CN106428625B - A kind of low scattering carrier for RCS tests - Google Patents
A kind of low scattering carrier for RCS tests Download PDFInfo
- Publication number
- CN106428625B CN106428625B CN201610825510.1A CN201610825510A CN106428625B CN 106428625 B CN106428625 B CN 106428625B CN 201610825510 A CN201610825510 A CN 201610825510A CN 106428625 B CN106428625 B CN 106428625B
- Authority
- CN
- China
- Prior art keywords
- low
- component
- carrier
- scattering
- rcs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses it is a kind of for RCS test low scattering carrier, including：Upper surface and lower surface；Wherein, lower surface is smooth surface；Upper surface is plane, is seamlessly connected with lower surface；Upper surface middle part sets flange-interface, for installing the component for carrying out RCS tests.Low scattering carrier provided by the invention and test component integrated structure design, smooth close connection, had not only eliminated edge-of-part scattering, but also blocked member lumens structure, and state when component is practical to install preferably is simulated, so as to allow the parts to more accurately carry out rcs measurement assessment.
Description
Technical Field
The invention relates to the field of electromagnetic scattering measurement, in particular to a low-scattering carrier for RCS (Radar Cross section) test.
Background
After the aircraft completes the design of the overall stealth appearance, the problem of stealth performance test of each part is considered. Once the component and the machine body are separated, the edge and the embedded structure of the component are exposed, and if the component is tested without any treatment, the scattering of the edge and the embedded structure of the component influences the testing accuracy of the component.
Therefore, a low-scattering carrier capable of eliminating the scattering of the edge of the component and shielding the inner cavity structure of the component is needed to solve the above problems.
Disclosure of Invention
The invention provides a low-scattering carrier for RCS (Radar Cross Section) testing, which is designed with an integrated structure with a testing part, is smoothly and tightly connected, eliminates the edge scattering of the part, shields the inner cavity structure of the part, and better simulates the state of the part during actual assembly, thereby enabling the part to more accurately carry out RCS measurement and evaluation.
The invention provides a low scattering carrier for RCS test, comprising: an upper surface and a lower surface; wherein, the lower surface is a smooth curved surface; the upper surface is a plane and is in seamless connection with the lower surface; and a flange interface is arranged in the middle of the upper surface and used for mounting a component for RCS test.
Preferably, the upper surface is shaped as a drop comprising two opposing tips.
Preferably, the upper surface has a forward interior angle and a rearward interior angle each between 10 degrees and 60 degrees; wherein, the preceding interior angle is the less angle in two tip angles, and the internal angle of backward is the bigger angle in two tip angles.
Preferably, the forward interior angle is 30 degrees.
Preferably, the flange interface recess is provided in the upper surface.
Preferably, the low scattering carrier is a hollow structure.
Preferably, the RCS of the low-scattering carrier is 20dBm lower than the RCS of the component2The above.
Preferably, the component is mounted to the flange interface by means of a countersunk screw; after the low-scattering carrier is installed, the head direction of the component is consistent with the forward direction of the low-scattering carrier, the edge of the bottom of the component is flush with the upper surface, and a gap between the bottom of the component and the upper surface is adhered through an aluminum foil; wherein the low scattering carrier forward direction is the direction at the forward interior angle.
Preferably, the surface roughness Ra of the upper surface and the lower surface is less than 1.6.
Preferably, the low scattering carrier has a length and width of 0.5 to 3 m and a height of 0.2 to 0.4 m.
According to the technical scheme, the low-scattering carrier provided by the invention can eliminate the edge scattering of the component, shield the inner cavity structure of the component, better simulate the state of the component in actual installation, and simultaneously has lower backscattering in a larger angle range, so that the RCS test of the component is not influenced, and the component can be more accurately subjected to RCS measurement and evaluation.
Drawings
FIG. 1 is a schematic diagram of a low scattering carrier structure for RCS testing according to an embodiment of the present invention;
FIG. 2 is a top view of a low scattering carrier for RCS testing according to an embodiment of the present invention;
FIG. 3 is a side view of a low scatter carrier for RCS testing according to an embodiment of the present invention;
fig. 4 is an oblique view of a low scattering carrier for RCS testing according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples of preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
The inventor of the invention considers that after the aircraft completes the design of the overall stealth appearance, the stealth performance test problem of each part is considered. Once the component and the machine body are separated, the edge and the embedded structure of the component are exposed, and if the component is tested without any treatment, the scattering of the edge and the embedded structure of the component influences the testing accuracy of the component. Therefore, the low-scattering carrier is designed to shield the edge and the embedded structure of the component, and the situation that the edge and the embedded structure cause scattering to influence the testing accuracy of the component RCS is avoided.
Fig. 1 shows the structure of the low scattering carrier for RCS test of the present invention, and referring to fig. 1, the low scattering carrier comprises an upper surface 3, a lower surface 4 and a flange interface 2.
Specifically, the upper surface 3 is a flat surface and is seamlessly connected to the lower surface 4. The lower surface 4 is a smooth curved surface. The upper surface 3 and the lower surface 4 have a high degree of finish, both of which have a surface roughness Ra (arithmetic mean deviation of the profile) of less than 1.6.
The flange interface 2 is arranged in the middle of the upper surface 3 and is used for installing a component 1 for RCS test.
In practical application, the flange interface 2 is recessed on the upper surface 3 of the low-scattering carrier in order to effectively shield the edge of the component 1 and the embedded structure. In this way, the bottom of the component 1 can be flush with the upper surface 3 of the low-scattering carrier after mounting. Meanwhile, the part of the low-scattering carrier close to the flange interface 2 is of a hollow structure, so that the part of the test component needing to be hidden can be conveniently accommodated, and the weight of the carrier can be reduced.
Preferably, the upper surface 3 is drop-shaped. Fig. 2 is a top view of the low scattering carrier of the present invention, and referring to fig. 2, the drop shape is a graph in which the horizontal direction is taken as the symmetry axis, and any one of the upper and lower parts is formed by two curves or a straight line and a curve which are connected in a tangent manner. Generally, the drop-shaped pattern includes two opposite tips, which may be formed by straight lines or curved lines, and the two tip angles have different sizes. The tip angle is defined as follows: when the tip is formed by straight lines, the two straight lines form a tip angle; when the tip is formed by a curve, two straight lines starting from the vertex and tangent to the two curves form a tip angle.
In a preferred embodiment of the invention, the smaller of the two tip angles is the internal forward angle, which is in the direction of the forward direction of the low scattering carrier; the larger of the two tip angles is the rearward interior angle.
In a particular application, the forward interior angle and the backward interior angle are both between 10 degrees and 60 degrees. According to electromagnetic scattering theory, the smaller the forward internal angle, the smaller the forward vertical polarization scattering of the low scattering carrier, but the larger the horizontal polarization scattering in some frequency bands. For this reason, the internal angle in the forward direction is preferably 30 degrees in the present invention, which is arranged to enable low scattering carriers to have less scattering in the full frequency band.
The low scattering carrier has a good surface current guiding effect, and when the component is subjected to head-to-head, side-to-side and back RCS testing, the low scattering carrier generates low scattering, so that the accuracy of a testing result is not influenced. The RCS of the low-scattering carrier was found to be 20dBm lower than that of the component2The above. In addition, the above-mentioned shape of the low-scattering carrier also makes the carrier have a smaller volume and weight.
When the low-scattering carrier is installed, the component 1 is installed on the flange interface 2 through a countersunk head screw, and in the process, the head direction of the component 1 is consistent with the forward direction of the low-scattering carrier. After the installation is finished, the edge of the bottom of the component 1 is flush with the upper surface 3, and gaps and screws between the bottom of the component 1 and the upper surface 3 are adhered through aluminum foil or conductive adhesive. In this way, the edges of the part and the embedded structure are shielded by the carrier, and its RCS can be accurately measured.
In practical application, the length and width of the low scattering carrier are both 0.5 to 3 meters, and the height is 0.2 to 0.4 meter. The length and width are distances in two directions from the upper surface 3, and the height is a height at which the lower surface 4 protrudes.
It should be noted that the low-scattering carrier and the target adopt an integrated structure design, which facilitates the target measurement and does not interfere with the accuracy of the target RCS. Meanwhile, the flange interface adopts a universal design, is suitable for various tested targets, and only needs to process the corresponding interface part during testing.
Fig. 3 shows a side view of the low scattering carrier of the present invention, and fig. 4 shows an oblique view of the low scattering carrier of the present invention.
The low-scattering carrier and the target are designed into an integrated structure, the low-scattering carrier and the target are smoothly and tightly combined, and gaps and screws are covered by aluminum foils or conductive adhesives, so that the scattering interference of the edge and inner cavity structures of the component can be eliminated, the effect of simulating the state of the component when the component is actually installed is achieved, and the low-scattering carrier and the target are of great importance for obtaining the real stealth characteristic of the component. The low-scattering carrier is suitable for various electromagnetic scattering test fields, so that the target can be accurately measured in various test environments. The invention is reliable and applicable, is easy to popularize and can generate good economic benefit and social benefit.
Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer readable storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (8)
1. A low scattering carrier for RCS testing, comprising: an upper surface and a lower surface; wherein,
the lower surface is a smooth curved surface;
the upper surface is a plane and is in seamless connection with the lower surface;
the middle part of the upper surface is provided with a flange interface for installing a component for RCS test;
wherein the upper surface is shaped as a drop comprising two opposing tips;
the upper surface has a forward interior angle and a rearward interior angle that are both between 10 degrees and 60 degrees; wherein, the preceding interior angle is the less angle in two tip angles, and the internal angle of backward is the bigger angle in two tip angles.
2. The low scattering carrier of claim 1, wherein the internal forward angle is 30 degrees.
3. The low scatter carrier of claim 2, said flange interface recess disposed on said upper surface.
4. The low scattering carrier according to claim 3, which is a hollow structure.
5. The low scatter carrier of claim 4 having an RCS 20dBm lower than that of the component2The above.
6. The low scatter carrier of claim 5, said component being mounted to said flange interface by a countersunk screw; after the low-scattering carrier is installed, the head direction of the component is consistent with the forward direction of the low-scattering carrier, the edge of the bottom of the component is flush with the upper surface, and a gap between the bottom of the component and the upper surface is adhered through an aluminum foil; wherein the low scattering carrier forward direction is the direction at the forward interior angle.
7. The low scattering carrier of claim 6, wherein the upper surface and the lower surface have a surface roughness Ra of less than 1.6.
8. The low scattering carrier according to any of claims 1-7, which has a length and width of 0.5 to 3 m and a height of 0.2 to 0.4 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610825510.1A CN106428625B (en) | 2016-09-14 | 2016-09-14 | A kind of low scattering carrier for RCS tests |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610825510.1A CN106428625B (en) | 2016-09-14 | 2016-09-14 | A kind of low scattering carrier for RCS tests |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106428625A CN106428625A (en) | 2017-02-22 |
| CN106428625B true CN106428625B (en) | 2018-06-08 |
Family
ID=58168322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610825510.1A Active CN106428625B (en) | 2016-09-14 | 2016-09-14 | A kind of low scattering carrier for RCS tests |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106428625B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344980B (en) * | 2018-01-10 | 2021-07-09 | 中国空空导弹研究院 | Foil strip cloud simulation device |
| CN108445463B (en) * | 2018-03-07 | 2020-05-29 | 北京环境特性研究所 | Low-scattering component RCS (radar cross section) testing method and carrier based on scattering center spatial filtering |
| CN109212504B (en) * | 2018-10-09 | 2023-10-20 | 北京环境特性研究所 | Low scattering carrier with both forward and sideways designs |
| CN109613502B (en) * | 2018-12-10 | 2023-02-17 | 中国航发四川燃气涡轮研究院 | Low-scattering shell for assembling binary nozzle engine |
| CN111504952B (en) * | 2020-04-15 | 2021-09-07 | 成都飞机工业（集团）有限责任公司 | Low-scattering carrier with both horizontal polarization and vertical polarization and testing method thereof |
| CN112798560B (en) * | 2020-12-24 | 2023-05-23 | 中国航空工业集团公司西安飞机设计研究所 | Carrier for estimating scattering characteristics of inner wall of cavity |
| CN113075634B (en) * | 2021-03-29 | 2023-02-24 | 北京环境特性研究所 | RCS (radar cross section) evaluation carrier for vertical polarized waves |
| CN113075626A (en) * | 2021-03-31 | 2021-07-06 | 北京环境特性研究所 | Low-scattering carrier for darkroom background level evaluation test |
| CN113419224A (en) * | 2021-06-07 | 2021-09-21 | 西北工业大学 | Axisymmetric double-emission low-scattering carrier for RCS test and application method thereof |
| CN113532865B (en) * | 2021-06-24 | 2022-06-07 | 中国航发沈阳发动机研究所 | Low-scattering carrier suitable for various engines |
| CN114044164B (en) * | 2021-11-10 | 2023-06-27 | 北京环境特性研究所 | Low-scattering carrier for RCS (wing component handling System) test of wing component |
| CN114104331B (en) * | 2021-11-12 | 2023-06-30 | 北京环境特性研究所 | Wave absorber for reducing low-frequency dispersion |
| CN114162347B (en) * | 2021-12-09 | 2023-06-27 | 北京环境特性研究所 | P-band low-scattering carrier and application method thereof |
| CN116629109B (en) * | 2023-05-16 | 2024-05-24 | 中国电子科技集团公司第五十四研究所 | Low-scattering carrier optimization design method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6639567B2 (en) * | 2001-09-14 | 2003-10-28 | Raytheon Company | Low radar cross section radome |
| CN201107406Y (en) * | 2007-11-23 | 2008-08-27 | 中国航天科工集团第二研究院二○七所 | Metal support for low RCS test |
| CN203512020U (en) * | 2013-10-18 | 2014-04-02 | 深圳光启创新技术有限公司 | Wing structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013160705A (en) * | 2012-02-08 | 2013-08-19 | Mitsubishi Electric Corp | Radar cross-sectional area measurement system |
-
2016
- 2016-09-14 CN CN201610825510.1A patent/CN106428625B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6639567B2 (en) * | 2001-09-14 | 2003-10-28 | Raytheon Company | Low radar cross section radome |
| CN201107406Y (en) * | 2007-11-23 | 2008-08-27 | 中国航天科工集团第二研究院二○七所 | Metal support for low RCS test |
| CN203512020U (en) * | 2013-10-18 | 2014-04-02 | 深圳光启创新技术有限公司 | Wing structure |
Non-Patent Citations (1)
| Title |
|---|
| 飞机部件RCS测试用载体设计技术研究;刘晓春等;《现代雷达》;20160228;第38卷(第2期);第90-94页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106428625A (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106428625B (en) | A kind of low scattering carrier for RCS tests | |
| CN106443611B (en) | RCS (radar cross section) measuring method of weak scattering target | |
| Murayama et al. | Experimental study on slat noise from 30P30N three-element high-lift airfoil at JAXA hard-wall lowspeed wind tunnel | |
| Spalart et al. | Analysis of experimental and numerical studies of the rudimentary landing gear | |
| CN110298063B (en) | Non-compact permeable boundary aerodynamic noise numerical integral calculation method | |
| CN110954868A (en) | Low-scattering shell for engine suitable for electromagnetic test of external field wind environment | |
| CN114044164B (en) | Low-scattering carrier for RCS (wing component handling System) test of wing component | |
| CN110274920A (en) | The method of honorable subdivision Shooting and bouncing rays analysis metal medium target transient response | |
| CN105116393A (en) | Method for estimating flight height of high-altitude object and radar sectional area based on position fingerprint | |
| CN104267381B (en) | Combination type nose cone shape electromagnetic scattering datum mark model | |
| CN117408175A (en) | Plasma flow control heat flow measurement test design method | |
| Choudhari et al. | Slat noise simulations: Status and challenges | |
| CN114162347B (en) | P-band low-scattering carrier and application method thereof | |
| CN105891788A (en) | Rotary body for extracting echoes of metal support and echo extracting device | |
| Golubev et al. | Distinctive features of pressure fluctuation fields on the surface of steps | |
| CN114912326A (en) | Simulation method based on time-varying plasma sheath identification technology | |
| CN113075626A (en) | Low-scattering carrier for darkroom background level evaluation test | |
| Zhuang et al. | A novel simulation approach of aircraft dynamic RCS | |
| CN217227954U (en) | Low-scattering carrier for RCS test and evaluation of wing trailing edge | |
| CN104569942A (en) | Monostation radar target characteristic measurement method for identifying positions of synchronous scattering points | |
| CN216783896U (en) | Carrier for designing and testing aircraft seeker | |
| CN203672980U (en) | Real environment simulated RF test tool | |
| van Deursen et al. | Window sensor for the A350 and A380 aircraft | |
| CN116859355A (en) | Low-scattering carrier for RCS test | |
| CN117849741A (en) | Low-scattering carrier for RCS (RCS) test of thin-wing-shaped target |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |