CN113341387A - Early warning machine detection capability analysis method based on key areas and storage medium - Google Patents
Early warning machine detection capability analysis method based on key areas and storage medium Download PDFInfo
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- CN113341387A CN113341387A CN202110898930.3A CN202110898930A CN113341387A CN 113341387 A CN113341387 A CN 113341387A CN 202110898930 A CN202110898930 A CN 202110898930A CN 113341387 A CN113341387 A CN 113341387A
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Abstract
The invention relates to the technical field of airborne radar detection, in particular to a method for analyzing the detection capability of an early warning machine based on a key area and a storage medium, wherein the key area is discretized, the detection capability of the airborne radar is represented by the detected times of each coordinate intersection point, and the detection times of the key area are summarized by one complete route period of the early warning machine; when the coordinate intersection point is in the detection range of the onboard radar and is not in the Doppler velocity blind area, the coordinate intersection point is considered to be detectable, the detection frequency is increased by 1, and otherwise, the detection frequency is 0. The method has the advantages that main factors influencing the detection capability of the early warning machine are analyzed, the definition of stable detection coverage and region blind speed probability is given, then simulation analysis is carried out on the detection capability of the important region aiming at a plurality of situations such as target speed direction adjustment, patrol position adjustment, two early warning machines cooperative detection and the like, the reasonability of the result of the route planning of the early warning machine can be reversely verified in the analysis process, and the method has practical guiding significance on the task planning of the early warning machine.
Description
Technical Field
The invention relates to the technical field of airborne radar detection, in particular to a method for analyzing the detection capability of an early warning machine based on a key area and a storage medium.
Background
With the complexity and the changeability of the battle situation and the environment, the acquisition of accurate information and clear battlefield situation becomes the key for winning the informatization war. The airborne early warning radar is used as an important means for early warning detection, can realize a plurality of functions such as target detection, air warning, target identification, command guidance and the like, and becomes the key point of the development of the field. Airborne early warning radar faces diversified tasks and complex detection environment, and generally requires that a single airborne early warning radar must cooperate with other airborne early warning radars or early warning detection equipment to perform information cooperation. At present, the prior art for developing the multi-machine cooperative detection capability around a point-shaped region is more, and the research on the detection capability of a heavy-point attack region is less. Due to the characteristics of the radar working system of the early warning machine, the detection performance of the early warning machine is greatly influenced by the relative radial velocity blind area. The early warning machine is usually faced with the problems of limited detection area, Doppler blind area and the like in the task execution process, how to plan the early warning machine air route, ensure the stable coverage of the detection task area, exert the maximum efficiency of the existing equipment, is a problem to be solved urgently in the research of the early warning machine detection related technology, and early warning detection on the important attack area of an enemy is one of the important tasks of the early warning machine.
Disclosure of Invention
The invention provides a method for analyzing the detection capability of an early warning machine based on a key area and a storage medium, which solve the technical problem that the early warning detection of the key attack area of an enemy is difficult.
The invention provides a method for analyzing the detection capability of an early warning machine based on a key area, which aims to solve the technical problems and comprises the following steps:
discretizing a key area, expressing the detection capability of the airborne radar by the detected times of each coordinate intersection point, and summarizing the detection times of the key area by one complete route period of the early warning machine; when the coordinate intersection point is in the detection range of the airborne radar and is not in the Doppler velocity blind area, the coordinate intersection point is considered to be detectable, the detection frequency is increased by 1, and otherwise, the detection frequency is 0;
when the target speed direction is fixed, respectively carrying out detection capability simulation analysis on a key area and a patrol area of the early warning machine when the key area and the patrol area of the early warning machine are centered and aligned, and a key area and the patrol area of the early warning machine are deviated and aligned;
when the patrol position is fixed, carrying out detection capability simulation analysis when the target speed direction and the opposite direction have an included angle;
under the condition that the two early warning machines detect cooperatively, the size and the position of a key area are unchanged, the speed and the direction of a target are unchanged, and the two early warning machines are subjected to detection capability simulation analysis when patrolling in a V shape with an included angle of 45 degrees with the opposite direction.
Optionally, the length of the focal region is 100km, the width of the focal region is 50km, the focal region is discretized, a 100-by-50 coordinate system grid is established to form 5000 subareas, and the detection capability of the airborne radar is represented by the number of times that each coordinate intersection point is detected.
Optionally, when the target speed direction is fixed, selecting a double 180-degree turning air route in the airspace for flying, wherein the length L of the air route is 150km, the radius r of the air route is 25km, and one period of the early warning aircraft on the air route is 400 stepping points.
Optionally, if the key area is centered and aligned with the patrol area of the early warning machine, the simulation analysis parameters are set as follows: the nearest distance between the early warning machine and the key area is 250km, the target is right below the target in the speed direction of 150m/s, and the minimum detectable speed is 30 m/s.
Optionally, the detection capability of the airborne radar of the early warning machine is cluttered with notches
The effect of (a), which is defined as:
in the formula (I), the compound is shown in the specification,
representing a state of motion at a moment in time, including a position component
And speed part
，
Is the known state of the sensor at the same time as the clutter notch
When the following formula is satisfied, the target is shielded by the doppler blind area:
in the formula
Is the minimum detectable speed.
Optionally, a region blind speed probability is set, and in a patrol period of the early warning machine, a ratio of the number of times of occurrence of the region blind speed in the discretization region to the total number of times is determined, that is:
in the formulamThe length of the region of interest is indicated,mwhich is the width of the region or regions,kthe number of steps of the early warning machine in one patrol period is shown.
Optionally, if the key area and the patrol area of the early warning machine deviate from the correct alignment, the simulation analysis parameters are set as follows: the size and the position of the key area are unchanged, the speed and the direction of the target are unchanged,MDVstill 30m/s, the early warning machine deviates 50km from the key area and is aligned in parallel.
Optionally, when the patrol position is fixed, the included angle between the target speed direction and the opposite direction is transited from-90 degrees to 90 degrees, discretization simulation analysis is performed by taking 10 degrees as stepping, and a change curve of the region blind speed probability and the speed included angle is obtained through calculation.
Optionally, in the case of cooperative detection of two early warning machines, the parameters of the simulation analysis are set as follows: the size and the position of the key area are unchanged, the speed and the direction of the target are unchanged,MDVand still 30m/s, performing cooperative detection by using two early warning machines, performing detection in a V shape in a 45-degree direction, performing detection capability simulation analysis when the vertical distance between the early warning machines and the key area is 250km, stepping a speed direction included angle from-90 degrees to 90 degrees by 10 degrees, and calculating to obtain a change curve of the area blind speed probability and the speed included angle.
The present invention also provides a storage medium for storing a computer program, the computer program comprising: instructions for performing a method for early warning engine detection capability analysis based on the key regions.
Has the advantages that: the invention provides an early warning machine detection capability analysis method and a storage medium based on key areas, wherein the key areas are discretized, the detection capability of an airborne radar is represented by the detected times of each coordinate intersection point, and the detection times of the key areas are summarized by one complete route period of the early warning machine; when the coordinate intersection point is in the detection range of the onboard radar and is not in the Doppler velocity blind area, the coordinate intersection point is considered to be detectable, the detection frequency is increased by 1, and otherwise, the detection frequency is 0. The method has the advantages that main factors influencing the detection capability of the early warning machine are analyzed, the definition of stable detection coverage and region blind speed probability is given, then simulation analysis is carried out on the detection capability of the important region aiming at a plurality of situations such as target speed direction adjustment, patrol position adjustment, two early warning machines cooperative detection and the like, the reasonability of the result of the route planning of the early warning machine can be reversely verified in the analysis process, and the method has practical guiding significance on the task planning of the early warning machine.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic flow chart of an early warning machine detection capability analysis method based on a key area according to the present invention;
FIG. 2 is a V-shaped collaborative detection model diagram of two early warning machines of the early warning machine detection capability analysis method based on the key area;
FIG. 3 is a graph of the region blind velocity probability variation of the model simulation analysis of FIG. 2;
FIG. 4 is a schematic diagram of a situation model with an azimuth angle of a target speed according to the method for analyzing the detection capability of the early warning device in the key area;
FIG. 5 is a graph of the region blind velocity probability variation of the model simulation analysis of FIG. 4;
FIG. 6 is a schematic diagram of a double parallel lines of an early warning machine based on the method for analyzing the detection capability of the early warning machine in the key area;
FIG. 7 is a schematic diagram of the pre-warning aircraft after rotation and translation of the pre-warning aircraft route based on the analysis method of the detection capability of the pre-warning aircraft in the key area;
FIG. 8 is a schematic diagram of a centering alignment area of the method for analyzing the detection capability of the early warning device based on the key area;
fig. 9 is a schematic diagram of a dead zone deviating from 50km according to the method for analyzing the detection capability of the early warning device based on the key zone.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 5, the present invention provides a method for analyzing detection capability of an early warning device based on a key area, including:
discretizing a key area, expressing the detection capability of the airborne radar by the detected times of each coordinate intersection point, and summarizing the detection times of the key area by one complete route period of the early warning machine; when the coordinate intersection point is in the detection range of the airborne radar and is not in the Doppler velocity blind area, the coordinate intersection point is considered to be detectable, the detection frequency is increased by 1, and otherwise, the detection frequency is 0;
when the target speed direction is fixed, respectively carrying out detection capability simulation analysis on a key area and a patrol area of the early warning machine when the key area and the patrol area of the early warning machine are centered and aligned, and a key area and the patrol area of the early warning machine are deviated and aligned;
when the patrol position is fixed, carrying out detection capability simulation analysis when the target speed direction and the opposite direction have an included angle;
under the condition that the two early warning machines detect cooperatively, the size and the position of a key area are unchanged, the speed and the direction of a target are unchanged, and detection capability simulation analysis is carried out when the two early warning machines detect in a V shape with an included angle of 45 degrees with the opposite direction.
In the process of battle simulation analysis, when only the attack direction of an enemy is known and the target position, the speed direction, the attack time and the like of the enemy are unknown, an early warning machine is needed to comprehensively detect the key attack direction of the enemy. Due to the characteristics of the radar working system of the early warning machine, the detection performance of the early warning machine is greatly influenced by the relative radial velocity blind area. The detection capability of the heavy spot area is subjected to simulation analysis on a plurality of situations such as target speed direction adjustment, patrol position adjustment, cooperative detection of two early warning machines and the like, the detection capability under different situations is subjected to comparative analysis on the basis of index parameters, and the analysis method has guiding significance on task planning of the early warning machines.
The method comprises the steps of firstly analyzing main factors influencing the detection capability of the early warning machine, giving out definitions of stable detection coverage and region blind speed probability, explaining mathematical representation of a typical early warning machine flight path, carrying out simulation analysis on the detection capability of a heavy spot region according to a plurality of situations such as target speed direction adjustment, patrol position adjustment, two early warning machines cooperative detection and the like, carrying out comparative analysis on the detection capability under different situations based on index parameters, reversely verifying the reasonability of the result of the flight path planning of the early warning machine in the analysis process, and having guiding significance on the task planning of the early warning machine.
1. Single platform airborne radar detection range:
(1) basic radar equation
The basic radar equation relates radar range to factors such as radar transmission, reception, antenna, and environment. The formula is as follows:
in the formula:P t transmitting power for radar;
is the radar cross section;
is the effective receiving area of the antenna;Gis the antenna gain;S min is the smallest detectable signal. As can be seen from the formula (1), the radar detects the distanceProportional to the power of the radar transmission, the radar cross-sectional area, the effective receiving area of the antenna, the fourth power of the antenna gain, and inversely proportional to the fourth power of the minimum detectable signal.
(2) Search radar equation
When the airborne radar searches for a target, the target needs to be found by scanning the antenna frame by frame within a certain solid angle range, so that the detection distance can be increased by a radar searching equation, and the formula is as follows:
in the formula:P av a medium average transmit power;t s scan time (frame time) for search;A r is the effective receiving area of the antenna;
is a target radar scattering cross section;
search sector solid angle (radians);kis the Botzmann constant;T 0 is at standard room temperature;D 0 is a detection factor;L s the dissipation factor is searched for due to various factors. As can be seen from equation (2), increasing the radar detection range can also be done by increasing the search scan time and decreasing the search sector.
(3) Radar line-of-sight formula
Influenced by the curvature of the earth surface, the maximum direct-view distance of a target which can be found by a radar depends on the erection height of a radar antenna and the height of the target, and the radar sight distance formula is as follows:
in the formula:h 1 is the radar erection height;h 2 is an objectHeight. The airborne radar usually works at a height of about 10km, the maximum distance limiting the downward view of the airborne radar is the radar visual range which is about 400km, the maximum detection distance of the airborne radar is not only related to various parameters of the radar, but also limited by the radar reflection sectional area of a target and the environment where the target is located during detection, therefore, the actual detection distance of the airborne radar has a certain fluctuation range and is a result influenced by various factors such as radar parameters, target characteristics and environment, and the maximum detection distance of the early warning machine is 370km in the embodiment of the invention.
2. The problem of shielding of Doppler blind areas of early warning machines is as follows:
in order to solve the problem of strong ground/sea clutter in downward sight, the airborne radar adopts a pulse Doppler system and utilizes the Doppler effect generated by a moving target to realize target detection. However, since the airborne radar is moving, which results in doppler spread of clutter in the radar, the occlusion effect of the mainlobe clutter is severe, and in addition, airborne radar generally filters out clutter by setting a minimum doppler velocity threshold, which is also called a velocity blind area. For airborne radar of early warning machine, the detection capability of the airborne radar is seriously influenced by clutter notch
The effect of (a), which is defined as:
in the formula (I), the compound is shown in the specification,
representing a state of motion at a moment in time, including a position component
And speed part
，
Is the known state of the sensor at the same time as the clutter notch
When the following formula is satisfied, the target is shielded by the doppler blind area:
in the formula
Is the minimum detectable speed.
In order to quantitatively analyze the detection capability of a certain region, an index of the region blind speed probability is set in the text. The probability of the blind speed of the region can be defined as the ratio of the number of times of the blind speed of the region appearing in the discretization region to the total number of times in a patrol period of the early warning machine, namely:
in the formulamThe length of the region of interest is indicated,nwhich is the width of the region or regions,kthe number of steps of the early warning machine in one patrol period is shown. By analyzing the detection capability of the airborne radar to the area of attack, the detection capability of the area needs to be quantitatively analyzed. The airborne radar adopts a pulse Doppler system, the target detection is realized by using the Doppler effect generated by a moving target, and if the Doppler speed of the target is too low (speed blind area), the target can not be detected. The early warning machine is usually patrolled in a planned array position, and the regional blind speed probability is defined as the ratio of the blind speed times appearing in a discretization region to the total detection times in one patrol period of the early warning machine to measure the detection capability of the radar of the early warning machine.
The following is a derived definition of a mathematical representation of an early warning aircraft (i.e., radar) flight path.
3. Double parallel lines of the early warning machine:
as shown in FIG. 6, assuming that the early warning aircraft starts flying from point A of the double parallel routes, the position of the early warning aircraft is represented
Can be expressed as a function of time t as follows:
(1) if it is not
(2) If it is not
(3) If it is not
(4) If it is not
The planned early warning airplane route can be regarded as a result of rotating on the basis of the original route and then translating, and the rotation angle is made to be
In the course of a flightThe coordinates after the translation of the heart O point are
As shown in fig. 7, therefore, the planned early warning machine position coordinates
Comprises the following steps:
4. simulation analysis:
in the simulation analysis, the detection capability simulation analysis is carried out on different situations such as the relative position of the early warning machine and a key area, the target speed direction change in the key area, the cooperative detection of multiple early warning machines and the like. Suppose that the direction of possible attack by an enemy forms a rectangular area, namely a key area needing to be detected, and the length is 100km and the width is 50 km.
(one) the target speed direction is fixed.
When the airborne radar on the early warning machine actually works, the patrol course is usually simpler, a double 180-degree turning route is selected to fly in the airspace, the length L is 150km, the radius r is 25km, and 400 stepping points are arranged on the route of the early warning machine in one period.
(1) And centering the key area with a patrol area of the early warning machine.
The parameters of the early warning machine are set as follows: the nearest distance between the early warning machine and the key area is 250km, and a schematic diagram of the centered and opposite time area is shown in fig. 8. The target is directly below at a speed of 150m/s, and the minimum detectable speedMDVIs 30 m/s.
In order to quantitatively analyze the detection capability of the important region, the important region is discretized, a 100 x 50 coordinate system grid, namely 5000 subregions, is established, the detection capability of the airborne radar is represented by the number of times each coordinate intersection point is detected, when the coordinate intersection point is in the detection range of the airborne radar and is not in the Doppler velocity blind zone, the coordinate intersection point is considered to be detectable, the detection number is increased by 1, and the other way is increased by 0. The detection result is represented by different colors in the simulation analysis result, and the darker the color, the more times the sub-area is detected. When the early warning machine analyzes the detection capability of the area, the early warning machine summarizes a complete route period.
Simulation analysis shows that the notch of the Doppler blind area is 0, because the velocity direction is just downward, and in this case, each sub-area has no Doppler blind area. The detection performance is also symmetrical because the flight path is just opposite to the key area, and the weakening of the detection capability of the edges on two sides is caused by the limitation of the maximum detection distance.
(2) The key area is deviated from and right opposite to the patrol area of the early warning machine. As shown in fig. 9.
The simulation analysis parameters are set as follows: the size and the position of the key area are unchanged, the speed and the direction of the target are unchanged,MDVstill 30 m/s. The early warning machine is parallel and opposite to the key area deviating from 50 km.
The simulation analysis shows that the simulation analysis result of the notch of the Doppler blind area is given by the simulation analysis result of the detection capability of the key area. When the deviation distance is not too large, the influence of the Doppler blind area is small, and the Doppler blind area of each subarea is 0. In this case, the detection capability of the key area is mainly influenced by the detection distance. And the upper left corner part is far away from the relative position, so that the detected times are obviously less, and the color difference is obviously changed step by step.
Compared with the two situations (1) and (2), the method can be intuitively obtained, and if the early warning airplane route area is over against the major area, the detection capability is obviously better.
(II) the case that the patrol position is fixed: the parameters of the simulation analysis are set as follows: based on the scene in FIG. 9, the target speed is no longer directly downward, but has an included azimuth angle
As shown in fig. 4. Suppose the target speed is shifted 45 degrees to the left, i.e.
If the angle is not less than 45 degrees, carrying out detection capability simulation analysis, and observing that Doppler blind areas easily occur in the lower left side area, and obtaining the blind speed probability of the area at the moment according to a formula (6)P=0.073。
Further, discretization simulation analysis is performed on the included angle of the speed direction from-90 degrees to 90 degrees by taking 10 degrees as steps, and a change curve of the regional blind speed probability and the included angle of the speed is obtained and is shown in fig. 5.
And thirdly, the two early warning machines detect cooperatively.
The parameters of the simulation analysis are set as follows: the size and the position of the key area are unchanged, the speed and the direction of the target are unchanged,MDVstill 30 m/s. Now, two early warning machines are used for cooperative detection, the detection is carried out in a V shape in the direction of 45 degrees, and the vertical distance between the early warning machines and a key area is 250km, as shown in figure 2.
The speed direction included angle is stepped from-90 degrees to 90 degrees by 10 degrees, the change curve of the region blind speed probability and the speed included angle is obtained and is shown as a red circle in fig. 3, when two early warning machines detect synergistically, the region blind speed probability is obviously reduced under the influence of the speed, and the collaborative detection capability is greatly improved.
The beneficial effect of this application: the early warning machine is usually faced with the problems of limited detection area, Doppler blind area and the like in the task execution process, how to plan the early warning machine air route, ensure the stable coverage of the detection task area, exert the maximum efficiency of the existing equipment, is a problem to be solved urgently in the research of the early warning machine detection related technology, and early warning detection on the important attack area of an enemy is one of the important tasks of the early warning machine. The method comprises the steps of firstly analyzing main factors influencing the detection capability of the early warning machine, giving definitions of a stable detection coverage area and a region blind speed probability, and then carrying out simulation analysis on the detection capability of a counterweight region aiming at a plurality of situations such as target speed direction adjustment, patrol position adjustment, two early warning machines cooperative detection and the like, wherein the analysis process can reversely verify the reasonability of the result of the route planning of the early warning machine, and the method has practical guiding significance on the task planning of the early warning machine.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A method for analyzing the detection capability of an early warning machine based on a key area is characterized by comprising the following steps:
discretizing a key area, expressing the detection capability of the airborne radar by the detected times of each coordinate intersection point, and summarizing the detection times of the key area by one complete route period of the early warning machine; when the coordinate intersection point is in the detection range of the airborne radar and is not in the Doppler velocity blind area, the coordinate intersection point is considered to be detectable, the detection frequency is increased by 1, and otherwise, the detection frequency is 0;
when the target speed direction is fixed, respectively carrying out detection capability simulation analysis on a key area and a patrol area of the early warning machine when the key area and the patrol area of the early warning machine are centered and aligned, and a key area and the patrol area of the early warning machine are deviated and aligned;
when the patrol position is fixed, carrying out detection capability simulation analysis when the target speed direction and the opposite direction have an included angle;
under the condition that the two early warning machines detect cooperatively, the size and the position of a key area are unchanged, the speed and the direction of a target are unchanged, and the two early warning machines are subjected to detection capability simulation analysis when patrolling in a V shape with an included angle of 45 degrees with the opposite direction.
2. The method as claimed in claim 1, wherein the length of the region of interest is 100km and the width of the region of interest is 50km, the region of interest is discretized, a 100-by-50 coordinate system grid is established to form 5000 sub-regions, and the number of times each coordinate intersection is detected represents the detection capability of the airborne radar.
3. The method for analyzing the detection capability of the early warning machine based on the key areas as claimed in claim 2, wherein when the target speed direction is fixed, a double 180-degree turning air route is selected to fly in the air, the length L of the air route is 150km, the radius r of the air route is 25km, and one period of the early warning machine on the air route is 400 stepping points.
4. The method for analyzing the detection capability of the early warning machine based on the key area according to claim 3, wherein if the key area and the patrol area of the early warning machine are centered and aligned, the simulation analysis parameters are set as follows: the nearest distance between the early warning machine and the key area is 250km, the target is right below the target in the speed direction of 150m/s, and the minimum detectable speed is 30 m/s.
5. The method according to claim 3 or 4, wherein the notch is a notch in which the detection capability of the airborne radar of the warning device is cluttered
The effect of (a), which is defined as:
in the formula (I), the compound is shown in the specification,
representing a state of motion at a moment in time, including a position component
And speed part
，
Is the known state of the sensor at the same time as the clutter notch
When the following formula is satisfied, the target is shielded by the doppler blind area:
in the formula
Is the minimum detectable speed.
6. The method for analyzing the detection capability of the early warning machine based on the key area according to claim 5, wherein the probability of the blind speed of the area is set as the ratio of the number of times of the blind speed of the area appearing in the discretization area to the total number of times in a patrol period of the early warning machine, namely:
in the formulamThe length of the region of interest is indicated,nwhich is the width of the region or regions,kthe number of steps of the early warning machine in one patrol period is shown.
7. Region of interest based according to claim 5The method for analyzing the detection capability of the early warning machine is characterized in that if a key area and a patrol area of the early warning machine deviate from a correct time setting, simulation analysis parameters are set as follows: the size and the position of the key area are unchanged, the speed and the direction of the target are unchanged,
still 30m/s, the early warning machine deviates 50km from the key area and is aligned in parallel.
8. The method for analyzing the detection capability of the early warning machine based on the key area according to claim 6, wherein when the patrol position is fixed, the included angle between the target speed direction and the opposite direction is transited from-90 degrees to 90 degrees, discretization simulation analysis is performed by taking 10 degrees as stepping, and a change curve of the area blind speed probability and the speed included angle is obtained through calculation.
9. The method for analyzing the detection capability of the early warning machine based on the key area as claimed in claim 6, wherein in the case of cooperative detection of two early warning machines, the parameters of simulation analysis are set as follows: the size and the position of the key area are unchanged, the speed and the direction of the target are unchanged,MDVand still 30m/s, performing cooperative detection by using two early warning machines, performing detection in a V shape in a 45-degree direction, performing detection capability simulation analysis when the vertical distance between the early warning machines and the key area is 250km, stepping a speed direction included angle from-90 degrees to 90 degrees by 10 degrees, and calculating to obtain a change curve of the area blind speed probability and the speed included angle.
10. A storage medium, characterized by: the storage medium is for storing a computer program, the computer program comprising: instructions for performing the area-of-interest based forewarning engine detectability analysis method of any of claims 1 to 9.
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