Wing with fishbone-shaped flexible structure

Abstract

The invention discloses a fishbone type flexible wing structure. The fishbone type flexible wing structure comprises a high-elasticity outer skin, a fishbone structure, a skin supporting structure and a deformation driving mechanism. The fishbone structure is made of an elastic material and is connected with the deformation driving mechanism through ribs; the skin supporting structure is formed by folding and sticking a plurality of layers of plates; and the upper surface of the skin supporting structure is tightly bonded with the high-elasticity skin. The skin supporting structure and the fishbone-shaped wing structure are tightly bonded together. The flexible deformation wing skin has the advantages of light weight, low cost, good mechanical property, high plasticity, capability of meeting the mechanical requirements of the flexible deformation wing skin and the like.

Description

Technical Field

[0001] The present invention relates to a wing with a fishbone-shaped flexible structure. Background Art

[0002] The technology of variable wing can improve the aerodynamic performance of an aircraft, expand the flight envelope and enhance the flight ability. Wing camber change is an effective method to change the aerodynamic force and moment generated by the wing. The wing structure design with a smooth surface and continuous wing structure change, which is different from the traditional discrete aerodynamic surface design, has more advantages in aerodynamic control and is a hot spot in the current wing structure design. Therefore, some researchers have proposed a fishbone structure flexible wing. The fishbone wing structure is inspired by fish in nature and is essentially a complex flexible mechanism. It can achieve a large continuous change in the chord line of the wing section. Only a very small driving energy can achieve a satisfactory deformation effect. The framework is a long beam and a series of spokes connected to the beam, and the outside of the structure is a layer of skin prototype. The drive of the fishbone active camber structure is also similar to the muscle system in nature. The actuator outputs torque to the main beam through a steel cable.

[0003] The fishbone structure has a simple design, greatly reduces the structural weight and improves the structural reliability; the surface of the fishbone structure wing has no gaps compared with the traditional wing, greatly improving the flight performance and reducing the noise. The fishbone structure wing is a very excellent wing structure solution, but the fishbone structure puts forward new requirements for the skin. On the one hand, the skin is required to be able to withstand aerodynamic loads and have good skin bearing capacity. On the other hand, the skin is required to keep the wing surface flat when the fishbone structure undergoes large deformation, which requires it to have good deformation ability. The traditional skin support scheme does not have the ability of large deformation, while the high-elastic material skin cannot withstand aerodynamic loads. At present, the flexible skin structures studied in the industry are mainly deformable skin support structures covered with high-elastic thin films, such as honeycomb flexible skin and corrugated plate flexible skin. The disadvantage of these structures is that although they can meet the skin requirements of large deformation and high bearing capacity, the in-plane stiffness is relatively large, which will significantly change the deformation form and deformation ability of the fishbone-shaped flexible wing and increase the design difficulty.

[0004] Therefore, it is hoped that there is a technical solution to overcome the above problems of the fishbone-shaped flexible wing structure. Summary of the Invention

[0005] In order to achieve the above object, the present invention provides a wing with a fishbone-shaped flexible structure.

[0006] A wing with a fishbone - type flexible structure according to the present invention includes: a highly elastic outer skin, a wing fishbone structure, a skin support structure, and a deformation driving mechanism. The skin support structure is a corrugated paper structure formed by folding and pasting multiple layers of paper. The fishbone structure is made of an elastic material and includes a main beam and a series of spokes connected to the beam. The deformation driving mechanism includes a driving motor and ribs. The driving motor transmits torque to the main beam structure through the ribs, thereby realizing the driving of the fishbone active bending structure. The contour formed by one side of the structural wave crest is the initial airfoil of the deformed wing. One side of the wave crest of the skin support structure is tightly bonded to the highly elastic skin. The valley side and the side of the skin support structure are tightly bonded to the fishbone - type wing structure.

[0007] There is a first structural adhesive for pasting between the highly elastic outer skin and the fishbone - type wing structure.

[0008] There is a second structural adhesive for pasting between the fishbone wing structure and the skin support structure.

[0009] There is a third structural adhesive for pasting between the highly elastic outer skin and the skin support structure.

[0010] Preferably, the skin support structure is made of corrugated paper.

[0011] Preferably, the highly elastic skin is made of rubber.

[0012] Preferably, the skin support structure of the fishbone - type flexible wing is used for an aircraft.

[0013] According to one aspect of the present invention, there is provided a wing with a fishbone - type flexible structure, characterized in that it includes:

[0014] a skin support structure, an elastic skin, a wing fishbone structure, a deformation driving motor, and ribs,

[0015] wherein:

[0016] There is a gap between the wing fishbone structure and the elastic skin,

[0017] The skin support structure is installed in the gap,

[0018] The wing fishbone structure is made of an elastic material and includes a main beam and a plurality of spokes connected to the main beam,

[0019] The deformation driving motor is connected to the main beam in the wing fishbone structure through the ribs,

[0020] The deformation driving motor transmits torque to the wing fishbone structure through the ribs, thereby realizing the driving of the wing fishbone structure,

[0021] The skin support structure has a corrugated paper structure and can bear loads in the direction of skin loading, thus meeting the requirements for an elastic skin to bear aerodynamic loads and ensuring that the skin does not have dents or bulges.

[0022] The skin support structure has a deformation ability perpendicular to the skin loading direction, meeting the requirements for large deformations of the skin of a fishbone wing and achieving uniform deformation, thus ensuring that the skin does not have wrinkles.

[0023] The advantages of the present invention include that the skin support structure of the wing with a fishbone flexible structure can bear certain tensile and compressive loads in the vertical direction of the corrugated structure and can undergo large deformations in the horizontal direction of the corrugated structure.

[0024] The advantages of the present invention also include that, on the premise of fully meeting the mechanical requirements of the skin of a deformable wing, the skin support structure achieves the following beneficial effects:

[0025] 1. Using corrugated paper as the material of the skin support structure, the support structure is lightweight. The support structure will not significantly increase the total mass of the wing and has a low cost;

[0026] 2. The skin support structure has strong plasticity and can be applied to fishbone flexible wings of different sizes by adjusting the paper thickness, the number of layers of the structure, and the height of the corrugations.

[0027] 3. The structure design of the skin support structure is simple and convenient for processing. The highly elastic skin does not require pre-tightening, has small internal forces in the structure, and is safe and reliable.

[0028] 4. The skin support structure has a low stiffness in the horizontal direction of the corrugations, so it will not significantly affect the deformation performance of the fishbone flexible wing. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of a skin support structure of a deformable wing according to the first embodiment of the present invention.

[0030] Figure 2 is a partial schematic structural diagram according to an embodiment of the present invention.

[0031] Description of the Reference Numerals:

[0032] 101 is the skin support structure, 102 is the highly elastic skin, 103 is the wing fishbone structure, 104 is the gap existing between the wing fishbone structure and the highly elastic skin, 105 is the deformation drive motor, and 106 is the rib. Detailed Embodiments

[0033] The embodiments of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The described embodiments are some, but not all, embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention. The embodiments of the present invention will be described in detail below with reference to the drawings.

[0034] As Figure 1 shown, the wing with a fishbone-shaped flexible structure according to an embodiment of the present invention includes: a skin support structure 101, a highly elastic skin 102, a wing fishbone structure 103, a deformation drive motor 105, and ribs 106. The highly elastic skin 102 is made of rubber and glued to the fishbone-shaped flexible wing structure 103. There is a large gap 104 between the fishbone-shaped flexible wing structure 103 and the highly elastic skin 102. The skin support structure 101 is installed in the gap 104. The deformation drive motor 105 is connected to the main beam in the fishbone-shaped flexible structure 103 through the ribs 106.

[0035] As Figure 2 shown, the skin support structure labeled 101 is combined with the skin 102 through an adhesive layer and the wing fishbone structure 103. In a specific example, the skin support structure 101 is made of corrugated paper, and the corrugated paper is formed into a corrugated paper structure through gluing and folding.

[0036] According to an embodiment of the present invention, in the wing with a fishbone-shaped flexible structure, the wing fishbone structure 103 is made of an elastic material and consists of a main beam and a series of spokes connected to the beam. The deformation drive motor 105 transmits torque to the wing fishbone structure 103 through the ribs 106, thereby realizing the drive of the fishbone active bending structure. The skin support structure 101 is a corrugated paper structure, which can bear a certain load in the skin loading direction, meeting the requirements for the skin of the fishbone wing to bear aerodynamic loads, and can ensure that the skin does not sag or bulge. The skin support structure 101 has a strong deformation ability in the direction perpendicular to the skin loading direction, meeting the requirements for large deformation of the skin of the fishbone wing, and the deformation form is uniformly changed, so that the skin can be ensured not to wrinkle. The skin support structure 101 has a sufficiently small mass and in-plane stiffness, so it will not affect the deformation process of the flexible skin of the deformable wing.

Claims

1. An aircraft wing with a fishbone-shaped flexible structure, characterized in that Comprising: A skin support structure (101), an elastic skin (102), a wing fishbone structure (103), a deformation drive motor (105) and ribs (106), Wherein: There is a gap (104) between the wing fishbone structure (103) and the elastic skin (102), The skin support structure (101) is installed in the gap (104), The wing fishbone structure (103) is made of an elastic material and includes a main beam and a plurality of spokes connected to the main beam, The deformation drive motor (105) is connected to the main beam in the wing fishbone structure (103) through the ribs (106), The deformation drive motor (105) transmits torque to the wing fishbone structure (103) through the ribs (106), thereby realizing the drive of the wing fishbone structure (103), The skin support structure (101) is made of single-layer corrugated paper, which bears loads in the skin loading direction, thereby meeting the requirements for the elastic skin (102) to bear aerodynamic loads to ensure that the skin does not sag or bulge, The skin support structure (101) has deformation ability in the direction perpendicular to the skin loading direction, meeting the requirements for large deformation of the fishbone wing skin and realizing uniform deformation, thereby ensuring that the skin does not wrinkle.

2. The wing with a fishbone-shaped flexible structure according to claim 1, characterized in that: The elastic skin (102) is made of rubber, The elastic skin (102) and the wing fishbone structure (103) are glued together.

3. The wing with a fishbone-shaped flexible structure according to claim 1, characterized in that: The skin support structure (101) has a sufficiently small mass and in-plane stiffness, so as not to affect the deformation process of the flexible skin of the deformable wing.

4. The wing with a fishbone-shaped flexible structure according to claim 1, characterized in that: The skin support structure (101) is combined with the wing fishbone structure (103) and the elastic skin (102) through an adhesive layer.

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