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An aircraft stealth steering gear bulge

A bulging and aircraft technology, which is applied in the field of aircraft stealth steering gear bulging, can solve problems such as hindering the application of conventional steering gear bulging, increasing aircraft radar scattering cross section, increasing radar scattering cross section, etc.

Active Publication Date: 2022-05-10
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cross-sectional shape of the bulge of the steering gear of a conventional aircraft is mostly rectangular, and the planes on both sides of the bulge form a dihedral angle with the main wing surface or the rudder surface, which will greatly increase the radar scattering cross section of the aircraft sideways, thereby improving the radar detection of the aircraft. probability; the mounting seat of the bulge protrudes from the surface of the wing surface and is not sharpened, which will increase the forward radar scattering cross section of the aircraft; the rear end surface of the bulge installed on the main wing surface is perpendicular to the main wing surface, which deteriorates the backward stealth performance
The above-mentioned shortcomings have hindered the application of conventional steering gear bulges on stealth aircraft

Method used

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  • An aircraft stealth steering gear bulge
  • An aircraft stealth steering gear bulge
  • An aircraft stealth steering gear bulge

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of aircraft stealth servo bulge, such as figure 1 As shown, the bulge includes a front bulge 2 and a rear bulge 3, the front bulge 2 is fixedly arranged on the main airfoil 1, and the rear bulge 3 is fixedly arranged on the rudder surface 4; Quadric surface; the inclination angle θ of the quadratic surface of the bulge is the same as the side inclination angle of the fuselage, so that the electromagnetic wave reflection peak formed by the vertical incident on the side of the bulge is merged into the side wave peak of the fuselage, reducing the aircraft side radar scattering cross section curve The number of peaks.

[0026] The appearance of the bulge of the steering gear of the present invention is a quadratic curved surface, the surface quality is high, and it is easy to form; the present invention realizes the integration of the electromagnetic wave reflection peak formed by the vertical incident on the side of the bulge into the wave peak of the side of the fu...

Embodiment 2

[0028] This embodiment is further optimized on the basis of embodiment 1, as figure 2 As shown, the mounting seat is also included, the mounting seat is embedded in the skin, and the upper surface of the mounting seat is flush with the surface of the airfoil, so as to prevent the electromagnetic wave incident on the step to form a specular reflection, and the mounting seat is sharpened. The bulge is formed by stamping aluminum alloy.

[0029] The invention embeds the bulging mounting seat into the skin, keeps the upper surface flush with the surface of the airfoil, and prevents electromagnetic waves from incident on the steps to form specular reflection. The Suso mount is flush with the airfoil and sharpened, which has the advantages of simple shape and good stealth performance.

[0030] Other parts of this embodiment are the same as those of Embodiment 1, so details are not repeated here.

Embodiment 3

[0032] This embodiment is further optimized on the basis of embodiment 1 or 2, as image 3 As shown, the conic section parameter of the quadric surface of the bulge is 0.7-0.8. The profiles of the front bulge 2 and the rear bulge 3 are all guided by the vertical guide line 5 and the horizontal guide line 6, and the longitudinal axis of the fuselage along the course is the ridge line, and the conic surface mode in the swept curved surface in CATIA take shape.

[0033] The present invention ensures that the side of the bulge is relatively close to the plane by setting the conic section parameter to be 0.7-0.8. The invention has the advantages of simple appearance and good performance of invisibility.

[0034] Other parts of this embodiment are the same as those of Embodiment 1 or 2 above, so details are not repeated here.

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Abstract

The invention discloses a bulge for a stealth steering gear of an aircraft. The bulge includes a front bulge and a rear bulge, and the front bulge is fixedly arranged on the main wing surface; The inclination angle θ of the quadric surface is set to be the same as the side inclination angle of the fuselage, so as to merge the electromagnetic wave reflection peaks formed by the vertical incident on the side of the bulge into the side peaks of the fuselage, and reduce the number of peaks of the aircraft's lateral radar scattering cross-section curve. The invention has the advantages of simple appearance and good performance of invisibility.

Description

technical field [0001] The invention belongs to the technical field of aircraft design, and in particular relates to a bulge of an aircraft stealth steering gear. Background technique [0002] Aircraft steering gear bulges are mainly used to dimension and rectify the steering gear and its rods, and reduce aerodynamic resistance. The cross-sectional shape of the bulge of the steering gear of a conventional aircraft is mostly rectangular, and the planes on both sides of the bulge form a dihedral angle with the main wing surface or the rudder surface, which will greatly increase the radar scattering cross section of the aircraft sideways, thereby improving the radar detection of the aircraft. probability; the mounting seat of the bulge protrudes from the surface of the wing surface and is not sharpened, which will increase the forward radar scattering cross section of the aircraft; the rear end surface of the bulge installed on the main wing surface is perpendicular to the main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C7/00
Inventor 梁爽张斌陆文卓聂暾李景虎周萍
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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