Wide-temperature-range radar / infrared multi-band stealth unmanned aerial vehicle front edge component

Abstract

The wide-temperature-range radar / infrared multi-band stealth unmanned aerial vehicle front edge component comprises a front edge body made of a carbon fiber reinforced carbon-based composite material layer, an aerogel coating is arranged on the outer wall of the front edge body, an inner side skin is arranged on the outer wall of the aerogel coating, and a honeycomb sandwich structure layer is arranged on the outer wall of the inner side skin. A frequency selective surface layer is arranged on the outer wall of the honeycomb sandwich structure layer, an outer side skin is arranged on the outer wall of the frequency selective surface layer, and an infrared coating is arranged on the outer wall of the outer side skin. The front edge component of the unmanned aerial vehicle is simple, practical and high in structure designability, the surface temperature of the front edge component of the unmanned aerial vehicle can be remarkably reduced through the aerogel coating and the infrared coating, and the infrared stealth function is achieved; the unique periodic structure unit of the frequency selective surface can realize resonance absorption of electromagnetic waves, so that wave absorption is realized, an electromagnetic wave stealth function is obtained, radar and infrared multi-band stealth is realized, and the frequency selective surface can be applied under actual complex working conditions.

Description

Technical Field

[0001] The present application relates to the field of UAV leading edge technology, and in particular to a wide-temperature radar / infrared multi-band stealth UAV leading edge component. Background Art

[0002] The leading edge of a drone is the part of the wing or rotor blade that first contacts the airflow. It guides the airflow and plays a key role in lift generation and drag control. Whether for fixed-wing or multi-rotor drones, this crucial role not only impacts the aerodynamic performance of the aircraft but also directly affects the efficiency, stability, and safety of the entire system.

[0003] The key role of drone leading edge components is to significantly reduce drag during flight through optimized design, while increasing lift and thus improving overall flight efficiency. Advanced materials and technologies are used to ensure optimal flight even in adverse conditions. Furthermore, a suitable leading edge shape helps improve the drone's responsiveness and stability, making operation more flexible and accurate. Especially in consumer products, measures to mitigate damage caused by collisions are essential, such as using soft materials as protective layers.

[0004] In recent years, with advances in aviation technology, research on UAV leading edges has made significant progress. For example, carbon fiber composites, due to their superior strength-to-weight ratio and stiffness, are widely used to manufacture lightweight, durable leading edge components. However, the increasingly harsh operational environments of UAVs are placing higher demands on the radar and infrared stealth performance of UAV leading edge components. Existing structures struggle to achieve both mechanical performance and radar and infrared multi-band stealth characteristics. Consequently, higher demands are being placed on the structural design of UAV leading edge components. Utility Model Content

[0005] The purpose of the utility model is to provide a wide temperature range radar / infrared multi-band stealth UAV leading edge component to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An embodiment of the present application discloses a leading edge component of a wide-temperature radar / infrared multi-band stealth drone, which is characterized in that it includes a leading edge body made of a carbon fiber reinforced carbon-based composite material layer, the outer wall of the leading edge body is provided with an aerogel coating, the outer wall of the aerogel coating is provided with an inner skin, the outer wall of the inner skin is provided with a honeycomb sandwich structure layer, the outer wall of the honeycomb sandwich structure layer is provided with a frequency selective surface layer, the outer wall of the frequency selective surface layer is provided with an outer skin, and the outer wall of the outer skin is provided with an infrared coating.

[0008] Furthermore, the wide temperature range radar / infrared multi-band stealth UAV leading edge component is characterized in that: the aerogel coating thickness is 2-4 microns, the inner skin thickness is 1-2 centimeters, the honeycomb sandwich structure layer thickness is 2-4 centimeters, the frequency selective surface layer thickness is 0.5-1 centimeter, the outer skin thickness is 1-2 centimeters, and the infrared coating thickness is 1-2 microns.

[0009] Furthermore, the wide temperature range radar / infrared multi-band stealth UAV leading edge component is characterized in that the frequency selective surface layer is prepared by a metal unit through a laser engraving process, the side length of the periodic unit is 4-5 cm, and the metal unit is circular with a diameter of 3-4 cm.

[0010] Compared with the existing technology, the advantages of the present invention are: the leading edge component structure of the wide temperature range radar / infrared multi-band stealth UAV is highly designable, the aerogel coating and infrared coating can significantly reduce the surface temperature of the leading edge component of the UAV, realizing the infrared stealth function; the unique periodic structure unit of the frequency selective surface can achieve resonant absorption of electromagnetic waves, thereby achieving wave absorption and obtaining electromagnetic wave stealth function. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 Shown is a structural schematic diagram of the leading edge components of a wide temperature range radar / infrared multi-band stealth UAV in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0013] The following is a detailed description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0014] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0016] Ginseng Figure 1 As shown, a wide temperature range radar / infrared multi-band stealth UAV leading edge component is characterized in that it includes a leading edge body 10 made of a carbon fiber reinforced carbon-based composite material layer, and the carbon fiber reinforced carbon-based composite material layer is made by repeating a vacuum-assisted precursor impregnation pyrolysis process 9 times, wherein the carbon fiber is woven into a preform by a 2.5D process, and the precursor is a high-carbon yield phenolic resin.

[0017] The outer wall of the leading edge body 10 is provided with an aerogel coating 20 . The aerogel coating 20 has a thickness of 3 microns and is made of nano-silicon dioxide particles. The diameter of the nano-silicon dioxide particles is 20 nanometers.

[0018] An inner skin 30 is provided on the outer wall of the aerogel coating 20. The inner skin 30 has a thickness of 1.5 cm and is made of a glass fiber reinforced resin matrix composite material layer. The glass fiber reinforced resin matrix composite material layer is made by a vacuum assisted resin transfer molding process.

[0019] A honeycomb sandwich structure layer 40 is provided on the outer wall of the inner skin 30. The honeycomb sandwich structure layer 40 has a thickness of 3 cm and is made of aluminum alloy.

[0020] The outer wall of the honeycomb sandwich structure layer 40 is provided with a frequency selective surface layer 50 . The frequency selective surface layer 50 is 0.8 cm thick and is prepared by a metal unit through a laser engraving process. The side length of the periodic unit is 4.5 cm. The metal unit is circular with a diameter of 3.5 cm.

[0021] An outer skin 60 is provided on the outer wall of the frequency selective surface layer 50 . The outer skin 60 has a thickness of 1.5 cm and is made of a carbon fiber reinforced resin matrix composite material layer produced by a vacuum assisted resin transfer molding process.

[0022] An infrared coating 70 is provided on the outer wall of the outer skin 60 . The infrared coating 70 is made of nano-carbon particles, and the diameter of the nano-silicon dioxide particles is 10 nanometers.

[0023] The leading edge components of the drone can minimize the surface temperature, with an infrared emissivity as low as 0.15, absorb surface electromagnetic waves to the maximum extent, and the minimum reflection loss can be as low as negative 40dB, achieving radar and infrared multi-band stealth.

[0024] The above is only one specific embodiment of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial modification of the present invention using this concept shall be deemed an infringement of the scope of protection of the present invention. However, any simple modification, equivalent change, and modification of the above embodiment made in accordance with the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A wide temperature range radar / infrared multi-band stealth UAV leading edge component, characterized in that: It comprises a leading edge body made of a carbon fiber reinforced carbon-based composite material layer, the outer wall of the leading edge body is provided with an aerogel coating, the outer wall of the aerogel coating is provided with an inner skin, the outer wall of the inner skin is provided with a honeycomb sandwich structure layer, the outer wall of the honeycomb sandwich structure layer is provided with a frequency selective surface layer, the outer wall of the frequency selective surface layer is provided with an outer skin, and the outer wall of the outer skin is provided with an infrared coating.

2. The wide temperature range radar / infrared multi-band stealth UAV leading edge component according to claim 1, characterized in that: The thickness of the aerogel coating is 2-4 microns, the thickness of the inner skin is 1-2 centimeters, the thickness of the honeycomb sandwich structure layer is 2-4 centimeters, the thickness of the frequency selective surface layer is 0.5-1 centimeter, the thickness of the outer skin is 1-2 centimeters, and the thickness of the infrared coating is 1-2 microns.

3. The wide temperature range radar / infrared multi-band stealth UAV leading edge component according to claim 1, characterized in that: The frequency selective surface layer is prepared from metal units through a laser engraving process, the side length of the periodic unit is 4-5 cm, and the metal unit is circular with a diameter of 3-4 cm.

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