Joint monomer and multi-mode soft aircraft fuselage structure

Abstract

The invention provides a joint single body and a multi-mode soft aircraft fuselage structure, and relates to the technical field of aircrafts, and the joint single body comprises a body made of a flexible material and fixing plates fixed to the two sides of the joint single body; an upper air cavity, a lower air cavity, an upper air inlet channel communicated with the upper air cavity and a lower air inlet channel communicated with the lower air cavity are formed in the body. The upper air cavity and the lower air cavity comprise a plurality of inflating channels which are arranged in parallel and are communicated with each other; the upper air cavity and the lower air cavity are formed in the body, made of the flexible material, of the joint single body, and the rigid fixing plates are arranged on the two sides of the body, so that the mode of the body can be changed by changing air pressure in the upper air cavity and the lower air cavity, rapid and frequent mode switching can be achieved, the modes of the aircraft fuselage are more diversified, and the aircraft fuselage is more convenient to use. And the trafficability of the aircraft fuselage and the adaptability to different conditions are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft, and in particular to a joint monomer and a multi-modal soft aircraft fuselage structure. Background Art

[0002] Existing unmanned aerial vehicles are widely used in disaster relief, filming and monitoring, environmental monitoring, etc. Unmanned aerial vehicles can also be used in the military field because of their remote control, high flight speed and portability. However, due to the strict requirements of the flight environment, existing aircraft are limited in complex environments such as cities.

[0003] With the development of aircraft technology, the ability of aircraft to pass through narrow terrain has been valued, so the concept of deformable aircraft has been proposed. By changing the shape of the aircraft, the projection size of the aircraft in the flight direction is changed, so that the aircraft can pass through narrow terrain. In addition to increasing the passability of the aircraft, the deformation of the aircraft can also give the aircraft more other functions, including but not limited to giving multi-functional maneuverability, providing landing and docking capabilities in complex environments, and providing lift by relying on the shape.

[0004] Among the technologies known to the inventors, there are aircraft that use SMA (shape memory alloy) to achieve deformation. This is mainly achieved by inserting shape memory alloy wires vertically and horizontally in the soft skin, controlling the length of the alloy wires by external current, achieving deformation of the alloy wires, driving the deformation of the wings, and finally achieving deformation of the aircraft. However, the shape of the shape memory alloy wire is determined by temperature, and the shape of the alloy wire is controlled by current, and the heat dissipation problem cannot be well solved. Therefore, the return time of the aircraft deformation achieved by the shape memory alloy wire is too long, and it cannot be deformed frequently and quickly.

[0005] Therefore, it is necessary to develop a new type of aircraft structure to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a joint monomer and a multi-modal soft aircraft fuselage structure to solve the problems existing in the prior art. By arranging an upper air cavity and a lower air cavity in a body made of a flexible material of the joint monomer, and arranging rigid fixing plates on both sides of the body, the mode of the body can be changed by changing the air pressure in the upper air cavity and the lower air cavity, and rapid and frequent mode switching can be achieved, thereby making the mode of the aircraft fuselage more diverse, improving the passability of the aircraft fuselage and the adaptability to different conditions.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] A joint monomer is used in an aircraft, comprising a main body made of a flexible material and fixing plates fixed on both sides of the joint monomer, wherein an upper air cavity, a lower air cavity, an upper air inlet duct connected to the upper air cavity and a lower air inlet duct connected to the lower air cavity are arranged inside the main body; the upper air cavity and the lower air cavity include a plurality of inflation ducts arranged in parallel, and the plurality of inflation ducts are connected.

[0009] As an implementation manner, the plurality of inflatable channels are arranged perpendicular to the forward direction of the aircraft, and each of the inflatable channels is distributed along the forward direction of the aircraft.

[0010] As an implementation manner, the upper air inlet duct in the upper air cavity and the lower air inlet duct in the lower air cavity are arranged in a one-to-one correspondence.

[0011] As an implementation manner, the body is made of silicone material.

[0012] As an embodiment, a skin is applied on the surface of the main body.

[0013] The present invention also provides a multimodal soft aircraft fuselage structure, comprising at least one of the above-mentioned joint monomers. When more than one joint monomer is provided, adjacent joint monomers are connected via the fixing plate. When three or more joint monomers are provided, an upper inner joint monomer air inlet and a lower inner joint monomer air inlet are further provided on the body of the joint monomer located on the outside and are used to communicate with the upper air cavity and the lower air cavity in the inner joint monomer.

[0014] As an implementation manner, the air inlets of the upper air inlet duct, the lower air inlet duct, the upper inner joint monomer air inlet duct and the lower inner joint monomer air inlet duct are all arranged on the fixing plate.

[0015] As an implementation manner, the joint monomers are provided in three numbers, namely a left joint monomer, a middle joint monomer and a right joint monomer.

[0016] As one embodiment, the main body of the left joint monomer is provided with an upper air inlet of the left joint, a lower air inlet of the left joint, an upper air inlet of the middle joint and a lower air inlet of the middle joint.

[0017] As one embodiment, the upper air inlet of the left joint and the lower air inlet of the left joint are both arranged in the middle part of the main body of the left joint monomer, and the upper air inlet of the middle joint and the lower air inlet of the middle joint are respectively arranged in the main body of the left joint monomer near the two ends.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] The present invention arranges an upper air cavity and a lower air cavity in a body made of a flexible material of a joint monomer, and arranges rigid fixing plates on both sides of the body, so that the mode of the body can be changed by changing the air pressure in the upper air cavity and the lower air cavity; after the aircraft fuselage applies multiple joint monomers, the mode of the aircraft fuselage can be changed by controlling the modes of the multiple joint monomers, so that the mode of the aircraft fuselage is more diverse, which can improve the passability of the aircraft fuselage and the adaptability to different conditions.

[0020] The present invention can quickly adjust the aircraft fuselage mode by inflating and deflating the upper air cavity and the lower air cavity. The time required for the air pressure change is much shorter than the heat dissipation time of the shape memory alloy wire, and fast and frequent mode switching can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a structural schematic diagram of a fuselage structure of a multi-modal soft aircraft in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the middle left joint monomer;

[0024] Figure 3 for Figure 1 Another cross-sectional structural diagram of the middle left joint monomer;

[0025] Figure 4 A schematic diagram of a mode of a multi-modal soft aircraft fuselage structure in one embodiment of the present invention;

[0026] Figure 5 Another mode schematic diagram of the fuselage structure of a multi-mode soft aircraft in one embodiment of the present invention;

[0027] Figure 6 Another mode schematic diagram of the fuselage structure of a multi-mode soft aircraft in one embodiment of the present invention;

[0028] Figure 7 Another modal schematic diagram of the fuselage structure of a multi-modal soft aircraft in one embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. Left joint unit; 11. Upper air inlet of left joint; 12. Lower air inlet of left joint; 13. Upper air inlet of middle joint; 14. Lower air inlet of middle joint; 2. Middle joint unit; 3. Right joint unit; 4. Fixing plate; 5. Upper air cavity; 6. Lower air cavity; 7. Inflation channel; 8. Fixing plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide a joint monomer and a multi-modal soft aircraft fuselage structure to solve the problems existing in the prior art. By arranging an upper air cavity and a lower air cavity in a body made of a flexible material of the joint monomer, and arranging rigid fixing plates on both sides of the body, the mode of the body can be changed by changing the air pressure in the upper air cavity and the lower air cavity, and rapid and frequent mode switching can be achieved, thereby making the mode of the aircraft fuselage more diverse, and improving the passability of the aircraft fuselage and its adaptability to different conditions.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Embodiment 1:

[0035] like Figure 1 to Figure 7 As shown, this embodiment provides a joint monomer used in an aircraft, the joint monomer includes a body 8 made of a flexible material and a fixing plate 4 fixed on both sides (in the width direction) of the body 8, and the fixing plate 4 has a certain rigidity. The body 8 is provided with an upper air cavity 5, a lower air cavity 6, an upper air inlet duct connected to the upper air cavity 5, and a lower air inlet duct connected to the lower air cavity 6; the upper air cavity 5 and the lower air cavity 6 include a plurality of inflation ducts 7 arranged in parallel, and the plurality of inflation ducts 7 are connected.

[0036] When in use, the air inflatable passages 7 in the upper air chamber 5 and the lower air chamber 6 are inflated. When the air pressure in the upper air chamber 5 and the lower air chamber 6 is equal and maintained at a set pressure value, the joint monomer can maintain the wing airfoil shape; when the pressure in the upper air chamber 5 increases and the pressure in the lower air chamber 6 decreases, the upper air chamber 5 expands and the lower air chamber 6 contracts. Since the body 8 is made of a flexible material, at this time, the body 8 bends downward (the fixing plates 4 on both sides of the body 8 can prevent the front and rear ends of the body 8 from bending downward or upward); when the pressure in the upper air chamber 5 decreases and the pressure in the lower air chamber 6 increases, the upper air chamber 5 contracts, the lower air chamber 6 expands, and the body 8 bends upward. If other joint monomers are connected to the side of the joint monomer to form an aircraft fuselage structure, and then by changing the air pressure of the upper air chamber 5 and the lower air chamber 6 in each joint monomer, the change of multiple modes of the aircraft fuselage structure can be achieved, and the passability of the aircraft fuselage and the adaptability to different conditions can be improved.

[0037] Therefore, this embodiment sets an upper air cavity 5 and a lower air cavity 6 in the body 8 made of the flexible material of the joint monomer, and sets a rigid fixing plate 4 on both sides of the body 8, so that the mode of the body 8 can be changed by changing the air pressure in the upper air cavity 5 and the lower air cavity 6; after the aircraft fuselage uses multiple joint monomers, the mode of the aircraft fuselage can be changed by controlling the mode of multiple joint monomers, so that the mode of the aircraft fuselage is more diverse, and the passability of the aircraft fuselage and the adaptability to different conditions can be improved. Moreover, the method of changing the mode of the aircraft fuselage in this embodiment is relative to the method of changing the shape of the aircraft wing using the shape of the memory alloy in the prior art. In this embodiment, the mode of the aircraft fuselage can be quickly adjusted by filling and discharging the upper air cavity 5 and the lower air cavity 6, and the time required for the air pressure change is much shorter than the heat dissipation time of the shape memory alloy wire, which can achieve fast and frequent mode switching.

[0038] In this embodiment, a plurality of inflatable channels 7 are arranged at intervals along the width direction, and each inflatable channel 7 is distributed in the forward direction of the aircraft. The upper inlet channel in the upper air cavity 5 and the lower inlet channel in the lower air cavity 6 are arranged one by one in the upper and lower directions.

[0039] In this embodiment, the body 8 is made of silicone material, and a skin is applied on the surface of the silicone.

[0040] Embodiment 2:

[0041] This embodiment provides a multi-modal soft aircraft fuselage structure, including at least one joint monomer in Embodiment 1, so as to meet the purpose that the aircraft fuselage structure can realize multiple modal changes, improve its passability and adaptability to different conditions. When there are more than one joint monomer in the aircraft fuselage structure, adjacent joint monomers are connected by a fixing plate 4, and at this time, two adjacent joint monomers share a fixing plate 4; when there are three or more joint monomers, in the joint monomer located on the outside, the body 8 is also provided with an upper inner joint monomer air inlet and a lower inner joint monomer air inlet for communicating with the upper air cavity 5 and the lower air cavity 6 in the inner joint monomer. The air inlets of the upper air inlet, the lower air inlet, the upper inner joint monomer air inlet and the lower inner joint monomer air inlet are all arranged on the fixing plate 4.

[0042] The device for changing the air pressure in the upper air cavity 5 and the lower air cavity 6 can be an air pump or a high-pressure air tank, and needs to be matched with components such as a pressure sensor and an automatic valve to detect the air pressure in the upper air cavity 5 and the lower air cavity 6 and control the stop of the inflation process. This embodiment focuses on explaining the structural form of the aircraft fuselage structure, and the person skilled in the art can set the device for changing the air pressure by himself.

[0043] There are three joint monomers in the aircraft fuselage structure of the present embodiment, namely, a left joint monomer 1, a middle joint monomer 2 and a right joint monomer 3. The main body 8 in the left joint monomer 1 is provided with a left joint upper air inlet 11, a left joint lower air inlet 12, a middle joint upper air inlet 13 and a middle joint lower air inlet 14. The main body 8 in the right joint monomer 3 only needs to be provided with a right joint upper air inlet and a right joint lower air inlet. The left joint upper air inlet 11 and the left joint lower air inlet 12 are both arranged in the middle part of the main body 8 in the left joint monomer 1, and the middle joint upper air inlet 13 and the middle joint lower air inlet 14 are respectively arranged in the main body 8 in the left joint monomer 1 at positions close to both ends.

[0044] When the pressures in the upper air chamber 5 and the lower air chamber 6 of the body 8 of the three joint monomers are equal, the aircraft fuselage can maintain Figure 4 When the pressure in the upper air cavity 5 of the body 8 of the three joint monomers is high and the pressure in the lower air cavity 6 is low, the aircraft fuselage can maintain Figure 5 In the above two modes, the lateral width of the aircraft fuselage structure is reduced, which is convenient for passing through narrow passages and improving the passability of the aircraft. When the pressure in the upper air cavity 5 of the body 8 of the middle joint monomer 2 is high and the pressure in the lower air cavity 6 is low, and the pressure in the upper air cavity 5 of the body 8 of the left joint monomer 1 and the right joint monomer 3 is low and the pressure in the lower air cavity 6 is high, the aircraft fuselage can maintain Figure 6 The modality in .

[0045] When five joint monomers are arranged in the aircraft fuselage structure, the upper air cavity 5 of the main body 8 of the three middle joint monomers has a high pressure, and the lower air cavity 6 has a low pressure, and the upper air cavity 5 of the main body 8 of the two side end joint monomers has a low pressure, and the lower air cavity 6 has a high pressure, the aircraft fuselage can maintain Figure 7 The mode in is used when the aircraft is in low energy or other conditions where it does not need to fly, so that it can be mounted on a tree branch or pipe and wait for the next takeoff or be directly recovered.

[0046] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A joint monomer, used in an aircraft, characterized in that: It includes a main body made of flexible material and fixing plates fixed on both sides of the joint monomer, wherein an upper air cavity, a lower air cavity, an upper air inlet duct connected to the upper air cavity, and a lower air inlet duct connected to the lower air cavity are arranged inside the main body; the upper air cavity and the lower air cavity include multiple inflation ducts arranged in parallel, and the multiple inflation ducts are connected.

2. The joint monomer according to claim 1, characterized in that: The plurality of inflatable channels are arranged perpendicular to the forward direction of the aircraft, and each of the inflatable channels is distributed along the forward direction of the aircraft.

3. The joint monomer according to claim 2, characterized in that: The upper air inlet passage in the upper air cavity and the lower air inlet passage in the lower air cavity are arranged one by one in upper and lower correspondence.

4. The joint monomer according to claim 3, characterized in that: The body is made of silicone material.

5. The joint monomer according to claim 4, characterized in that: The surface of the body is provided with a skin.

6. A multi-modal soft aircraft fuselage structure, characterized in that: It comprises at least one joint monomer as described in any one of claims 1 to 5, when more than one joint monomer is provided, adjacent joint monomers are connected by the fixing plate, and when three or more joint monomers are provided, in the joint monomers located on the outside, an upper inner joint monomer air inlet duct and a lower inner joint monomer air inlet duct for communicating with the upper air cavity and the lower air cavity in the inner joint monomer are also provided on the main body.

7. The multi-modal soft aircraft fuselage structure according to claim 6, characterized in that: The air inlets of the upper air inlet duct, the lower air inlet duct, the upper inner joint monomer air inlet duct and the lower inner joint monomer air inlet duct are all arranged on the fixing plate.

8. The multi-modal soft aircraft fuselage structure according to claim 6, characterized in that: There are three joint monomers, namely a left joint monomer, a middle joint monomer and a right joint monomer.

9. The multi-modal soft aircraft fuselage structure according to claim 8, characterized in that: The main body of the left joint monomer is provided with an upper air inlet of the left joint, a lower air inlet of the left joint, an upper air inlet of the middle joint and a lower air inlet of the middle joint.

10. The multi-modal soft aircraft fuselage structure according to claim 9, characterized in that: The upper air inlet of the left joint and the lower air inlet of the left joint are both arranged in the middle of the main body of the left joint monomer, and the upper air inlet of the middle joint and the lower air inlet of the middle joint are respectively arranged in the main body of the left joint monomer near the two ends.

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