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A rudder surface of a radar stealth flexible aircraft

An aircraft rudder and radar stealth technology, which is applied to aircraft parts, aircraft control, transportation and packaging, etc., can solve the problems of reduced aerodynamic efficiency and increased radar echo, so as to improve the lift-to-drag ratio, increase the flight range of the aircraft, and restrain the flight. The effect of wave scattering

Active Publication Date: 2020-03-17
BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical solution of the present invention is to overcome the problems of reduced aerodynamic efficiency and increased radar echo when the rudder surface is deflected caused by the rigid rudder surface of the existing conventional aircraft, and proposes a flexible wave-transparent outer skin + rigid inner skin. Radar Stealth Flexible Rudder Surface Parts Based on Skeleton + Liquid Absorbing Material

Method used

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  • A rudder surface of a radar stealth flexible aircraft
  • A rudder surface of a radar stealth flexible aircraft

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 The rudder surface of the radar stealth flexible aircraft shown, the rudder surface as a whole is made up of two rigid sections 6 and 1 flexible section, and the flexible section is made up of outer skin 1, endoskeleton 2 and liquid wave-absorbing material 3; 6 is aluminum alloy, and the adjacent rigid sections 6 are connected by upper and lower outer skins 1, the outer skin 1 is made of silicon rubber material, and the inner skeleton 2 is aluminum alloy, located inside the outer skin 1, It is fixedly connected with the rigid section 6, and the endoskeleton 2 is connected to each other through the joint 4 and can rotate around the joint. The liquid absorbing material 3 is lubricating oil containing a commercially available solid radar wave absorbing agent, and the liquid absorbing The material 3 fills all space gaps between the outer skin 1 and the inner skeleton 2 . The maximum deflection angle of joint 4 is 40 degrees. The exposed surface of the rig...

Embodiment 2

[0028] Such as figure 2 The rudder surface of the radar stealth flexible aircraft shown is composed of three rigid sections 6 and two flexible sections as a whole, and the flexible section is composed of an outer skin 1, an endoskeleton 2 and a liquid wave-absorbing material 3; the rigid section 6 is a carbon fiber reinforced composite material, and the adjacent rigid sections 6 are connected through the upper and lower outer skins 1, the outer skin 1 is made of nitrile rubber material, and the inner skeleton 2 is aluminum alloy, located on the outer skin 1 inside, fixedly connected with the rigid section 6, the endoskeleton 2 is connected to each other through the joint 4 and can rotate around the joint, the liquid absorbing material 3 is lubricating oil containing a commercially available solid radar wave absorbing agent, The liquid wave-absorbing material 3 fills all the gaps between the outer skin 1 and the inner skeleton 2 . The cumulative maximum deflection angle of th...

Embodiment 3

[0030] Such as figure 2 The rudder surface of the radar stealth flexible aircraft shown is composed of three rigid sections 6 and two flexible sections as a whole, and the flexible section is composed of an outer skin 1, an endoskeleton 2 and a liquid wave-absorbing material 3; the rigid section 6 is a glass-dimensional reinforced composite material, and the adjacent rigid sections 6 are connected by upper and lower outer skins 1, the outer skin 1 is made of EPDM rubber material, and the inner skeleton 2 is a glass fiber reinforced composite material. The material is located inside the outer skin 1 and is fixedly connected with the rigid section 6. The inner skeleton 2 is connected to each other through the joint 4 and can rotate around the joint. The liquid absorbing material 3 is an aqueous solution containing sodium chloride, The liquid wave-absorbing material 3 fills all the gaps between the outer skin 1 and the inner skeleton 2 . The cumulative maximum deflection angle ...

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Abstract

The invention relates to a radar stealth flexible flight vehicle rudder component. The radar stealth flexible flight vehicle rudder component comprises an outer skin, an inner skeleton and a liquid wave-absorbing material. The outer skin is a wave-transparent synthetic rubber material with obvious shrinkability, the inner skeleton positioned inside the outer skin is a metal material or a fiber reinforced composite material, the inner skeleton is provided with one or more joints, and the liquid wave-absorbing material is one of a liquid material containing a solid radar wave absorbent and a solution containing an electrolyte. When the joints of the inner skeleton move, the outer skin can be driven to change the aerodynamic configuration of the rudder, and meanwhile, flowing of the liquid wave-absorbing material is caused, so that the shape of the rudder flexibly changes, and required operating force is generated. The rudder has the advantages that a second-order continuous streamline shape of the rudder remains all the time during the operation of the rudder in the aspect of aerodynamic performance, the lift-drag ratio can be obviously increased, and the voyage of the flight vehicleis increased; and in the aspect of radar stealth performance, due to the fact that continuous shape of the rudder remains all the time, and the traveling wave scattering of components can be inhibited obviously.

Description

technical field [0001] The invention belongs to the technical field of radar stealth, and in particular relates to a flexible rudder surface with radar stealth performance. The rudder surface can be applied to various military aircraft. It can increase the lift-to-drag ratio while reducing the detection ability of the enemy's radar on the attacker's weapons and equipment, and improve the battlefield survivability and surprise of our fighters, drones and cruise missiles. Defense ability. Background technique [0002] The rudder surface is an important active aerodynamic component of a military aircraft. When the rudder surface deflects, it provides the control force and torque required by the aircraft, and is also an important electromagnetic scattering component of the aircraft. Adopting the wing-body fusion shape is an important technical measure to reduce the coupling scattering between the rudder surface and the aircraft fuselage. However, since the rudder surface is a m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C9/00
CPCB64C9/00
Inventor 张松靖王轩王瑞
Owner BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH