CN112051554A - Intelligent air battle environment and ground clutter interference simulation method - Google Patents
Intelligent air battle environment and ground clutter interference simulation method Download PDFInfo
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- CN112051554A CN112051554A CN202010923635.4A CN202010923635A CN112051554A CN 112051554 A CN112051554 A CN 112051554A CN 202010923635 A CN202010923635 A CN 202010923635A CN 112051554 A CN112051554 A CN 112051554A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/38—Jamming means, e.g. producing false echoes
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Abstract
The invention discloses an intelligent air combat environment and ground clutter interference simulation method, which belongs to the technical field of air combat simulation, and comprises a ground clearance angle calculation step and a signal-to-clutter ratio calculation step, and is characterized in that: the ground wiping angle of the radar wave beam can be obtained through the ground wiping angle calculation step, and the ground wiping angle of the radar wave beam can be used for judging whether ground clutter affects the radar detection capability of the local machine; the clutter area can be obtained through the signal-to-clutter ratio calculation step, and the signal-to-clutter ratio can be obtained through calculation of the clutter area, and can be used for rapidly judging whether the target can be detected and tracked under the condition of ground clutter interference. The technical effects are as follows: the method can effectively simulate the influence of ground clutter interference, can accurately calculate the signal-to-clutter ratio by only a small number of parameters, and has small simulation calculation amount.
Description
Technical Field
The invention belongs to the technical field of air combat simulation, and particularly relates to an intelligent air combat environment and ground clutter interference simulation method.
Background
Ground clutter interference can significantly shorten the detection range of airborne radar and radar guidance heads and thus affect the operational performance of fighters in air combat. Therefore, when the intelligent air combat simulation is carried out, the influence of ground clutter interference on an airborne radar and a radar seeker needs to be accurately simulated, otherwise, the accuracy of an intelligent air combat simulation result is seriously influenced. The existing ground clutter interference simulation method has large simulation calculation amount and is difficult to be applied to intelligent air combat simulation which needs electromagnetic simulation calculation on a large number of airplanes and missiles. In addition, the existing ground clutter interference simulation method needs to accurately model the radar system and the ground condition, but in most cases, the accurate modeling parameters of the radar system and the ground condition are difficult to obtain, so that the relevant ground clutter interference simulation calculation cannot be carried out.
Disclosure of Invention
Aiming at the problems, the invention provides an intelligent method for simulating clutter interference in an air battle environment and a ground, the system can effectively simulate the influence of the clutter interference on an airborne radar and a radar seeker by ground angle calculation and signal-to-clutter ratio calculation according to the states of a local machine and a target, the simulation result can be obtained by inputting a small amount of key radar parameters and terrain conditions, the calculation amount is small, and the simulation precision is high.
The technical scheme adopted by the invention is as follows: the intelligent method for simulating clutter interference in the air battle environment and the ground comprises a step of calculating the ground clearance angle and a step of calculating the signal-to-clutter ratio, and is characterized in that:
the calculation process of the step of calculating the ground rubbing angle comprises the following steps: the radar beam ground clearance angle psi can be obtained from the following formula according to the altitude h and the earth radius R of the local machine A0：
The calculation process of the signal-to-clutter ratio calculation step comprises the following steps: obtaining a grazing angle psi according to the positions of the local machine A and the target P, wherein the psi is an included angle between a connecting line of the local machine A and the target P and the ground; when psi is greater than psi0In time, the ground clutter has an influence on the radar detection capability of the local A, and the clutter area sigma can be obtained by the following formulac：
Wherein gamma is a clutter scattering parameter, and can be taken according to the terrain condition at a grounding point Q of a connecting line extension line of the local machine A and the target P; thetaBIs a radar horizontal beam width angle; rcThe distance from the local machine A to the grounding point Q; c is the speed of light; τ is the radar pulse width; when psi is less than psi0In the time, the radar wave beam emitted by the local A is not projected to the ground, the ground clutter has no influence on the radar detection capability of the local A, and the clutter area sigmacIs 0;
then the signal to clutter ratio KSCRComprises the following steps:
wherein σ is a real-time target RCS value; rrThe distance from the local A to the target P; when sigma iscWhen 0, KSCRIs + ∞; the electromagnetic simulation system in the intelligent air battle environment can pass through KSCRQuickly determines whether the local machine A can detect and track the target P under the condition of ground clutter interference.
The invention has the beneficial effects that: the influence of ground clutter interference on the detection capability of an airborne radar and a radar seeker can be effectively simulated; the most critical signal-to-noise ratio in ground clutter interference simulation can be accurately calculated only by a small amount of parameters such as the position of a local machine and a target, the horizontal beam width angle of a radar, the pulse width of the radar and the like; the ground clutter interference simulation algorithm adopted is small in calculation amount and is suitable for the intelligent air fighting environment which needs ground clutter interference simulation on a large number of airborne radars and radar seeker.
Drawings
FIG. 1 is a schematic view of a geometry psi;
FIG. 2 is θBA geometrical schematic.
Detailed Description
The invention is further described in the following description and examples, which are included to provide a further understanding of the invention and are not to be construed as limiting the invention in any way.
The embodiment of the intelligent air battle environment and ground clutter interference simulation method comprises a ground clearance angle calculation step and a signal-to-clutter ratio calculation step, and is characterized in that:
the calculation process of the step of calculating the ground rubbing angle comprises the following steps: the radar beam ground clearance angle psi can be obtained from the following formula according to the altitude h and the earth radius R of the local machine A0：
The calculation process of the signal-to-clutter ratio calculation step comprises the following steps: obtaining a grazing angle psi according to the positions of the local machine A and the target P, wherein the psi is an included angle between a connecting line of the local machine A and the target P and the ground; when psi is greater than psi0In time, the ground clutter has an influence on the radar detection capability of the local A, and the clutter area sigma can be obtained by the following formulac：
Wherein gamma is a clutter scattering parameter, the gamma can be taken according to the terrain condition at a grounding point Q of a connecting line extending line of the local machine A and a target P, the gamma value of a mountain land is 1, the gamma value of a sea surface under a 3-level sea condition is 0.0001, the gamma value of a plain is 0.01, and the gamma value of a city is 1; thetaBIs a radar horizontal beam width angle; rcThe distance from the local machine A to the grounding point Q; c is the speed of light; τ is the radar pulse width; when psi is less than psi0In the time, the radar wave beam emitted by the local A is not projected to the ground, the ground clutter has no influence on the radar detection capability of the local A, and the clutter area sigmacIs 0;
then the signal to clutter ratio KSCRComprises the following steps:
wherein σ is a real-time target RCS value; rrThe distance from the local A to the target P; when sigma iscWhen 0, KSCRIs + ∞; the electromagnetic simulation system in the intelligent air battle environment can pass through KSCRQuickly determines whether the local machine A can detect and track the target P under the condition of ground clutter interference.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (1)
1. The intelligent method for simulating clutter interference in the air battle environment and the ground comprises a step of calculating the ground clearance angle and a step of calculating the signal-to-clutter ratio, and is characterized in that:
the calculation process of the step of calculating the ground rubbing angle comprises the following steps: the radar beam ground clearance angle psi can be obtained from the following formula according to the altitude h and the earth radius R of the local machine A0：
The calculation process of the signal-to-clutter ratio calculation step comprises the following steps: obtaining a grazing angle psi according to the positions of the local machine A and the target P, wherein the psi is an included angle between a connecting line of the local machine A and the target P and the ground; when psi is greater than psi0In time, the ground clutter has an influence on the radar detection capability of the local A, and the clutter area sigma can be obtained by the following formulac：
Wherein gamma is a clutter scattering parameter, and can be taken according to the terrain condition at a grounding point Q of a connecting line extension line of the local machine A and the target P; thetaBAs radar waterA flat beam width angle; rcThe distance from the local machine A to the grounding point Q; c is the speed of light; τ is the radar pulse width; when psi is less than psi0In the time, the radar wave beam emitted by the local A is not projected to the ground, the ground clutter has no influence on the radar detection capability of the local A, and the clutter area sigmacIs 0;
then the signal to clutter ratio KSCRComprises the following steps:
wherein σ is a real-time target RCS value; rrThe distance from the local A to the target P; when sigma iscWhen 0, KSCRIs + ∞; the electromagnetic simulation system in the intelligent air battle environment can pass through KSCRQuickly determines whether the local machine A can detect and track the target P under the condition of ground clutter interference.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5483240A (en) * | 1994-09-28 | 1996-01-09 | Rockwell International Corporation | Radar terrain bounce jamming detection using ground clutter tracking |
| CN109061582A (en) * | 2018-06-15 | 2018-12-21 | 中国民航大学 | Airborne PD Radar high-fidelity based on DEM and DLCD anisotropically Clutter simulation method |
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2020
- 2020-09-04 CN CN202010923635.4A patent/CN112051554B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5483240A (en) * | 1994-09-28 | 1996-01-09 | Rockwell International Corporation | Radar terrain bounce jamming detection using ground clutter tracking |
| CN109061582A (en) * | 2018-06-15 | 2018-12-21 | 中国民航大学 | Airborne PD Radar high-fidelity based on DEM and DLCD anisotropically Clutter simulation method |
Non-Patent Citations (4)
| Title |
|---|
| 张森: "一种机载相控阵雷达的地杂波仿真方法", 《中国高新技术企业》, 31 May 2011 (2011-05-31), pages 27 - 28 * |
| 牛利民 等: "机载预警雷达杂波仿真与分析", 《雷达科学与技术》, vol. 11, no. 3, 30 June 2013 (2013-06-30), pages 236 - 240 * |
| 赵晓辉: "雷达探测性能仿真中的地杂波模型", 《无线电通信技术》, vol. 28, no. 1, 31 January 2002 (2002-01-31), pages 41 - 42 * |
| 阮锋 等: "一种简捷的机载PD雷达地杂波仿真方法", 《现代雷达》, vol. 28, no. 12, 31 December 2006 (2006-12-31), pages 30 - 32 * |
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