Background interference cancellation fine-tuning device used for RCS testing

A fine-tuning device and background technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of easy shaking of support rods, poor background cancellation accuracy, etc., to avoid mutual adverse effects, improve test accuracy, and eliminate position changes. Effect

Active Publication Date: 2019-03-29
CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a background cancellation fine-tuning device for RCS testing, which is used to solve the background cancellation caused by the easy shaking of the support rod during the test Technical issues with poor precision

Method used

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  • Background interference cancellation fine-tuning device used for RCS testing
  • Background interference cancellation fine-tuning device used for RCS testing
  • Background interference cancellation fine-tuning device used for RCS testing

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0029] The present invention proposes a fine-tuning device for canceling the background of a long rod, which includes three constant pullers 1 , three electrically driven horns 2 , a wave-absorbing material sleeve 3 and an acceleration sensor 4 . Three electric-driven shims 2 and three constant pullers 1 are evenly and cross-arranged between the absorbing material sleeve 3 and the fixed base 5, and the structure is as follows: figure 1 and figure 2 shown.

[0030] The wave-absorbing material sleeve 3 provides a protective shell for its internal support rod, and its outer surface is responsible for bonding the wave-absorbing material. The iron 2 performs attitude adjustment on the basis of the elastic adjustment margin of the constant puller 1 .

[0031] In order to ensure the accuracy of background cancellation, the radial displacement of the top end of t...

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Abstract

The invention belongs to the technical field of aircraft RCS testing, and relates to a background interference cancellation fine-tuning device used for the RCS testing. The device comprises an absorbing material sleeve (3), three constant pullers (1), three electric driving pad irons (2), and an acceleration sensor (4). By adjusting a lock nut (12) of the constant puller (1), a disc spring set islocked and pressed. A base of the absorbing material sleeve (3) is fixed and is provided with an elastic adjustment range. The different postures of the absorbing material sleeve (3) can be flexibly adapted. Three sets of electric driving pad irons (2) respectively adjust the upper and lower positions of a wedge-shaped upper platform (26), adjust the inclination angle of the absorbing material sleeve (3) by the height change of three support points, and eliminate the radial displacement of the top end of the absorbing material sleeve (3), thereby achieving precise adjustment of the position ofthe absorbing material to ensure the background interference cancellation effect. The acceleration sensor (4) realizes the automatic control adjustment of the radial displacement of the absorbing material sleeve (3) and improves the fine-tuning efficiency of the background interference cancellation.

Description

technical field [0001] The invention belongs to the technical field of aircraft radar testing, in particular to a background cancellation fine-tuning device for RCS testing. Background technique [0002] During the RCS (Radar-Cross-Section) test of the aircraft, it is necessary to use slender rods to support the flight equipment to simulate the high-altitude state. This type of test usually requires full coverage of absorbing materials on structural parts and building surfaces other than aircraft to achieve darkroom background cancellation. This coverage also includes the support bars that support the aircraft. However, as a direct load-bearing component, the support rod is prone to axial and radial deformation; and the fixed end of the support rod (length-to-diameter ratio ≥ 30) is at the bottom of the rod. During the operation of the equipment, the top of the rod is prone to shaking. The direct coverage of the absorbing material on the surface of the support rod is not c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 李宽姚利明张亮亮柳慧泉麻恒进张健刘蕾赵宪芳杨帅范钰伟徐东臣高伟光邓乐武邓勇
Owner CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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