Multi-projectile arrangement method for phased array radar

Abstract

The present invention relates to a phased array radar multi-projectile arrangement method, including: establishing a search range to an enemy area, searching and tracking enemy targets; establishing a target motion model according to target motion trajectory parameters; solving the relative relationship between itself and the target position, and determining the launch parameters of each projectile; the phased array radar reasonably allocates time, space, frequency, energy and other resources, and continuously tracks and measures multiple projectiles; the phased array radar tracks and measures each correction projectile, calculates the deviation of the intersection point between the projectile and the target, and solves the control parameters of the projectile according to the direction and size of the deviation; the communication device sends the control command to the projectile, and the correction actuator of the projectile interprets the command and corrects the flight attitude of the projectile. The present invention tracks and measures multiple projectiles and corrects the deviation between their landing point and the strike target, improves the hit rate of the projectile, and adaptively adjusts the arrangement of the projectile launch according to the batch and landing point of the launched projectile, which can improve the strike efficiency and fault tolerance.

Description

Technical Field

[0001] The present invention relates to the field of phased array radar, and in particular to a method for arranging multiple projectiles of a phased array radar. Background Art

[0002] Traditional mechanical scanning radar only continuously tracks and measures a projectile target. In actual combat scenarios where resources are extremely precious, it is bound to cause ineffective occupation and waste of resources. Figure 1 Phased array radar can reasonably allocate resources such as time, space, frequency, and energy, can quickly realize beam scanning and tracking in different directions, and realize continuous tracking and measurement of multiple targets. Therefore, it can be applied to the tracking, measurement, and correction of multiple projectiles to increase the probability of projectiles hitting the target, such as Figure 2 shown.

[0003] When the phased array radar searches and tracks the enemy target, the artillery system calculates the relative relationship between the target and its own position, and continuously fires multiple correction missiles at the enemy target. Taking the one-dimensional ballistic correction missile as an example, the phased array radar tracks and measures each correction missile, calculates the deviation between the intersection point of the projectile and the target, and sends a control command to the correction missile according to the direction and size of the deviation. After the projectile receives and interprets the command, its correction actuator responds to the command to realize the correction of the flight trajectory and increase the probability of the projectile hitting the target.

[0004] For a one-dimensional trajectory correction projectile, it can only correct the distance dimension. Once the projectile deviates in the azimuth dimension, even if the projectile is corrected in the distance dimension, it cannot accurately hit the enemy target. The general solution is to calculate the deviation and re-fire the projectile based on the landing point of the projectile deviating from the target. However, the newly fired one-dimensional trajectory correction projectile may still deviate from the target in the azimuth dimension, resulting in a failure to hit the target and a missed opportunity. In a rapidly changing battlefield, it may cause immeasurable losses and lead to the defeat of the battle. Summary of the invention

[0005] In order to solve the existing technical problems, the present invention provides a method for arranging multiple projectiles of a phased array radar.

[0006] The specific content of the present invention is as follows: A method for arranging multiple projectiles of a phased array radar comprises the following steps:

[0007] Step 1: Establish a search range towards the enemy area, search for and track enemy targets;

[0008] Step 2: Establish a target motion model based on the target motion trajectory parameters;

[0009] Step 3: The artillery system calculates the relative relationship between itself and the target position and determines the launch parameters of each projectile;

[0010] Step 4: The phased array radar rationally allocates resources such as time, space, frequency, and energy to continuously track and measure multiple projectiles;

[0011] Step 5: The phased array radar tracks and measures each correction projectile, calculates the deviation between the projectile and the target intersection point, and solves the control parameters of the projectile based on the direction and size of the deviation;

[0012] Step 6: The communication device sends the control command to the projectile, and the projectile's correction actuator interprets the command and corrects the projectile's flight attitude.

[0013] Furthermore, the method further includes: Step 7: when the last batch of projectiles fails to hit the enemy target or performs a second strike, the firing parameters of the projectiles are recalculated according to the trajectory and landing point of the last batch of projectiles, and the artillery system fires the next batch of projectiles at the target;

[0014] Step 8: Repeat the above steps until all enemy targets are destroyed.

[0015] Furthermore, in step three, determining the launch parameters of each projectile includes: first determining the optimal arrangement number n1 of the projectile azimuth dimension and the arrangement number n2 of the distance dimension, and the dispersion distance r of the projectiles in the azimuth dimension; determining the coverage range of the same batch of projectiles to maximize the probability of the first batch of projectiles hitting the target, and at least one projectile can cover the target; solving various launch parameters of the projectile and launching the first batch of projectiles to the target.

[0016] Furthermore, when the shape of the projectile hitting the target is made to be square, the probability of hitting the target is maximized.

[0017] Furthermore, assuming that the target is at position (0,0), the deviation (x,y) between the correctable landing area of ​​a single projectile and the target center follows a Gaussian distribution, and is independently and identically distributed in the azimuth dimension x and the distance dimension y σ x =σ y ,so

[0018]

[0019] The probability of a single corrected missile hitting the target is

[0020]

[0021] It is known that x1 is the killing radius of a single bullet in the azimuth dimension, y1 is the maximum correctable radius in the distance dimension, and the target falling in the area of ​​(-x1, x1), (-y1, y1) can be hit;

[0022] Assume that there are n correction missiles in total, n1 missiles are arranged in the azimuth dimension, and n2 missiles are arranged in the distance dimension, so that the probability of hitting the target is maximized, that is

[0023]

[0024] st

[0025] n=n1·n2

[0026] n1≥1

[0027] n2≥1

[0028] When n1·x1=n2·y1, the probability of hitting the target is the highest.

[0029] The phased array radar multi-projectile arrangement method of the present invention tracks, measures and corrects the deviation between the landing point and the strike target of multiple projectiles, improves the hit rate of the projectiles, and adaptively adjusts the arrangement of the projectile launch according to the batches and landing points of the launched projectiles, so that the first batch of projectiles can cover the target as much as possible, and the second batch of projectiles can cover as many targets as possible, thereby improving the strike efficiency and fault tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The specific implementation of the present invention will be further explained below in conjunction with the accompanying drawings.

[0031] Figure 1 This is a schematic diagram of single-projectile target tracking measurement for mechanical scanning radar;

[0032] Figure 2 This is a schematic diagram of multi-projectile target tracking measurement by phased array radar;

[0033] Figure 3 It is a flow chart of the phased array radar multi-projectile arrangement method of the present invention;

[0034] Figure 4 This is a schematic diagram of the adaptive projectile arrangement;

[0035] Figure 5 The following is a comparison chart of the hit probability of different arrangement strategies. DETAILED DESCRIPTION

[0036] The present invention discloses a method for arranging multiple projectile targets of a phased array radar, such as Figure 3 As shown, the following steps are included:

[0037] Step 1: Establish a search range towards the enemy area, search for and track enemy targets.

[0038] Step 2: According to the target motion trajectory parameters, establish the target motion model to prepare for the artillery system to launch a one-dimensional ballistic correction projectile.

[0039] Step 3: The artillery system calculates the relative relationship between itself and the target position and determines the launch parameters of each projectile.

[0040] First, determine the optimal arrangement number n1 of the projectile azimuth dimension and the arrangement number n2 of the distance dimension, and the projectile dispersion distance r in the azimuth dimension.

[0041] Determine the coverage area Area of ​​the same batch of projectiles so that the probability of the first batch of projectiles hitting the target is maximized and at least one projectile can cover the target.

[0042] Calculate the various launch parameters of the projectile and launch the first batch of projectiles at the target.

[0043] Step 4: The phased array radar rationally allocates time, space, frequency, energy and other resources to continuously track and measure multiple projectiles.

[0044] Step 5: The phased array radar tracks and measures each correction missile and calculates the deviation between the intersection point of the projectile and the target. If the deviation is less than the threshold, it approaches and hits the target. Otherwise, the control parameters of the projectile are calculated based on the direction and size of the deviation.

[0045] Step 6: The communication device sends the control command to the projectile, and the projectile's correction actuator interprets the command and corrects the projectile's flight attitude.

[0046] Step 7: When the previous batch of projectiles fails to hit the enemy target or executes a second strike, the launch parameters of the projectiles are recalculated based on the trajectory and landing point of the previous batch of projectiles, and the artillery system launches the next batch of projectiles at the target.

[0047] Re-determine the optimal arrangement number n1 of the projectile azimuth dimension and the arrangement number n2 of the distance dimension, and the projectile dispersion distance r in the azimuth dimension.

[0048] Determine the coverage area Area of ​​the azimuth dimension of the same batch of projectiles so that more projectiles can hit the target.

[0049] Solve the various launch parameters of the projectile and launch the next batch of projectiles to the target.

[0050] Step 9: Repeat the above steps until all enemy targets are destroyed.

[0051] When firing the first batch of projectiles, Figure 4(a) Since there is no prior knowledge of ballistic meteorological errors, the landing point of the first batch of projectiles may have an overall offset from the target in the azimuth and distance dimensions. Therefore, when launching the first batch of projectiles, the arrangement and launch parameters of the projectiles are adaptively adjusted. According to the movement direction of the target, the number of projectile arrangements n1 in the azimuth dimension and the number of projectile arrangements n2 in the distance dimension are determined, and the azimuth dimension projectile dispersion distance r (determined according to the azimuth dimension distance and n1) is used to expand the coverage of the same batch of projectiles. Compared with the traditional "all-or-nothing" type of projectiles in the same batch that use unified launch parameters, the projectiles can cover the target as much as possible.

[0052] When firing non-first batch projectiles, Figure 4 (b) Since we can obtain prior knowledge about the landing point deviation and ballistic meteorological error of the previous batch of projectiles, the hit rate of the corrected projectiles will be improved. Therefore, it is necessary to adjust the arrangement and launch parameters of the launched projectiles to reduce the coverage range of the same batch of projectiles so that more projectiles can cover the target.

[0053] Assume that the deviation (x, y) between the center of the projectile's correctable landing area and the target center obeys a Gaussian distribution and is independently and identically distributed in the azimuth dimension x and the distance dimension y. Assume that σ x =σ y .

[0054]

[0055] The probability of a single corrected missile hitting the target can be expressed as

[0056]

[0057] Among them, x1 is the killing radius of a single correction projectile in the azimuth dimension, and y1 is the maximum correctable radius of a single correction projectile in the distance dimension;

[0058] Ignoring the folded part of the projectile in the azimuth dimension and the distance dimension, when launching the first batch of projectiles, the probability of hitting the target with n1·n2 one-dimensional extended-range corrected projectiles arranged with the maximum coverage area is

[0059]

[0060] It is known that x1 is the killing radius of a single bullet in the azimuth dimension, y1 is the maximum correctable radius in the distance dimension, and the target falling in the area of ​​(-x1, x1), (-y1, y1) can be hit;

[0061] Assume that there are n correction missiles in total, n1 missiles are arranged in the azimuth dimension, and n2 missiles are arranged in the distance dimension, so that the probability of hitting the target is maximized, that is

[0062]

[0063] st

[0064] n=n1·n2

[0065] n1≥1

[0066] n2≥1

[0067] When n1·x1=n2·y1, that is, when the projectile covers a square area, the probability of hitting the target is the highest.

[0068] The probability of hitting the target by using the traditional method with n1·n2 corrected missiles that are not arranged is P1. The simulation results are as follows: Figure 5 As shown in (n1·n2=10). Taking the probability of a single one-dimensional extended-range corrected projectile hitting the target as 0.1 as an example, the corresponding strategies for the probability of multiple projectiles hitting the target from small to large are no arrangement strategy, n1=2, n2=5, n1=10, n2=1, n1=5, n2=2. When a suitable projectile arrangement method is selected, the probability of the projectile hitting the target can be greatly increased. Analysis and verification show that when the arrangement coverage area of ​​the projectile tends to be square, the probability of hitting the target can reach the optimal level.

[0069] The phased array radar multi-projectile arrangement method proposed in the present invention tracks, measures and corrects the deviation between the landing point and the target of the attack on multiple projectiles, improves the hit rate of the projectiles, and adaptively adjusts the arrangement of the projectile launch according to the batch and landing point of the launched projectiles, so that the first batch of projectiles can cover the target as much as possible. When the projectiles are attacked again, the arrangement of the launched projectiles is adjusted according to the prior information of the landing point of the previous batch of projectiles, so that as many projectiles as possible can cover the target, thereby improving the strike efficiency and fault tolerance. Compared with the traditional mechanical scanning radar single projectile target measurement and correction method, it can measure and correct multiple projectiles without increasing the total search and tracking time, and implement repressive strikes on enemy targets, which is more suitable for modern combat scenarios. Compared with the phased array radar that does not consider the projectile arrangement method, it can ensure that each batch of projectiles covers the target as much as possible, and more projectiles can cover the target when it is attacked again.

[0070] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A phased array radar multi-projectile arrangement method, characterized in that: The steps include: Step 1: Establish a search range towards the enemy area, search for and track enemy targets; Step 2: Establish a target motion model based on the target motion trajectory parameters; Step 3: The artillery system calculates the relative relationship between itself and the target position and determines the launch parameters of each projectile; Step 4: The phased array radar rationally allocates resources such as time, space, frequency, and energy to continuously track and measure multiple projectiles; Step 5: The phased array radar tracks and measures each correction projectile, calculates the deviation between the projectile and the target intersection point, and solves the control parameters of the projectile based on the direction and size of the deviation; Step 6: The communication device sends the control command to the projectile, and the projectile's correction actuator interprets the command and corrects the projectile's flight attitude; In step 3, determining the launch parameters of each projectile includes: first determining the optimal arrangement number n1 of the projectile azimuth dimension and the arrangement number n2 of the distance dimension, and the dispersion distance r of the projectile in the azimuth dimension; determining the coverage range of the same batch of projectiles, so that the probability of the first batch of projectiles hitting the target is maximized, and at least one projectile can cover the target; solving various launch parameters of the projectile and launching the first batch of projectiles to the target; when the projectiles hit the target in a square shape, the probability of hitting the target is maximized; Assuming the target is at (0,0), the deviation (x,y) between the correctable landing area of ​​a single projectile and the target center follows a Gaussian distribution and is independent and identically distributed in the azimuth dimension x and the distance dimension y. ,so ， The probability of a single corrected missile hitting the target is ， It is known that x1 is the killing radius of a single bullet in the azimuth dimension, and y1 is the maximum correctable radius in the distance dimension, which falls at (-x1, x1), (- y 1 ,y 1 ) area targets can be hit; Assume that there are n correction missiles in total, n1 missiles are arranged in the azimuth dimension, and n2 missiles are arranged in the distance dimension, so that the probability of hitting the target is maximized, that is ， when The probability of hitting the target is greatest when .

2. The phased array radar multi-projectile arrangement method according to claim 1, characterized in that: Also includes: Step 7: When the last batch of projectiles fails to hit the enemy target or executes a second strike, the launch parameters of the projectiles are recalculated according to the trajectory and landing point of the last batch of projectiles, and the artillery system launches the next batch of projectiles at the target; Step 8: Repeat the above steps until all enemy targets are destroyed.

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