Antenna aperture stealth shape design method conformal with aircraft skin and aircraft

Abstract

The invention provides an antenna aperture stealth shape design method conformal with an aircraft skin and an aircraft, and belongs to the field of stealth aircraft aerodynamic shape design. The method comprises the steps that S10, the aircraft skin shape of an antenna aperture mounting area and the antenna aperture center point position are acquired; s20, selecting a universal carrier three-dimensional model, and replacing the aircraft skin shape of the antenna aperture mounting area with an initial carrier three-dimensional model formed by a universal carrier surface shape; s30, according to the stealth performance requirement of the antenna aperture, the initial carrier three-dimensional model is imported into electromagnetic simulation software for simulation optimization, and an optimized carrier three-dimensional model is obtained; and S40, determining an antenna aperture shape and a structure installation parameter, forming a cavity opening conforming to the antenna aperture shape and the structure installation parameter at the antenna aperture center point position of the optimized carrier three-dimensional model, and performing simulation optimization according to the stealth performance requirement to obtain an antenna aperture stealth shape conforming to the aircraft skin and conforming to the requirement.

Description

Technical Field

[0001] The present application belongs to the field of aerodynamic shape design of stealth aircraft, and in particular to a method for designing antenna aperture shape based on stealth performance and an aircraft. Background Art

[0002] To ensure external interaction and mission execution, stealth aircraft must be equipped with communication, navigation, detection and other sensors. In order to meet the radar stealth requirements of the entire aircraft, the antenna aperture stealth performance of these sensors needs to meet the standards. First of all, the shape needs to be consistent with the aircraft skin shape angle, and the scattering should be concentrated as much as possible on the electromagnetic window of the aircraft. This requires an antenna aperture stealth shape design method to guide designers to carry out antenna aperture design, ensuring that the antenna aperture shape designed by each designer is consistent and meets the stealth index requirements.

[0003] In view of this, in order to ensure the consistency of the antenna aperture stealth shape from the design point of view, avoid the defects in the antenna aperture stealth design caused by human factors, and effectively improve the stealth effect of the carrier radar, a method for antenna aperture stealth shape design is needed. Summary of the invention

[0004] The purpose of the present application is to provide a method for designing a stealth shape of an antenna aperture that is conformal to the aircraft skin and an aircraft, so as to solve or alleviate at least one problem in the background technology.

[0005] The technical solution of the present application is: a method for designing a stealth shape of an antenna aperture conforming to an aircraft skin, characterized by comprising:

[0006] S10, obtaining the aircraft skin shape of the antenna aperture installation area and the center point position of the antenna aperture;

[0007] S20, selecting a universal carrier three-dimensional model, and replacing the aircraft skin shape of the antenna aperture installation area with an initial carrier three-dimensional model formed by the universal carrier surface shape;

[0008] S30, according to the stealth performance requirements of the antenna aperture, the initial carrier three-dimensional model is imported into the electromagnetic simulation software for simulation optimization to obtain an optimized carrier three-dimensional model;

[0009] S40, determining the antenna aperture shape and structural installation parameters, opening a cavity that meets the antenna aperture shape and structural installation parameters at the center point of the antenna aperture of the optimized carrier three-dimensional model, and performing simulation optimization according to stealth performance requirements to obtain an antenna aperture stealth shape that meets the requirements and is conformal to the aircraft skin.

[0010] In a preferred embodiment of the present application, the universal carrier three-dimensional model includes a water drop-shaped model and an apricot kernel-shaped model.

[0011] In a preferred embodiment of the present application, the stealth performance requirements of the antenna aperture include assessment frequency band, frequency point, angular domain, polarization mode, and RCS index requirements.

[0012] In a preferred embodiment of the present application, the electromagnetic simulation software includes FETO and CST.

[0013] In a preferred embodiment of the present application, the outer shape of the antenna aperture includes a rhombus, a regular polygon, and a sawtooth shape.

[0014] In a preferred embodiment of the present application, the antenna aperture structure installation parameters include on-board installation position, angle, installation edge size, and cavity size.

[0015] In addition, the present application provides an aircraft, comprising an aircraft skin and an antenna aperture installed on the aircraft skin, wherein the aircraft skin and the antenna aperture are designed according to any of the above-described methods for designing a stealth shape of an antenna aperture that is conformal to the aircraft skin.

[0016] The antenna aperture external stealth shape design method provided in the present application fundamentally ensures the consistency between the antenna aperture shape and the aircraft skin shape, avoids defects in the aircraft skin shape design due to insufficient experience of designers, reflects radar waves to the electromagnetic window of the carrier aircraft, effectively reduces the RCS of the antenna aperture, and facilitates frequent movement of the antenna aperture position in the early design of the aircraft, quickly generates the antenna aperture stealth shape, improves the design iteration speed, and thereby improves the stealth effect after the antenna is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0018] Figure 1 Schematic diagram of the antenna aperture stealth shape design method of the present application.

[0019] Figure 2 Schematic diagram of the aircraft skin and antenna aperture center points in one embodiment of the present application.

[0020] Figure 3 A schematic diagram of a three-dimensional model of a universal carrier according to an embodiment of the present application.

[0021] Figure 4 This is a schematic diagram of a three-dimensional model of an optimized carrier that meets the stealth performance requirements in one embodiment of the present application.

[0022] Figure 5 FIG. 1 is a schematic diagram of an antenna aperture shape according to an embodiment of the present application.

[0023] Figure 6This is a schematic diagram of the optimized carrier three-dimensional model after cavity opening according to one embodiment of the present application.

[0024] Figure 7 This is the stealth shape of the antenna aperture of an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0026] like Figure 1 As shown, the antenna aperture stealth shape design method provided in this application includes the following steps:

[0027] S10, obtaining the aircraft skin shape of the antenna aperture installation area and the center point position of the antenna aperture.

[0028] like Figure 2 As shown, the aircraft skin 11 in the antenna aperture installation area is a local skin model of the antenna aperture at the carrier aircraft installation position, which is usually a curved surface, and the antenna aperture center point 11 is located at a certain position of the aircraft skin 10.

[0029] It should be noted that the antenna aperture center point 11 is the installation center point of the antenna aperture, not specifically the geometric center point. Figure 2 In the illustrated embodiment, the location of the antenna aperture center point 11 is only for illustration and is not necessarily located at the center of the aircraft skin 11 .

[0030] S20, selecting a suitable universal carrier three-dimensional model, so that the outer shape of the aircraft skin 11 in the antenna aperture installation area is replaced with an initial carrier three-dimensional model formed by the universal carrier surface shape.

[0031] In the preferred embodiment of the present application, the universal carrier three-dimensional model includes water drop-shaped, apricot kernel-shaped and other structural modules, such as Figure 3 Shown is a schematic diagram of the three-dimensional model of the amygdala-shaped initial carrier provided in this embodiment of the present application.

[0032] S30, according to the stealth performance requirements of the antenna aperture, the initial carrier three-dimensional model is imported into the electromagnetic simulation software for simulation optimization to obtain an optimized carrier three-dimensional model.

[0033] In this application, stealth performance requirements include assessment frequency bands, frequency points, angular domains, polarization modes, and RCS (Radar Cross Section) index requirements.

[0034] In some embodiments of the present application, the electromagnetic simulation software includes FEKO or CST, etc.

[0035] like Figure 4 Shown is a schematic diagram of an optimized carrier three-dimensional model after the initial carrier three-dimensional model is optimized according to the stealth performance requirements in this embodiment of the present application.

[0036] S40, determining the antenna aperture shape and structural installation parameters, opening a cavity that meets the antenna aperture shape and structural installation parameters at the center point of the antenna aperture of the optimized carrier three-dimensional model, and performing simulation optimization according to stealth performance requirements to obtain an antenna aperture stealth shape that meets the requirements and is conformal to the aircraft skin.

[0037] In some embodiments of the present application, the shape of the antenna aperture includes a rhombus, a regular polygon, a sawtooth, etc. Figure 5 The above is a schematic diagram of the rectangular antenna aperture of this embodiment of the present application. The antenna aperture structure installation parameters include the on-board installation position or coordinates, angle, installation edge size, cavity size, etc. Figure 6 The above is a schematic diagram of opening a cavity on the optimized carrier three-dimensional model in this embodiment of the present application.

[0038] like Figure 7 Shown is a schematic diagram of the stealth shape of the antenna aperture in this embodiment of the present application that meets the requirements of conformity with the aircraft skin and stealth performance.

[0039] On this basis, the present application has approved an aircraft, which includes an aircraft skin and an antenna aperture installed on the aircraft skin. The aircraft skin and the antenna aperture are designed according to the above-mentioned antenna aperture external stealth shape design method.

[0040] The antenna aperture external stealth shape design method provided in the present application fundamentally ensures the consistency between the antenna aperture shape and the aircraft skin shape, avoids defects in the aircraft skin shape design due to insufficient experience of designers, reflects radar waves to the electromagnetic window of the carrier aircraft, effectively reduces the RCS of the antenna aperture, and facilitates frequent movement of the antenna aperture position in the early design of the aircraft, quickly generates the antenna aperture stealth shape, improves the design iteration speed, and thereby improves the stealth effect after the antenna is installed.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for designing a stealth shape of an antenna aperture conforming to the aircraft skin, characterized in that: include: S10, obtaining the aircraft skin shape of the antenna aperture installation area and the center point position of the antenna aperture; S20, selecting a universal carrier three-dimensional model, and replacing the aircraft skin shape of the antenna aperture installation area with an initial carrier three-dimensional model formed by the universal carrier surface shape; S30, according to the stealth performance requirements of the antenna aperture, the initial carrier three-dimensional model is imported into the electromagnetic simulation software for simulation optimization to obtain an optimized carrier three-dimensional model; S40, determining the antenna aperture shape and structural installation parameters, opening a cavity that meets the antenna aperture shape and structural installation parameters at the center point of the antenna aperture of the optimized carrier three-dimensional model, and performing simulation optimization according to stealth performance requirements to obtain an antenna aperture stealth shape that meets the requirements and is conformal to the aircraft skin.

2. The method for designing a stealth shape of an antenna aperture conforming to the aircraft skin as claimed in claim 1, characterized in that: The universal carrier three-dimensional model includes a water drop-shaped model and an apricot kernel-shaped model.

3. The method for designing a stealth shape of an antenna aperture conforming to the aircraft skin as claimed in claim 1, characterized in that: The stealth performance requirements of the antenna aperture include assessment frequency band, frequency point, angular domain, polarization mode, and RCS index requirements.

4. The method for designing a stealth shape of an antenna aperture conforming to the aircraft skin as claimed in claim 1, characterized in that: The electromagnetic simulation software includes FETO and CST.

5. The method for designing a stealth shape of an antenna aperture conforming to the aircraft skin as claimed in claim 1, characterized in that: The antenna aperture may have a rhombus, a regular polygon, or a sawtooth shape.

6. The method for designing a stealth shape of an antenna aperture conforming to the aircraft skin as claimed in claim 5, characterized in that: The antenna aperture structure installation parameters include the on-board installation position, angle, installation edge size, and cavity size.

7. An aircraft, comprising an aircraft skin and an antenna aperture mounted on the aircraft skin, characterized in that: The aircraft skin and antenna aperture are designed according to the method for designing a stealth shape of an antenna aperture conformal to the aircraft skin as described in any one of claims 1 to 6.

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