Method and system for evaluating damage of space-time sequence fragment group to target
By equivalently scattered areas of the fragment group after the projectile explosion into a cube space, a continuous multi-layer fragment group model was established, combined with the intersection criteria and the damage probability model, the problem of target damage assessment in the intersection damage test of the bullet-earth junction is solved, and the accurate assessment of air target damage is achieved.
Patent Information
- Application Number
- CN202311855796.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-07-22
AI Technical Summary
In the damage test of the junction of the ammunition and interception, it is difficult to accurately evaluate the target damage information, especially the damage efficiency of the near-explosion of the space air defense interceptor projectiles on the target. The existing methods rely on uncertain power of the fragment group and the target damage factor, which makes the assessment difficult.
The fragment group scattered area formed after the projectile fuse explosion is equivalent to the cube space, and a continuous multi-layer fragment group model is established by using the finite element division method of time and space. Based on the relationship between the fragment firing trajectory and the cross-section slope of the target, the intersection criterion is established, and the damage probability model and cloud model are combined to calculate the damage probability of the fragment group to the target.
An objective and accurate assessment of the target damage effect in the junction damage test of the scattered target is achieved, reducing the dependence on known parameters, and the damage to the air targets by randomly spreading the fragment field is able to be evaluated.
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Figure CN120354641A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of military testing, and relates to a method and system for evaluating the damage of a time-space sequence fragment group to a target. Background Art
[0002] In the damage test of the projectile-target intersection in air defense interception, it is very difficult to obtain accurate target damage information in the actual spatial projectile-target intersection penetration damage. These information can be mathematically expressed as uncertain, incomplete or fuzzy decision-making information. Coupled with the uncertain laws of the vulnerability elements of the target itself, it is more difficult to establish a scientific target damage evaluation model and evaluation system. Especially for the damage effectiveness of the proximity fuse of the projectile in air defense interception, it more often shows the damage caused by the power of very few fragments under the action of proximity explosion in a certain space. It depends on the combined factors such as the power posture of the fragment group during intersection, the target's own damage factors, damage weights, damage levels, etc., which increases the difficulty of evaluating the damage effect of the target by the damage system. In order to intuitively observe the damage effect of the fragment field generated by the projectile proximity explosion on the target and scientifically and effectively evaluate the damage effect of the target, it is necessary to establish a calculation model for the correlation between the spatial distribution position of the multi-layer fragment group and the target damage.
[0003] The research on the evaluation of the target damage effect mainly focuses on two aspects: the known and determined fragment damage element information and the target vulnerability. By improving the accuracy of fragment parameter testing, enhancing the accuracy of measuring the damaged area of the target, and improving the hit accuracy and other measures to improve the accuracy of target damage evaluation. The research on the damage effectiveness of the fragment field distribution on the target mainly focuses on the damage effectiveness evaluation in a certain area range or in a specific environment under fixed distance and fixed explosion; most of these methods for calculating the target damage are based on the relevant parameters of the known fragments. However, the distribution of the fragment field generated by the projectile explosion is random and uncertain. And at the moment of the projectile explosion, a fragment field similar to a conical cover is generated, and the spatial positions of the fragments are different. Therefore, even for the same type of projectile, the damage effect of the power field formed by the fragment group after each projectile explosion on the target is also different. It is necessary to be able to reproduce the process of gradually damaging the target under the attack of the fragment group to objectively and accurately evaluate the target damage effect in the projectile-target intersection damage test. Summary of the Invention
[0004] The purpose of the present invention is to provide a method for evaluating the damage of a time-space sequence fragment group to a target, as a means for accurately evaluating the damage effectiveness after the proximity explosion of intelligent ammunition. The specific steps are as follows:
[0005] The scattering area of the fragment group formed after the explosion of the projectile fuse is equivalent to a cubic space, and the scattering area is a section of area before and after the fragment group attacks the incoming air target.
[0006] The cube space is divided into multiple continuous multi-layer fragment groups with equal intervals in time and space by using the space-time finite element division method, and a continuous multi-layer fragment group space-time finite element model of the cube space area of the projectile-target intersection is established according to the multi-layer fragment groups;
[0007] Based on the continuous multi-layer fragment group space-time finite element model, according to the fragment shooting trajectory, and by using the linear slope relationship between the maximum horizontal section and the maximum vertical section formed by the fragments and the target, an intersection criterion for the fragments to effectively attack the target is established;
[0008] Based on the intersection criterion, according to the hitting probability and perforation damage probability of a single-layer fragment group to an aerial target, and by combining the damage weight and damage degree factor of a single cabin section of the aerial target, a damage probability calculation model of a single-layer fragment group to the target is established;
[0009] Calculate the damage probability of a single-layer fragment group to the target according to the damage probability calculation model, take the damage probability of each layer of fragment group to the target as the input parameter of the cloud model, and obtain the damage assessment result of the space-time continuous multi-layer fragment group in the cube area to the target based on the cloud model mechanism.
[0010] Preferably, the scattering area of the fragment group formed after the projectile fuse explodes is equivalent to a cube space, specifically:
[0011] The scattering area of the fragment group formed after the projectile fuse explodes is equivalent to a cube space ABCDMNOP, and the cube space is composed of the area ABCDEFGH before the fragment group attacks the incoming aerial target and the area EFGHMNOP after the fragment group attacks the incoming aerial target;
[0012] The area before the fragment group attacks the incoming aerial target shows the fragment flight trajectory, and the area after the fragment group attacks the incoming aerial target shows their intersection state.
[0013] Preferably, the method of using the space-time finite element division method to divide the cube space into multiple continuous multi-layer fragment groups with equal intervals in time and space is specifically:
[0014] The cube area ABCDEFGH is divided into n small cubes with equal intervals by using the space-time finite element division method Each cube is regarded as a layer of fragment group, and the moment of each layer of fragment group in this area is defined as t1~t n , and the multi-layer fragment groups divided in this area reflect the distribution density of the fragments;
[0015] The cube area EFGHMNOP is divided into m small cubes with equal intervals Each cube is regarded as a layer of fragment group, and the moment of each layer of fragment group in this area is defined as t n+1 ~tn+m , the multi-layer fragment group in this area division embodies the effective fragments that hit the incoming aerial target.
[0016] Preferably, the establishment of the intersection criterion for the effective attack of the fragments on the target includes the following steps:
[0017] Equivalent the aerial target to a cylinder, and define the coordinate system of the aerial target as o d x d y d z d ; Based on the central section of the equivalent cylinder, define the maximum vertical section A1A2A3A4 in the x d o d z d plane, and the maximum horizontal section B1B2B3B4 in the y d o d z d plane;
[0018] Connect the spatial position coordinates of the single-layer fragment group in the cube region ABCDEFGH to the four vertices of the maximum vertical rectangular section A1A2A3A4 and the maximum horizontal rectangular section B1B2B3B4 respectively, form the connection lines in the vertical and horizontal directions, calculate the maximum and minimum slopes of the four connection lines in each direction, and use them as the conditions for the effective intersection of the fragments attacking the incoming aerial target;
[0019] According to the pitch angle and azimuth angle θ i of the fragment flight in the cube region ABCDEFGH, obtain the tangent values of the attitude angles of the fragments ( and tgθ i ); Judge whether these two tangent values are within the range of the maximum and minimum slopes in the two directions. If they are within the range of the maximum and minimum slopes, it is considered that the fragment intersects with the aerial target, otherwise, there is no intersection between the two.
[0020] Preferably, the establishment of the damage probability calculation model of the single-layer fragment group to the target includes the following steps:
[0021] Introduce the unknown distance parameter κ and combine it with the fragment shooting trajectory to establish the linear equation expression of the fragment flight trajectory in the cube region ABCDEFGH;
[0022] Introduce two parameters, the axis κ' along the cylinder and the angle υ, to establish the side equation expression of the aerial target equivalent to the cylinder;
[0023] According to the condition of the equality of the two equations, obtain a system of equations containing three parameters κ, υ and κ'; Combine the known spatial position coordinates (x i , y i , zi ) Elevation angle and azimuth angle θ i , as well as the dimension l of the cylinder t , and solve for these three parameters (κ, υ, and κ');
[0024] If the system of equations has multiple solutions, then traverse each intersection point that intersects with the airborne target. The intersection point coordinates are the position information of the fragment hitting the target calculated by substituting the three parameter parameters into the fragment straight-line equation. Compare the magnitudes in the Z direction of these intersection point coordinates, and the point with the smallest coordinate in the Z direction is the actual intersection point of the fragment and the airborne target;
[0025] According to the compartment distribution of the target (M1, M2, …, M l , …, M e ), l = 1, 2, …, e, set the maximum fragment distribution density and the minimum fragment distribution density of a single compartment of the airborne target attacked by the fragments. Combine the distribution density of a single compartment of the airborne target attacked by the fragments to establish the hit probability model j of the j-th layer of fragment swarm attacking the M l compartment of the airborne target at time t
[0026] Based on the perforation area and the number of effective fragments of a single compartment of the airborne target attacked by a single layer of fragment swarm, establish the perforation damage probability model j of the j-th layer of fragment swarm attacking the M l compartment of the airborne target at time t
[0027] According to the perforation area damage weight number of effective fragments and the fragment distribution density of this compartment etc., construct the damage degree factor function of the target compartment Combine the hit probability and the perforation damage probability of a single compartment of the airborne target attacked by each layer of fragment swarm, and introduce the damage degree factor of the target compartment to establish the damage probability calculation model
[0028] Preferably, taking the damage probability of each layer of fragment swarm to the target as the input parameter of the cloud model, and obtaining the damage assessment result of the space-time continuous multi-layer fragment swarm to the target in the cube region based on the cloud model mechanism. The specific steps are as follows:
[0029] The damage probability of each layer of fragment groups attacking the incoming aerial targets As the input evaluation data of the cloud model, the digital characteristics of the damage cloud corresponding to the damage probability of each layer of fragment groups attacking the incoming aerial targets are obtained by using the inverse cloud generator Generate the damage cloud of each layer of fragment groups attacking the incoming aerial targets; and merge the damage clouds of multiple layers of fragment groups attacking the incoming aerial targets through cloud forward visualization to obtain the comprehensive target damage cloud
[0030] According to the divided damage levels of the aerial targets, and using the forward cloud generator to generate the target damage level reference cloud
[0031] Compare the comprehensive target damage cloud with the target damage level reference cloud, and obtain the corresponding damage value and damage evaluation level of the aerial targets attacked by multiple layers of fragment groups by comparing the similar areas
[0032] Preferably, the damage levels are divided into 5 levels, namely
[0033] Level I damage, that is, destruction, the key parts of the target have been destroyed and all combat capabilities are lost
[0034] Level II damage, that is, severe damage, the key parts of the target are damaged and the combat capabilities are basically lost
[0035] Level III damage, that is, moderate damage, the key parts of the target are severely damaged and part of the combat capabilities are lost
[0036] Level IV damage, that is, mild damage, part of the target is damaged and part of the combat capabilities remain
[0037] Level V damage, that is, no damage, no part of the target is damaged and the combat capabilities remain intact
[0038] The present invention also provides an evaluation system for the damage of a spatio-temporal sequence of fragment groups to a target, including
[0039] A space equivalence module for equating the scattering area of the fragment group formed after the projectile fuse explodes to a cubic space, and the scattering area is a section of area before and after the fragment group attacks the incoming aerial target
[0040] A first model construction module for dividing the cubic space into multiple continuous multi-layer fragment groups at equal intervals of time and space by using the spatio-temporal finite element division method, and establishing a continuous multi-layer fragment group spatio-temporal finite element model for the cubic space area of the projectile-target intersection according to the multi-layer fragment groups
[0041] A criterion construction module, configured to establish an intersection criterion for the fragments to effectively attack the target based on the spatio-temporal finite element model of the continuous multi-layer fragment group, according to the fragment shooting trajectory, and using the linear slope relationship between the maximum horizontal section and the maximum vertical section formed by the fragments and the target;
[0042] A second model construction module, configured to establish a damage probability calculation model for the single-layer fragment group to the target based on the intersection criterion, according to the hit probability and the perforation damage probability of the single-layer fragment group to the aerial target, and combining the damage weight and the damage degree factor of a single cabin section of the target;
[0043] An evaluation module, configured to calculate the damage probability of the single-layer fragment group to the target according to the damage probability calculation model, use the damage probability of each layer of the fragment group to the target as the input parameter of the cloud model, and obtain the damage evaluation result of the spatio-temporal continuous multi-layer fragment group in the cube region to the target based on the cloud model mechanism.
[0044] An evaluation method for the damage of a spatio-temporal sequence fragment group to a target provided by the present invention has the following beneficial effects:
[0045] The scattered area before and after the fragment group formed after the projectile fuse explodes attacks the incoming aerial target is equivalent to a cube space, and this area is divided into multiple multi-layer fragment groups with equal time intervals and spaces before and after the intersection, so as to visually observe the damage process of the fragment group attacking the incoming aerial target, which helps to objectively and accurately evaluate the target damage effect in the projectile-target intersection damage test.
[0046] Based on the multi-layer fragment group, a spatio-temporal finite element model of the continuous multi-layer fragment group in the cube space region of the projectile-target intersection and an intersection criterion for the fragments to effectively attack the target are established, without completely relying on the relevant parameters of the known and determined fragments. Furthermore, a damage probability calculation model for the single-layer fragment group to the target is established, the damage probability of the single-layer fragment group to the target is calculated according to the damage probability calculation model, the damage probability of each layer of the fragment group to the target is used as the input parameter of the cloud model, and the damage evaluation result of the spatio-temporal continuous multi-layer fragment group in the cube region to the target is obtained based on the cloud model mechanism, so as to obtain the damage evaluation of the randomly scattered fragment field to the aerial target.
[0047] It should be understood that the foregoing general description and the following detailed description are both exemplary and explanatory and are not intended to limit the present disclosure.
[0048] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Brief Description of the Drawings
[0049] To more clearly illustrate the embodiments of the present invention and their design solutions, the accompanying drawings required for this embodiment will be briefly introduced below. The accompanying drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0050] Figure 1 It is a flowchart of the evaluation method for the damage of a spatio-temporal sequence fragment group to a target provided by an embodiment of the present invention;
[0051] Figure 2 It is a schematic diagram of the front and rear regions ABCDEFGH and EFGHMNOP of an aerial target attacked by a fragment group divided based on spatio-temporal finite elements provided by an embodiment of the present invention;
[0052] Figure 3 It is a schematic diagram of the intersection of the maximum vertical section A1A2A3A4 and the maximum horizontal section B1B2B3B4 of a fragment and an aerial target provided by an embodiment of the present invention;
[0053] Figure 4 It is a flowchart of the damage effect evaluation method for an aerial target attacked by a multi-layer fragment group based on a cloud generator provided by an embodiment of the present invention. Specific Embodiments
[0054] To enable those skilled in the art to better understand the technical solutions of the present invention and implement them, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.
[0055] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific implementation manners.
[0056] Refer to Figures 1-4, the present invention provides a method for evaluating the damage of a spatio-temporal sequence of fragment groups to a target. The concept of the present invention is as follows: The scattering area before and after the fragment group formed by the explosion of the projectile fuse attacks the incoming aerial target is equivalent to a cubic space. The spatio-temporal finite element division method is used to divide this area into multiple continuous fragment groups with equal intervals in time and space in multiple layers, and a spatio-temporal finite element model of continuous multi-layer fragment groups in the cubic space area of the projectile-target intersection is established; Based on the defined cubic space, according to the fragment shooting trajectory, using the linear slope relationship between the maximum horizontal section and the maximum vertical section formed by the fragment and the target, a criterion model for the effective intersection of the fragment attacking the target is established; According to the hit probability and perforation damage probability of a single-layer fragment group to an aerial target, and combined with the damage weight and damage degree factor of a single cabin section of the target, a calculation function for the damage probability of a single-layer fragment group to the target is established; Regarding the damage probability of each layer of fragment groups as the input parameter of the cloud model, based on the cloud model mechanism, a spatio-temporal continuous multi-layer fragment group target damage evaluation model in the cubic area is established, forming a spatio-temporal finite element target damage evaluation system for the spatial cube.
[0057] Specifically, the method for evaluating the damage of a spatio-temporal sequence of fragment groups to a target provided by the present invention includes the following steps:
[0058] Step S1: The scattering area before and after the fragment group formed by the explosion of the projectile fuse attacks the incoming aerial target is equivalent to a cubic space ABCDMNOP, and the cubic area ABCDEFGH before the fragment group attacks the incoming aerial target and the cubic area EFGHMNOP after the fragment group attacks the incoming aerial target are respectively defined; According to the characteristics that the fragment group continuously penetrates and attacks the incoming aerial target in different ways at multiple moments in a short time, the cubic area ABCDEFGH is divided into n small cubes with equal intervals by using the spatio-temporal finite element division method The moment of each layer of fragment groups in this area is defined as t1~t n ; In the same way, the cubic area EFGHMNOP is divided into m small cubes with equal intervals The moment of each layer of fragment groups in this area is defined as t n+1 ~t n+m .
[0059] Step S2: The aerial target is equivalent to a cylinder, and its coordinate system is o d x d y d z d ; Define the maximum vertical section A1A2A3A4 in the x d o d z d plane, and the maximum vertical section in the y d o d z dThe maximum horizontal section B1B2B3B4 of the plane; calculate the maximum and minimum slopes of the connecting lines between the spatial position coordinates of the fragment group in the area in front of the incoming air target attacked by the fragment group and the four vertices of the maximum vertical section A1A2A3A4 and the maximum horizontal section B1B2B3B4, and use them as the intersection criterion between the fragment and the air target; determine whether the tangent value of the attitude angle ( and θ i ) is within the range of the maximum and minimum slopes in both directions. If this condition is met, the fragment and the air target have an intersection; otherwise, there is no intersection between the two.
[0060] Step S3: Deduce the spatial position coordinate information (x i , y i , z i ) of the fragment hitting the incoming air target according to the fragment shooting trajectory; according to the perforation area of the target compartment damage weight effective fragment number and the fragment distribution density of this compartment , etc., construct the damage degree factor function of the target compartment Combined with the hit probability of a single compartment of the target attacked by each layer of fragment group and the perforation damage probability and introduce the damage degree factor of the target compartment to establish a damage probability calculation model for the air target attacked by any layer of fragment group at any time after the projectile fuse explodes
[0061] Step S4: Use the damage probability of the air target attacked by a single layer of fragment group as the input evaluation data of the cloud model, and use the forward / reverse cloud generator to give the damage value and damage evaluation level of the air target attacked by multiple layers of fragment groups.
[0062] Example 1
[0063] The steps of dividing the cube space before and after the air target attacked by the fragment group into multiple layers of fragment groups with equal time intervals and spaces by using the space-time finite element method are as follows:
[0064] Step S11: Equivalently regard a scattered area before and after the air target attacked by the fragment group formed after the projectile fuse explodes as a cube space ABCDMNOP. The cube space consists of the area ABCDEFGH in front of the air target attacked by the fragment group and the area EFGHMNOP behind the air target attacked by the fragment group;
[0065] Step S12: Before the fragment group attacks the incoming aerial target, the area shows the flight trajectory of the fragments. After the fragment group attacks the incoming aerial target, the area shows their intersection state. According to the characteristics that the fragment group continuously penetrates and attacks the aerial target in different ways at multiple moments within a short time, the cubic region ABCDEFGH is divided into n small cubes with equal intervals by using the space-time finite element division method. The moment of each layer of the fragment group in this area is defined as t1 to t. n The multiple layers of fragment groups divided in this way reflect the distribution density of the fragments. In the same way, the cubic region EFGHMNOP is divided into m small cubes with equal intervals. The moment of each layer of the fragment group in this area is defined as t. n+1 ~t. n+m Taking the naming of the fragment group at t1 moment as an example, the small cube at this moment starts from vertex A and gets the names of eight vertices counterclockwise. The superscript of the letter a represents which vertex, and the subscript represents which moment. Since the two layers of fragment groups at t. n and t. n+1 share a common plane, the fragment group at t. n+1 moment is named as. The naming rules of other layers of fragment groups remain unchanged.
[0066] Refer to. Figure 2 where oxyz is the coordinate system of the fragment parameters, o is the projectile explosion point, and the coordinates are (0, 0, 0); o. d x. d y. d z. d is the coordinate system of the aerial target, o. d is the center of the head of the aerial target; o. d 's relative coordinates with respect to point o are (0,. L); is the height of the aerial target from the horizontal ground; L is the vertical distance from the projectile explosion position to the head of the aerial target. Before the fragment group attacks the incoming aerial target, it flies continuously towards the air according to t1, t2,..., t. j ,..., t. n At this time, j = 1, 2,..., n; and after the fragment group attacks the incoming aerial target, it continuously penetrates and attacks the aerial target according to t. n+1 , t. n+2 ,..., t. n+j′ ,..., t. n+m At this time, j' = 1, 2,..., m; t. j is the moment value corresponding to the jth layer of the fragment group before the intersection of the two, and t. n+j′ is the moment value corresponding to the j'th layer of the fragment group after the intersection of the two. The thickness of each layer of the fragment group is Δd.
[0067] Example 2
[0068] Refer to Figure 3 , the steps of establishing the intersection criterion between the fragments and the incoming aerial target according to the maximum and minimum slopes in step S2 are as follows:
[0069] Step S21: Define the coordinate system of the aerial target as o d x d y d z d , taking the maximum dimension of the projection of the aerial target on the x d o d y d plane as the diameter φ, and the maximum dimension of the projection on the x d o d z d plane as the length l t As an equivalent condition, the aerial target is equivalent to a cylinder. Equivalent the aerial target to a cylinder and define the coordinate system of the aerial target as o d x d y d z d ; Based on the central section of the equivalent cylinder, define the maximum vertical section A1A2A3A4 of the aerial target on the x d o d z d plane, and the maximum horizontal section B1B2B3B4 on the y d o d z d plane
[0070] Step S22: Based on the central section of the cylinder equivalent to the aerial target, define the maximum vertical section A1A2A3A4 of the aerial target on the x d o d z d plane, and the maximum horizontal section B1B2B3B4 on the y d o d z d plane; The four vertices of the maximum vertical section A1A2A3A4 are respectively connected with the coordinate positions of the i-th fragment of the j-th layer of the fragment group before the fragment group attacks the incoming aerial target at the t j th moment to form four connecting lines and to establish a fragment i at a distance L from the target Spatial geometric relationship with the maximum vertical cross-section A1A2A3A4 of the aerial target, i.e., the slope expressions of four straight lines, as shown in Equation (1); in the same way, form four connecting lines of this fragment with the vertices of the maximum horizontal cross-section B1B2B3B4 and Establish the spatial geometric relationship between this fragment and the maximum horizontal cross-section B1B2B3B4 of the aerial target, as shown in Equation (2). Equations (1) and (2) are used as the effective intersection judgment criteria for the maximum and minimum slopes of the i-th fragment of the j-th layer of the fragment group at the t j moment when attacking the incoming aerial target.
[0071]
[0072]
[0073] The spatial position coordinates of the single-layer fragment group within the cube region ABCDEFGH are respectively connected to the four vertices of the maximum vertical rectangular cross-section A1A2A3A4 and the maximum horizontal rectangular cross-section B1B2B3B4, forming connecting lines in the vertical and horizontal directions. Calculate the maximum and minimum slopes of the four connecting lines in each direction, and use them as the conditions for the effective intersection of the fragment attacking the incoming aerial target.
[0074] Step S23: Given the pitch angle j of the flight of the i-th fragment of the j-th layer of the fragment group at the t moment before the fragment group attacks the incoming aerial target and the azimuth angle θ i , calculate the slope tgθ i of the straight-line motion trajectory of the fragment in the xoz plane, and the slope in the yoz plane i Judge whether the slope tgθ of the fragment satisfies the slope range of Equation (1), and whether the slope
[0075] of the fragment satisfies the slope range of Equation (2); if the slope ranges of both Equation (1) and (2) are satisfied, then this fragment intersects with the aerial target, otherwise, there is no intersection between the two. According to the pitch angle i of the fragment flight within the cube region ABCDEFGH and the azimuth angle θ and tgθ i of the fragment, obtain the tangent values of the attitude angles of the fragment (
[0076] Example 3
[0077] The steps for establishing the damage probability calculation model of a single-layer fragment group attacking an incoming air target after the projectile fuse explodes in step S3 are as follows:
[0078] Step S31: Introduce the unknown distance parameter κ and combine it with the fragment shooting trajectory to establish the linear equation expression of the fragment flight trajectory within the cubic region ABCDEFGH; introduce two parameters, namely, along the axis κ' of the cylinder and the angle υ, to establish the side equation expression of the air target equivalent to a cylinder; according to the condition of the equality of the two equations, obtain a system of equations containing three parameters, κ, υ, and κ', as shown in Equation (3); combine the known spatial position coordinates (x i , y i , z i ) of the fragment, the elevation angle and the azimuth angle θ i , as well as the dimensions l t of the cylinder, and solve for these three parameters (κ, υ, and κ'); if the system of equations has multiple solutions, it is necessary to traverse each intersection point intersecting with the air target. The intersection point coordinates are the position information of the fragment hitting the target calculated by substituting the three parameter values into the fragment linear equation. Compare the magnitudes of the Z-directions of these intersection point coordinates, and the point with the smallest Z-direction coordinate is the actual intersection point of the fragment and the air target;
[0079]
[0080] Step S32: According to the compartment distribution (M1, M2, …, M l , …, M e ) of the target, where l = 1, 2, …, e, set the maximum fragment distribution density and the minimum fragment distribution density for a single compartment of the incoming air target attacked by the fragment. Combine the distribution density of a single compartment of the incoming air target attacked by the fragment to establish the hit probability model j at time t for the j-th layer of fragment group attacking the M l -th compartment of the incoming air target. Based on the perforation area of a single compartment of the incoming air target attacked by a single-layer fragment group and the effective number of fragments establish the perforation damage probability model j at time t for the j-th layer of fragment group attacking the M l -th compartment of the incoming air target.
[0081] Step S33: Construct the damage probability matrix of the air target attacked by any layer of fragment group at any time As shown in Equation (4), where each column of the matrix represents the damage probability of the aerial targets attacked by a single-layer fragment group Each row of the matrix represents the damage probability of a single compartment of the aerial targets attacked by a multi-layer fragment group Each item of the matrix is related to the hit probability and perforation damage probability of the fragment group, as well as the damage degree factor of the target compartment
[0082]
[0083] According to the distribution M l of the compartments of the target l material A l size B l thickness C and other information, establish a calculation function for the damage weight of the target compartment Based on the perforation area of the target compartment damage weight number of effective fragments and the fragment distribution density of this compartment etc., construct a damage degree factor function for the target compartment Combined with the hit probability and perforation damage probability of a single compartment of the target attacked by each layer of fragment group
[0084] Example 4
[0085] Refer to Figure 4 , the steps of using the forward / reverse cloud generator to give the corresponding damage value and damage assessment level of the aerial targets attacked by the multi-layer fragment group in step S4 are as follows:
[0086] Step S41: Take the damage probability of the aerial targets attacked by each layer of fragment group as the input evaluation data of the cloud model, and use the reverse cloud generator to obtain the digital characteristics of the damage cloud corresponding to the damage probability of the aerial targets attacked by each layer of fragment group and establish its calculation model, where are respectively the j expected value, entropy value and hyper-entropy value of the damage cloud corresponding to the damage probability of the aerial targets attacked by the j-th layer of fragment group at time t ; use the forward cloud generator to generate the damage cloud of the aerial targets attacked by each layer of fragment group; and merge the damage clouds of the aerial targets attacked by the multi-layer fragment group through cloud forward visualization to obtain the comprehensive damage cloud of the target;
[0087] Step S42: According to the expert opinions, the target damage level is divided into 5 grades, and 5 damage level intervals corresponding to the damage grades are divided within [0, 1], which are: Grade I damage (destroyed, the vital parts of the target have been destroyed and all combat capabilities are lost), Grade II damage (severe damage, the vital parts of the target are damaged and the combat capabilities are basically lost); Grade III damage (moderate damage, the key parts of the target are severely damaged and part of the combat capabilities are lost), Grade IV damage (minor damage, some parts of the target are damaged and there are still some combat capabilities), Grade V damage (no damage, no parts of the target are damaged and the combat capabilities are still intact); According to the digital features in Step S41 of the calculation model, and use the forward cloud generator to obtain the target damage level reference cloud;
[0088] Step S43: According to the target damage comprehensive cloud and the target damage level reference cloud of the aerial target attacked by the fragment group, obtain the common area (similar area) where the expected curves of the target damage comprehensive cloud and the target damage level reference cloud intersect, and based on the fact that the similar area where the expected curves of the target damage comprehensive cloud of the aerial target attacked by the fragment group and the target damage level reference cloud intersect at a certain level is the largest, determine the damage level of the aerial target attacked by the fragment group; Determine the damage value of the aerial target attacked by the fragment group based on the value corresponding to the intersection of the expected curves of the target damage comprehensive cloud and the target damage level reference cloud.
[0089] Based on the same inventive concept, the present invention also provides an evaluation system for the damage of a spatio-temporal sequence fragment group to a target, including a space equivalence module, a first model construction module, a criterion construction module, a second model construction module and an evaluation module.
[0090] Specifically, the space equivalence module is used to equivalent the scattering area of the fragment group formed after the projectile fuse explodes into a cubic space, and the scattering area is a section of area before and after the aerial target attacked by the fragment group.
[0091] The first model construction module is used to divide the cubic space into multiple continuous multi-layer fragment groups with equal intervals in time and space by using the spatio-temporal finite element division method, and establish a continuous multi-layer fragment group spatio-temporal finite element model for the cubic space area of the projectile-target intersection according to the multi-layer fragment groups.
[0092] The criterion construction module is used to establish an intersection criterion for the fragments to effectively attack the target based on the continuous multi-layer fragment group spatio-temporal finite element model, according to the fragment shooting trajectory, by using the linear slope relationship between the maximum horizontal section and the maximum vertical section formed by the fragments and the target.
[0093] The second model construction module is used to establish a damage probability calculation model of a single-layer fragment group against a target based on the intersection criterion, according to the hit probability and perforation damage probability of the single-layer fragment group against an aerial target, and in combination with the damage weight and damage degree factor of a single cabin section of the target.
[0094] The evaluation module is used to calculate the damage probability of the single-layer fragment group against the target according to the damage probability calculation model, take the damage probability of each layer of fragment group against the target as the input parameter of the cloud model, and obtain the damage evaluation result of the multi-layer fragment group with spatio-temporal continuity in the cube region against the target based on the cloud model mechanism.
[0095] Each module in the above evaluation system for the damage of the spatio-temporal sequence fragment group against the target can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor in the computer device in the form of hardware or independent of it, or stored in the memory in the computer device in the form of software, so as to facilitate the processor to call and execute the operations corresponding to the above modules.
[0096] The present invention equivalently regards a scattering area before and after a fragment group formed after the explosion of a projectile fuse attacks an incoming aerial target as a cube space, and divides this area into multi-layer fragment groups with equal time intervals and spaces before and after the intersection of the two, so as to intuitively observe the damage process of the fragment group attacking the incoming aerial target; based on the spatial position coordinates, pitch angle, and yaw angle of the fragments, an effective intersection criterion between the fragments and the aerial target is established; according to the hit probability and perforation damage probability of a single-layer fragment group attacking different cabin sections of the incoming aerial target, as well as the damage weight of the target cabin section, and introducing its damage degree factor, a damage probability calculation method of a single-layer fragment group attacking the incoming aerial target is established; the positive / negative cloud generator is used to evaluate the damage effect of the multi-layer fragment group attacking the incoming aerial target, and a damage evaluation method for a randomly scattered fragment field against an aerial target is studied, forming a spatial cube spatio-temporal finite element target damage evaluation system.
[0097] In addition, although exemplary embodiments have been described herein, the scope includes any and all embodiments based on the present disclosure having equivalent elements, modifications, omissions, combinations (e.g., solutions that cross various embodiments), adaptations, or changes. The elements in the claims will be broadly interpreted based on the language used in the claims and are not limited to the examples described in this specification or during the implementation of this application, and the examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered only as examples, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.
[0098] The foregoing description is intended to be illustrative and not restrictive. For example, the above examples (or one or more aspects thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. Additionally, in the above detailed description, various features may be grouped together to simplify the disclosure. This should not be construed as an intention that any non-claimed disclosed feature is necessary for any claim. On the contrary, the subject matter of the present invention may be less than all of the features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description by way of example or illustration, where each claim stands on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the present invention should be determined with reference to the appended claims and the full scope of equivalents to which those claims are entitled.
[0099] The above-described embodiments are merely preferred specific embodiments of the present invention, and the protection scope of the present invention is not limited thereto. Any simple variations or equivalent replacements of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope disclosed by the present invention all fall within the protection scope of the present invention.
Claims
1. An evaluation method for the damage of a spatio-temporal sequence of fragment groups to a target, characterized in that It includes the following steps: The scattering area of the fragment group formed after the projectile fuse explodes is equivalent to a cubic space, and the scattering area is a section of the area before and after the fragment group attacks the incoming aerial target; Adopt the space-time finite element division method to divide the cubic space into multiple continuous multi-layer fragment groups with equal time and space intervals, and establish a continuous multi-layer fragment group space-time finite element model of the projectile-target intersection in the cubic space area according to the multi-layer fragment groups; Based on the continuous multi-layer fragment group space-time finite element model, according to the fragment shooting trajectory, use the linear slope relationship between the maximum horizontal section and the maximum vertical section formed by the fragment and the target to establish an intersection criterion for the fragment to effectively attack the target; Based on the intersection criterion, according to the hit probability and perforation damage probability of the single-layer fragment group to the aerial target, and combined with the damage weight and damage degree factor of a single cabin section of the aerial target, establish a damage probability calculation model of the single-layer fragment group to the target; Calculate the damage probability of the single-layer fragment group to the target according to the damage probability calculation model, use the damage probability of each layer of fragment group to the target as the input parameter of the cloud model, and obtain the damage assessment result of the space-time continuous multi-layer fragment group in the cubic area based on the cloud model mechanism.
2. The method for evaluating the damage to a target by a spatio-temporal sequence of fragment groups according to claim 1, wherein The specific method of equivalent the scattering area of the fragment group formed after the projectile fuse explodes to a cubic space is as follows: The scattering area of the fragment group formed after the projectile fuse explodes is equivalent to a cubic space ABCDMNOP, and the cubic space is composed of the area ABCDEFGH before the fragment group attacks the incoming aerial target and the area EFGHMNOP after the fragment group attacks the incoming aerial target; The area before the fragment group attacks the incoming aerial target shows the fragment flight trajectory, and the area after the fragment group attacks the incoming aerial target shows the intersection state of the two; 3. The method for evaluating the damage to a target by a spatio-temporal sequence of fragmentation clusters according to claim 2, characterized in that, The specific method of using the space-time finite element division method to divide the cubic space into multiple continuous multi-layer fragment groups with equal time and space intervals is as follows: The cubic region ABCDEFGH is divided into n equally spaced small cubes using a space-time finite element partitioning method. Each cube is regarded as a layer of fragment groups, and the time of each layer of fragment groups in this region is defined as t1 to t. n The multiple layers of fragment groups divided in this region reflect the distribution density of the fragments. Divide the cubic region EFGHMNOP into m equally spaced small cubes Each cube is regarded as a layer of fragment groups, and the moment of each layer of fragment groups in this region is defined as t n+1 ~t n+m , and the multiple layers of fragment groups divided in this region represent the effective fragments that hit the incoming aerial target.
4. The method for evaluating the damage to a target by a spatio-temporal sequence of fragmentation clusters according to claim 3, wherein The establishment of the intersection criterion for the fragment to effectively attack the target includes the following steps: The airborne target is equivalent to a cylinder, and the coordinate system of the airborne target is defined as o d x d y d z d ; Based on the central section of the equivalent cylinder, the maximum vertical section A1A2A3A4 in the x d o d z d plane, and the maximum horizontal section B1B2B3B4 in the y d o d z d plane are defined; The spatial position coordinates of the single-layer fragment group in the cubic area ABCDEFGH are respectively connected to the four vertices of the maximum vertical rectangular section A1A2A3A4 and the maximum horizontal rectangular section B1B2B3B4 to form connections in the vertical and horizontal directions, calculate the maximum and minimum slopes of the four connections in each direction, and use them as the conditions for the fragment to effectively intersect the incoming aerial target; According to the pitch angle of the fragment flight within the cubic region ABCDEFGH and the azimuth angle θ i , the tangent values of the attitude angles of the fragments are obtained and tgθ i ; it is judged whether these two tangent values are within the range of the maximum and minimum slopes in two directions. If they are within the range of the maximum and minimum slopes, it is regarded that the fragment intersects with the aerial target. Otherwise, there is no intersection between the two.
5. The method for evaluating the damage to a target by a spatio-temporal sequence of fragments according to claim 4, wherein The establishment of the damage probability calculation model of the single-layer fragment group to the target includes the following steps: Introduce the unknown distance parameter κ and combine it with the fragment shooting trajectory to establish a linear equation expression of the fragment flight trajectory in the cubic area ABCDEFGH; Introduce two parameters, the axis κ' along the cylinder and the angle υ, to establish a side equation expression of the aerial target equivalent to a cylinder; According to the condition that the two equations are equal, a system of equations containing three parameters κ, υ, and κ' is obtained; combined with the known spatial position coordinates (x i , y i , z i ) of the fragment, the pitch angle and the azimuth angle θ i , as well as the dimension l t of the cylinder, the three parameters κ, υ, and κ' are solved; If the system of equations has multiple solutions, then traverse each intersection point intersecting with the aerial target. The intersection point coordinates are the position information of the fragment hitting the target calculated by substituting the three parametric parameters into the fragment straight line equation. Compare the magnitudes of the Z directions of these intersection point coordinates, and the point with the smallest Z direction coordinate is the actual intersection point of the fragment and the aerial target; According to the compartment distribution of the target (M1, M2, …, M l , …, M e ), l = 1, 2, …, e, set the maximum fragment distribution density and the minimum fragment distribution density of a single compartment of the aerial target attacked by fragments Combined with the distribution density of a single compartment of the aerial target attacked by fragments Establish the hit probability model of the j-th layer of fragment swarm attacking the M compartment of the aerial target at time t j l l compartment Perforation area of a single compartment of an incoming aerial target attacked by a single-layer fragment swarm and the number of effective fragments Establish the j perforation damage probability model of the M l compartment of the incoming aerial target attacked by the j-th layer of fragment swarm at time t According to the perforation area of the target compartment Damage weight Number of effective fragments and the fragment distribution density of this compartment Construct the damage degree factor function of the target compartment Combined with the hit probability of each layer of fragment group attacking a single compartment of the incoming air target and the perforation damage probability and introduce the damage degree factor of the target compartment Establish a damage probability calculation model for the fragment group of any layer attacking the incoming air target at any time after the projectile fuse explodes 6. The evaluation method for damage of a target by a spatio-temporal sequence of fragment groups according to claim 5, characterized in that Taking the damage probability of each layer of fragment group to the target as the input parameter of the cloud model, and based on the cloud model mechanism, the damage assessment result of the spatio-temporally continuous multi-layer fragment group in the cube region to the target is obtained. The specific steps are as follows: The damage probability of each layer of fragment groups attacking an incoming air target As the input evaluation data of the cloud model, use the inverse cloud generator to obtain the digital characteristics of the damage cloud corresponding to the damage probability of each layer of fragment groups attacking an incoming air target Generate the damage cloud of each layer of fragment groups attacking an incoming air target; and merge the damage clouds of multiple layers of fragment groups attacking an incoming air target through cloud forward visualization to obtain the comprehensive target damage cloud; According to the divided damage levels of the airborne targets, and using the forward cloud generator, the reference cloud of the target damage level is generated to obtain the reference cloud of the target damage level; Compare the comprehensive cloud of target damage with the reference cloud of target damage level, and obtain the corresponding damage value and damage assessment level of the multi-layer fragment group attacking the incoming airborne target by comparing the similar areas.
7. The method for evaluating the damage of a target by a spatio-temporal sequence of fragment groups according to claim 6, wherein The damage levels are divided into 5 levels, namely: Level I damage, that is, destruction, the vital parts of the target have been destroyed and all combat capabilities are lost; Level II damage, that is, severe damage, the vital parts of the target are damaged and the combat capabilities are basically lost; Level III damage, that is, moderate damage, the key parts of the target are severely damaged and some combat capabilities are lost; Level IV damage, that is, minor damage, some parts of the target are damaged and some combat capabilities still remain; Level V damage, that is, no damage, no part of the target is damaged and the combat capabilities are still intact.
8. An evaluation system for the damage of a spatio-temporal sequence of fragment groups to a target, characterized in that, Including: A spatial equivalent module for equating the scattering area of the fragment group formed after the explosion of the projectile fuse to a cube space, where the scattering area is a section of the area before and after the multi-layer fragment group attacks the incoming airborne target; A first model construction module for dividing the cube space into multiple continuously multi-layer fragment groups with equal intervals in time and space by using the spatio-temporal finite element division method, and establishing a spatio-temporal finite element model of the continuously multi-layer fragment group in the cube space region of the projectile-target intersection according to the multi-layer fragment group; A criterion construction module for establishing an intersection criterion for the fragments to effectively attack the target based on the spatio-temporal finite element model of the continuously multi-layer fragment group, according to the fragment shooting trajectory, and using the linear slope relationship between the maximum horizontal section and the maximum vertical section formed by the fragments and the target; A second model construction module for establishing a damage probability calculation model of a single-layer fragment group to the target based on the intersection criterion, according to the hit probability and perforation damage probability of the single-layer fragment group to the airborne target, and combining the damage weight and damage degree factor of a single cabin section of the target; An evaluation module for calculating the damage probability of a single-layer fragment group to the target according to the damage probability calculation model, taking the damage probability of each layer of fragment group to the target as the input parameter of the cloud model, and obtaining the damage assessment result of the spatio-temporally continuous multi-layer fragment group in the cube region to the target based on the cloud model mechanism.