Lateral low-scattering carrier of head radar cabin

Abstract

The utility model provides a lateral low-scattering carrier for a nose radar cabin, and belongs to the technical field of aircraft radar cabin stealth testing, and the lateral low-scattering carrier comprises a nose triangular body used for replacing a nose radar cabin with the same shape and a lateral rear carrier located on the rear side of the nose triangular body; the machine head triangular body comprises a side edge and a bottom edge, and the machine head triangular body is integrally connected with the lateral rear carrier at the bottom edge, the lateral rear carrier comprises an outer arc rear edge and an inner arc rear edge, wherein the outer arc rear edge is in smooth large-angle transition from the outer edge of the bottom edge of the machine head triangular body to one side, the inner arc rear edge is in smooth small-angle transition from the inner edge of the machine head triangular body to the same side, and the arc shape of the outer arc rear edge and the arc shape of the inner arc rear edge converge and intersect to form a lateral tip included angle.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aircraft radar cabin stealth test, and particularly relates to a low-scattering carrier for lateral side of a nose radar cabin. BACKGROUND

[0002] In the detection environment of more and more ground-based, sea-based and air-based radars, in order to be not discovered, an advanced combat platform must have a full-directional stealth penetration capability. The nose radar cabin of an aircraft is one of the three traditional strong scattering sources of an aircraft, and a full-directional wave-absorbing structure design needs to be performed on the radar cabin. In order to evaluate the wave-absorbing effect of the nose radar cabin, the nose radar cabin needs to be tested, and the scattering of the rear body or internal support of the lateral carrier cannot greatly interfere with the test piece. Firstly, the metallized test piece is tested to obtain the low-scattering carrier benchmark data of the metallized nose radar cabin, then the real nose radar cabin section is replaced to test the frequency selection structure nose radar cabin, the data of the frequency selection state nose radar cabin is obtained, and finally, the stealth performance of the frequency selection structure nose radar cabin is identified and evaluated according to the overall evaluation requirements.

[0003] When the nose radar cabin is isolated from the nose structure, the edge and embedded structure of the front section of the nose radar cabin are exposed, and if the nose radar cabin is tested without any treatment, the scattering of the truncated edge and embedded structure will greatly affect the test accuracy of the nose radar cabin. At the same time, the forward angle range (-45°~+45°, -180°~-135°, +135°~+180°) of the traditional radar cabin can be tested by an olive water drop, but the lateral angle range (-135°~-45° or +45°~+135°) has not been tested.

[0004] Therefore, a low-RCS carrier for the lateral side is needed, which forms a streamlined whole with the nose radar cabin to more accurately perform lateral RCS measurement and evaluation, so as to realize full-directional RCS test of the nose radar cabin. CONTENT OF THE INVENTION

[0005] The application aims to provide a low-scattering carrier for the lateral side of a nose radar cabin to solve or alleviate at least one problem in the background art.

[0006] The technical scheme of the present application is: a nose radar cabin lateral low-scattering carrier, comprising: a nose triangular body for replacing a nose radar cabin of the same shape and a lateral rear carrier located at the rear side of the nose triangular body; the nose triangular body comprises side edges and a bottom edge, and the nose triangular body is connected with the lateral rear carrier integrally at the bottom edge, wherein the lateral rear carrier comprises an outer arc line rear edge that is smoothly and greatly transitioned to one side from the outer edge of the bottom edge of the nose triangular body and an inner arc line rear edge that is smoothly and slightly transitioned to the same side from the inner edge, and the arc convergence of the outer arc line rear edge and the inner arc line rear edge intersects to form a lateral tip included angle.

[0007] In an optional embodiment of the present application, the nose triangular body is an isosceles triangle, and the two side edges are symmetrical to the center line of the nose triangular body.

[0008] In an optional embodiment of the present application, the head of the nose triangular body is clamped by the two side edges to form a tip included angle of a predetermined angle, and the tip included angle is 30-45 degrees.

[0009] In an optional embodiment of the present application, the nose triangular body comprises a nose upper surface and a nose lower surface, and the nose upper surface and the nose lower surface are both curved surface structures and are connected by curved arc lines at the side edges.

[0010] In an optional embodiment of the present application, the lateral rear carrier comprises a rear carrier upper surface and a rear carrier lower surface, and the rear carrier upper surface and the rear carrier lower surface are both curved surface structures and are connected by curved arc lines at the outer arc line rear edge and the inner arc line rear edge.

[0011] In an optional embodiment of the present application, the nose upper surface and the nose lower surface of the nose triangular body and the rear carrier upper surface and the rear carrier lower surface of the lateral rear carrier are smoothly and closely connected by a C-shaped connector arranged at the bottom edge.

[0012] In an optional embodiment of the present application, the C-shaped connector is connected to the nose triangular body at the neat side, and the clamping side of the C-shaped connector is connected to the lateral rear carrier.

[0013] In an optional embodiment of the present application, the lateral rear carrier is made of a metal material.

[0014] In an optional embodiment of the present application, the metal material comprises an aluminum alloy.

[0015] The nose radar cabin low-scattering carrier of the present application is simple and practical, has strong operability, is suitable for nose radar cabin structures with stealth evaluation requirements, has low cost, is convenient to process, has high feasibility, can be quickly realized, has relatively low cost, and has controllable cost in improvement and optimization design. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions provided by the present application, the following will briefly introduce the drawings. Obviously, the drawings described below are only some embodiments of the present application.

[0017] Fig. 1 is a top view of a nose radar pod side low-scattering carrier structure of the present application.

[0018] Fig. 2 is a side view of a nose radar pod side low-scattering carrier structure of the present application.

[0019] Fig. 3 is an axial side view of a nose radar pod side low-scattering carrier structure of the present application.

[0020] Reference signs:

[0021] 10 - nose triangular body

[0022] 11 - side edge

[0023] 12 - tip included angle

[0024] 13 - bottom edge

[0025] 14 - nose upper surface

[0026] 15 - nose lower surface

[0027] 20 - side rear carrier

[0028] 21 - outer arc rear edge

[0029] 22 - inner arc rear edge

[0030] 23 - side tip included angle

[0031] 24 - rear carrier upper surface

[0032] 25 - rear carrier lower surface DETAILED DESCRIPTION

[0033] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in combination with the drawings in the embodiments of the present application.

[0034] The present application provides a nose radar pod side low-scattering carrier for performing side RCS test evaluation of a radar pod, to solve or alleviate at least one problem in the background art.

[0035] As Figs. 1-3As shown, the side low-scattering carrier of the nose radar cabin provided by the present application comprises a nose triangular body 10 for replacing a nose radar cabin of the same shape and a side rear carrier 20 located at the rear side of the nose triangular body 10, and the nose triangular body 10 and the side rear carrier 20 combine to form a complete integral carrier, which is in the shape of a horn as a whole.

[0036] In the present application, the nose triangular body 10 is composed of two side edges 11 and a bottom edge 13, and the head of the nose triangular body 10 is clamped by the two side edges 11 to form a predetermined angle of a tip included angle 12, and the tip included angle 12 of the nose triangular body 10 is transitionally connected to the front end of the side rear carrier 20 relative to the bottom edge 13 on one side, so that the side rear carrier 20 can cover the nose triangular body 10 (i.e. the nose radar cabin of the same shape).

[0037] In some embodiments of the present application, the side edge 11 can be a combination structure of straight lines extending to both sides of the bottom edge 13 from the tip included angle 12, or a single arc structure, so as to reduce the scattering of the traveling wave. Fig. 1 In the embodiment shown, the side edge 11 is a combination structure of straight lines and micro-arc lines, and the part connecting the tip included angle 13 is a straight line converging arc, and a part is extended backward from the end of the straight line and the end points on both sides of the bottom edge 13.

[0038] In the present application, the tip included angle 12 of the nose triangular body 10, i.e. the swept-back angle formed by the two side edges 11, can be adjusted to an appropriate angle as needed. Preferably, the angle of the tip included angle 12 can be configured to be 30-45 degrees. The angle can make the edge strong scattering peak position of the side low-scattering carrier appear at the swept-back angle, so as to deviate from the forward attention angle domain and reduce the forward scattering.

[0039] In the present application, the nose triangular body 10 is an isosceles triangle, i.e. the two side edges 11 are mirror-symmetrical relative to the center line of the nose triangular body 10 (i.e. the vertical line from the tip included angle 12 to the bottom edge 13 on one side).

[0040] In the present application, the side rear carrier 20 comprises an outer arc rear edge 21 which is smoothly and angularly transitioned to one side from the outer edge of the bottom edge 13 of the nose triangular body 10, and an inner arc rear edge 22 which is smoothly and angularly transitioned to the same side from the inner edge of the bottom edge 13 of the nose triangular body 10, and the arc convergence of the outer arc rear edge 21 and the inner arc rear edge 22 forms a side tip included angle 23. Among them, the outer arc rear edge 21 and the inner arc rear edge 22 of the side rear carrier 20 are connected to the side edges of the nose triangular body 10 through straight lines and arcs.

[0041] In the application, the head triangular body 10 and the lateral rear carrier 20 are connected by the C-shaped connector 30 arranged at the bottom edge 13, the C-shaped connector 30 is connected to the head triangular body 10 in a neat side, the clamping side of the C-shaped connector 30 is connected to the lateral rear carrier 20, and the upper and lower surfaces of the C-shaped connector 30 form a smooth transition between the head triangular body 10 and the lateral rear carrier 20.

[0042] In the application, the lateral rear carrier 20 is made of a metal material, for example, it can be made of an aluminum alloy material.

[0043] In the application, the head triangular body 10 is composed of a head upper surface 14 and a head lower surface 15, both of which are curved surface structures, and the two surfaces are connected by a curved arc at the side edge 11 to further reduce the surface row wave scattering of the triangular body 10. Similarly, the lateral rear carrier 20 is composed of a rear carrier upper surface 24 and a rear carrier lower surface 25, both of which are curved surface structures, and the two surfaces are connected by a curved arc at the outer arc rear edge 21 and the inner arc rear edge 22.

[0044] Further, the upper and lower surfaces of the head triangular body 10 and the lateral rear carrier 20 can be designed in an integrated structure, which are smoothly and closely connected, eliminating the truncated edge scattering of the triangular body, shielding the rear inner cavity structure, and better simulating the actual installation state of the head radar cabin.

[0045] A large number of analysis and verification prove that the low scattering carrier of the application is simple and practical, has strong operability, is suitable for the head radar cabin structure with stealth evaluation demand, has low cost, convenient processing, high feasibility, can be quickly realized, has low cost, and the cost is controllable in the improvement and optimization design.

[0046] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the application, which should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A nose radar pod side low-scatter carrier, characterized by, The application relates to a nose triangle body and a lateral rear carrier behind the nose triangle body for replacing a nose radar cabin of the same shape. The nose triangle body comprises side edges and a bottom edge, and the nose triangle body is connected with the lateral rear carrier integrally at the bottom edge, wherein the lateral rear carrier comprises an outer arc rear edge which is smoothly and greatly transitioned from the outer edge of the bottom edge of the nose triangle body to one side and an inner arc rear edge which is smoothly and slightly transitioned from the inner edge of the bottom edge of the nose triangle body to the same side, and the arc convergence of the outer arc rear edge and the inner arc rear edge is intersected to form a lateral tip angle. The nose triangle body is an isosceles triangle, and the two side edges are symmetrical to the middle line of the nose triangle body.

2. The side-looking low-scatter radome of claim 1, wherein, The head of the nose triangle body is clamped by the two side edges to form a tip angle with a predetermined angle, and the tip angle is 30-45 degrees.

3. The side-looking low-scatter radome of claim 2, wherein, The nose triangle body comprises a nose upper surface and a nose lower surface, and the nose upper surface and the nose lower surface are both curved surface structures and are connected by curved arcs at the side edges.

4. The side-looking low-scatter radome of any one of claims 1 to 3, wherein, The lateral rear carrier comprises a rear carrier upper surface and a rear carrier lower surface, and the rear carrier upper surface and the rear carrier lower surface are both curved surface structures and are connected by curved arcs at the outer arc rear edge and the inner arc rear edge.

5. The side-looking low-scatter radome of claim 4, wherein, The nose upper surface and the nose lower surface of the nose triangle body and the rear carrier upper surface and the rear carrier lower surface of the lateral rear carrier are smoothly and closely connected by a C-shaped connector arranged at the bottom edge.

6. The side-looking low-scatter radome of claim 5, wherein, The C-shaped connector is connected with the nose triangle body at the neat side, and the clamping side of the C-shaped connector is connected with the lateral rear carrier.

7. The side-looking low-scatter radome of claim 6, wherein, The lateral rear carrier is made of a metal material.

8. The side-looking low-scatter radome of the nose cone of claim 1, wherein, The metal material comprises an aluminum alloy.

9. The side-looking low-scatter radome of claim 8, wherein, ​

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