curve 2, curve 3 and curve 4, such as Figure 4 shown. Curves 1 and 2 are arcs with a radius equal to 10, curve 3 is an arc with a radius equal to 100, and curve 4 is a straight line. Curve 1 and curve 2 are tangent at point A, curve 2 and curve 3 are tangent at point B, and curve 1 and curve 4 are tangent at point D. Points A and C constitute the leading and trailing edges of the wing respectively, curves 2 and 3 constitute the upper surface of the wing, and curves 1 and 4 constitute the lower surface of the wing.

[0048] in such as Figure 5 In the coordinate system shown, the equation of curve 1 is expressed as: (y-20) 2 +z 2 =100; the equation of curve 2 is expressed as: (y-20) 2 +z 2 =100; the equation of curve 3 is expressed as: (y-20) 2 +(z+90) 2 =10000; the equation of curve 4 is expressed as: z=-10.

[0049] Let the input for the x-z plane be V i ...

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Abstract

The invention belongs to the technical field of aircraft manufacturing and computer image processing, and relates to an achieving method for a morphing aircraft wing frame based on a folded paper structure. According to the achieving method, the three-dimensional coordinate system of the wing is determined, and the shapes of the upper surface curve and the lower surface curve of the wing are characterized by adopting the cross section curve equation; m coordinate points having the equal height are defined in the x-z plane, and the cross section curve equation performs the z-direction translation, such that the shapes of the upper surface curve and the lower surface curve of the wing and the coordinate points having the equal height are positioned in the same x-z plane; and a subsection approximation method is adopted to obtain 2N fitting coordinate points, the m*N top points of the wing frame based on the folded paper structure are obtained with the m coordinate points having the equal height and the 2N fitting coordinate points, the top points and all the adjacent points are connected through straight sections to form the folding pattern of the three-dimensional folded paper corresponding to the wing frame based on the folded paper structure, and the computer-assisted manufacture of the wing frame is further performed. According to the present invention, the good specific strength and the good energy absorption characteristic of the folded paper are utilized to design the wing frame suitable for the morphing aircraft, and the good application prospects are provided.

Description

technical field [0001] The invention relates to a method in the technical fields of aircraft manufacturing and computer image processing, in particular to a method for realizing a wing skeleton based on an origami structure that is conveniently realized in a computer program. Background technique [0002] Variant aircraft is currently a hot topic in aircraft design research, and it is also a major trend in future aircraft development. The main purpose of variant aircraft is to achieve the variant through the variable shape of the wing. Designing a variable-shape wing includes two technical difficulties, one is designing the wing skin, and the other is designing the wing skeleton. For deformable skin (morphine skin), many solutions have been proposed, including: rubber material, shape memory alloy, imitation fish scale structure, etc., which is not the focus of this patent. The shape of the inner skeleton of a traditional aircraft is fixed, which cannot meet the design requ...

Claims

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Application Information

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IPC IPC(8): B64C3/00B64F5/00B64F5/10
Inventor 周翔Y·衷汪海
Owner SHANGHAI JIAO TONG UNIV
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