A test system and method for evaluating the destructive power of anti-radiation ammunition

Abstract

The present invention relates to a test system and method for evaluating the destructive power of anti-radiation ammunition, which belongs to the field of ammunition engineering technology and solves the problem of inaccurate evaluation of the destructive power of anti-radiation ammunition in the prior art. The evaluation method of the present invention comprises: step S1: building a test system for evaluating the destructive power of anti-radiation ammunition; step S2: detonating the ammunition to be tested and conducting an anti-radiation ammunition destructive test; statistically analyzing the destructive data of the antenna equivalent target; step S3: establishing a damaged phased array radar antenna model according to the destructive data of the antenna equivalent target; step S4: according to the antenna performance parameters obtained by simulation and analyzing its detection distance R, calculating the destructive probability P of the ammunition to be tested to the phased array radar antenna at different killing distances, evaluating the functional damage of the target antenna; obtaining the relationship between the destructive power E of the ammunition to be tested and its action radius r within the destructive range. The present invention realizes the functional evaluation of the destructive power of anti-radiation ammunition.

Description

Technical Field

[0001] The present invention relates to the field of ammunition engineering technology, and in particular to a test system and method for evaluating the destructive power of anti-radiation ammunition. Background Art

[0002] Anti-radiation missiles are an important means of attacking large phased array radars and have always been highly valued at home and abroad. Accurately grasping the destructive power indicators of the warheads of this type of ammunition is the core basis for guiding combat use and is also the driving goal for optimizing the structural design of the warhead. With the development of technology, the focus of the evaluation of the destructive power of anti-radiation ammunition has become to quantitatively characterize the results of the action of the destructive factors on equivalent targets, effectors and target entities by combining with the target.

[0003] The antenna is the core component of the phased array radar to exert its superior performance. It is usually exposed outside the radar cabin protection structure and becomes the target of direct missile attack. The typical phased array radar antenna structure generally includes a radome, a radiation unit, an antenna substrate and other structures. The shock waves and fragments generated by the explosion of the missile warhead destroy the radar antenna, causing the radar detection function to decline, thereby achieving the purpose of effective damage. Due to the large size and high value of the phased array radar target, it is impossible to use real targets for damage tests to evaluate the power of the warhead.

[0004] Most existing methods equate the antenna structure to an aluminum or steel target plate of a certain thickness. When the shock wave and fragment damage elements act, the target plate is deformed or perforated, causing physical damage effects. Although this method can solve certain problems, it also has many defects. First, there is a large gap between the single-structure target plate and the multi-layer structure of the radar antenna, and it cannot truly reflect the target characteristics; second, the physical damage of this single structure can only be characterized by the deflection and the number of perforations of the plate, which cannot evaluate the damage to the core functional component of the antenna, namely the radiation unit, affecting the accuracy of the evaluation; third, the equivalent structure does not have a reserved antenna electrical performance detection module, so it is impossible to further evaluate the functional damage effect of the warhead on the radar antenna; fourth, in recent years, the impact release effect of energetic fragments on metal target plates has been confirmed, which has enabled it to be used in anti-radiation ammunition. The damage elements of the new ammunition warhead have multiple damage effects such as penetration, explosion, and combustion. The single-structure target plate can only reflect its penetration damage effect, and cannot reflect its comprehensive damage effect. Therefore, there is a lack of damage power evaluation for this type of ammunition. Fifth, although the existing anti-radiation ammunition warhead parameters and their payload parameters reflect the power of the warhead from different levels, it is difficult to establish a direct connection with target damage, which limits the development of weapon damage effectiveness evaluation.

[0005] In view of the above analysis, it is necessary to provide an equivalent target structure that can more accurately reflect the damage state of the phased array radar antenna and a method for evaluating the damage power of anti-radiation munitions, so as to solve the problem of inaccurate assessment of the damage power of anti-radiation munitions warheads to phased array radar targets. Summary of the invention

[0006] In view of the above analysis, the present invention aims to provide a test system and method for evaluating the destructive power of anti-radiation munitions, so as to solve the problem of inaccurate and incomplete evaluation of the destructive power of existing anti-radiation munitions on phased array radar antennas.

[0007] The purpose of the present invention is mainly achieved through the following technical solutions:

[0008] A test system for evaluating the destructive power of anti-radiation ammunition, comprising: ammunition to be tested, an antenna equivalent target, a velocity measurement target and a displacement sensor;

[0009] The ammunition to be tested is located in the center of the test system;

[0010] The antenna equivalent target, velocity measuring target and displacement sensor are arranged around the ammunition to be tested;

[0011] The antenna equivalent target comprises: a radome, a dielectric rod, a dielectric rod fixing substrate, a phase shifter and a phase shifter fixing device; the radome dielectric rod fixing substrate and the phase shifter fixing device are parallel to each other and arranged at intervals; a plurality of dielectric rods are arranged on the side of the dielectric rod fixing substrate facing the radome, and the dielectric rods are used to simulate a single antenna structure of a phased array radar antenna; the phase shifter is fixedly mounted on the phase shifter fixing device, and the phase shifter is used to be an array element structure of an equivalent phased array radar antenna;

[0012] The speed measuring target is used to test the fragment speed of the ammunition to be tested; the displacement sensor is arranged on the back of the antenna equivalent target; the displacement sensor is used to measure the deformation of the antenna equivalent target.

[0013] Furthermore, the phase shifter fixing device comprises: a first substrate and a second substrate, the phase shifter is fixedly installed between the first substrate and the second substrate, and a plurality of phase shifters are arranged in parallel.

[0014] Furthermore, at least three groups of antenna equivalent targets are arranged in the circumferential direction of the ammunition to be tested; the three groups of antenna equivalent targets are respectively arranged on circles with different radii and the ammunition to be tested as the center; the distances between two antenna equivalent targets in the same group and the ammunition to be tested are equal, and the circumferential interval between the two antenna equivalent targets in the same group is 180°; the distances between antenna equivalent targets in different groups and the ammunition to be tested are different, and they are staggered along the circumferential direction of the ammunition to be tested;

[0015] The velocity measuring targets are arranged in four groups at intervals of 90° along the circumferential direction of the ammunition to be tested; and a plurality of velocity measuring targets in each group are arranged at equal intervals along the radial direction of the ammunition to be tested.

[0016] The ammunition to be tested is placed on an ammunition rack 1.5 meters above the ground; the heights of the antenna equivalent target, the velocity measuring target and the displacement sensor are equal to the height of the ammunition to be tested.

[0017] A method for evaluating the destructive power of anti-radiation ammunition, using the test system for evaluating the destructive power of anti-radiation ammunition, comprises the following steps:

[0018] Step S1: Building the test system for evaluating the destructive power of anti-radiation ammunition;

[0019] Step S2: detonating the ammunition to be tested to perform an anti-radiation ammunition damage test; after the test is completed, collecting damage data of the antenna equivalent target;

[0020] Step S3: According to the damage data of the antenna equivalent target, the phased array radar antenna model before and after damage is established; according to the antenna performance parameters obtained by simulation, the maximum detection distance R of the phased array radar antenna before and after damage is analyzed and calculated. max and R dmax and damage probability P;

[0021] Step S4: Calculate the damage probability P of the ammunition to be tested to the phased array radar antenna at different killing distances, and evaluate the functional damage to the target antenna; obtain the relationship between the damage power E of the ammunition to be tested and its action radius r within the damage range.

[0022] Furthermore, in step S2, obtaining damage data of the antenna equivalent target includes:

[0023] Step S21: Record the number of damaged phase shifters;

[0024] Step S22: recording the deformation of multiple antenna equivalent targets through displacement sensors;

[0025] Step S23: Establish a rectangular coordinate system with the center of the antenna equivalent target as the origin, and count the coordinates of the damaged phase shifter on the antenna equivalent target.

[0026] Furthermore, in step S3, after the damaged phased array radar antenna model is established, the antenna model in the damaged state is imported into the simulation software for analysis, and the directional pattern of the damaged phased array radar antenna can be obtained through simulation analysis.

[0027] Furthermore, in step S3, according to the antenna gain G t Calculate the maximum detection range R of phased array radar antenna max ; Maximum detection distance Rmax It is expressed as:

[0028] ,

[0029] Where: P t is the peak transmit power; G t is the antenna gain; λ is the signal wavelength; σ is the target cross-sectional area; N i is the receiver input noise power; F n is the receiver noise factor; (S / N) o min When the radar detection threshold is equal to the minimum output signal-to-noise ratio of the radar receiver.

[0030] When the type of target radar is determined, the physical damage of anti-radiation ammunition to the phased array radar only brings a gain of G t The other parameters are determined according to the type of phased array radar antenna. Therefore, according to the radiation pattern, the value of the antenna gain Gt corresponding to the phased array radar antenna before and after damage can be known, and the maximum detection distance R before and after damage can be calculated. max and R dmax ;

[0031] Furthermore, in step S4, the damage probability P is the ratio of the maximum detection distance of the radar antenna after damage to the maximum detection distance before damage, that is, P=R d max / R max .

[0032] Furthermore, in step S4, according to the damage probability P corresponding to different distances r between the phased array radar antenna and the ammunition to be tested, a damage probability curve at different killing distances, i.e., a P(r) curve, is obtained; the damage power of the ammunition to be tested is set to be uniform in the circumferential direction; and the damage power E of the ammunition to be tested within the damage range is calculated according to the P(r) curve, and the calculation model of the damage power E is:

[0033] ,

[0034] Where: P(r) is the damage probability of the radar antenna whose distance from the munition to be tested is r; r is the fragmentation radius of the munition to be tested.

[0035] Alternatively, in step S4, the position of the ammunition to be tested is taken as the origin; according to the damage probability P corresponding to the antenna equivalent target of the phased array radar antenna and the different coordinates (x, y, z) of the ammunition to be tested, a damage probability curve corresponding to different coordinate positions, i.e., a P (x, y, z) curve, can be tested and obtained; according to the P (x, y, z) curve, the damage power E of the ammunition to be tested within the damage range of the anti-radiation ammunition in the three-dimensional power field is calculated, and the calculation model of the damage power E is:

[0036] ,

[0037] Where: P(x, y, z) is the probability of target damage at point (x, y, z) in the force field.

[0038] The technical solution of the present invention can achieve at least one of the following effects:

[0039] 1. The present invention discloses a test system and method for evaluating the destructive power of anti-radiation ammunition. This method adopts a multi-layer structure as the antenna equivalent target of the phased array antenna, which can not only reflect the actual phased array radar antenna structure, but also sets the radiation unit of the radar antenna, which can directly characterize the damage quantity of the antenna array element, thereby ensuring the authenticity and accuracy of the evaluation.

[0040] 2. The present invention discloses a test system and method for evaluating the destructive power of anti-radiation ammunition. This method adopts a method of setting a circuit board on the back of an antenna equivalent target. Through electrical signal measurement and simulation calculation, it can effectively evaluate the functional damage state of the antenna equivalent target, solving the problem that the original method can only evaluate the physical damage of the ammunition.

[0041] 3. The present invention discloses a test system and method for evaluating the destructive power of anti-radiation ammunition. The equivalent target structure adopted in this method overcomes the problem that the original method can only evaluate a single perforation damage effect, and can greatly improve the scientific level of ammunition power evaluation.

[0042] 4. The present invention discloses a test system and method for evaluating the destructive power of anti-radiation ammunition. This method adopts the target damage effect results and designs a test system with a concentric ring layout. It can measure the degree of radar damage at different killing distances, and can relatively uniformly analyze and evaluate the destructive power of different anti-radiation ammunition warheads, realize the destructive power detection within the ammunition range, and quantify and compare the destructive power of different types of anti-radiation ammunition, which can provide reference and support for the design improvement of anti-radiation ammunition or the development of new warheads.

[0043] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components;

[0045] Figure 1A schematic diagram of the arrangement of a test system for evaluating the destructive power of anti-radiation ammunition according to the present invention;

[0046] Figure 2 It is a structural schematic diagram of the antenna equivalent target;

[0047] Figure 3 is a schematic diagram of the structure of the radome;

[0048] Figure 4 is a schematic diagram of the structure of the dielectric rod;

[0049] Figure 5 is a structural schematic diagram of a dielectric rod fixing plate;

[0050] Figure 6 is a schematic structural diagram of a phase shifter fixing device;

[0051] Figure 7 is a structural schematic diagram of a phase shifter;

[0052] Figure 8 This is a schematic diagram of the target plate damage statistics method;

[0053] Fig. 9 It is the radar antenna equivalent target simulation model;

[0054] Fig.10 is the radiation pattern of the radar antenna equivalent target;

[0055] Fig.11 Schematic diagram of the simulation model of the antenna after the damage test.

[0056] Reference numerals:

[0057] 10- ammunition to be tested; 20- antenna equivalent target; 30- velocity target; 40- displacement sensor; 50- peripheral block;

[0058] 1-antenna cover; 2-dielectric rod; 3-dielectric rod fixing substrate; 4-phase shifter; 5-phase shifter fixing device; 6-circuit board; 7-connecting screws; 1-1-first panel; 1-2-second panel; 1-3-panel interlayer; 3-1-dielectric rod mounting hole; 4-1-metal supporting structure; 4-2-magnetic rod unit; 5-1-first layer substrate; 5-2-second layer substrate. DETAILED DESCRIPTION

[0059] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0060] Example 1

[0061] A test system for evaluating the destructive power of anti-radiation munitions, such as Figure 1 As shown, it includes: ammunition to be tested 10, antenna equivalent target 20, speed measuring target 30 and displacement sensor 40.

[0062] like Figure 1 As shown, the test system of the present invention is arranged in a multi-layer concentric ring shape.

[0063] Specifically, the ammunition to be tested 10 is located in the center of the test system; that is, the antenna equivalent target 20, the velocity measurement target 30 and the displacement sensor 40 are arranged around the ammunition to be tested 10 with the ammunition to be tested 10 as the center, as shown in FIG. Figure 1 shown.

[0064] Specifically, at least three groups of antenna equivalent targets 20 are arranged in the circumferential direction of the ammunition 10 to be tested; the three groups of antenna equivalent targets 20 are respectively arranged on circles with different radii and the ammunition 10 to be tested as the center; the distance between two antenna equivalent targets 20 in the same group and the ammunition 10 to be tested is equal, and the circumferential interval between the two antenna equivalent targets 20 in the same group is 180°; the distance between antenna equivalent targets 20 in different groups and the ammunition 10 to be tested is different, and they are staggered along the circumferential direction of the ammunition 10 to be tested.

[0065] like Figure 1 As shown, there are six antenna equivalent targets 20, two in each group; the two antenna equivalent targets 20 in the same group are located on the same circular ring centered on the ammunition to be tested 10, and the two antenna equivalent targets 20 in the same group are symmetrically arranged. Furthermore, three groups of antenna equivalent targets 20 are respectively arranged on three concentric circular rings with different radii, and are circumferentially staggered.

[0066] In a specific embodiment of the present invention, the distances between the three groups of antenna equivalent targets 20 and the ammunition to be tested 10 are 3m, 4m and 5m respectively. Figure 1 shown.

[0067] Furthermore, the displacement sensor 40 is arranged on the back side of the antenna equivalent target 20, that is, the side away from the ammunition 10 to be tested; the displacement sensor 40 is used to measure the target plate deformation of the antenna equivalent target 20; the target plate deformation is the back structure deformation of the antenna equivalent target 20.

[0068] Furthermore, four groups of the velocity measuring targets 30 are arranged at intervals of 90° along the circumferential direction of the ammunition 10 to be tested; a plurality of velocity measuring targets 30 in each group are arranged at equal intervals along the radial direction of the ammunition 10 to be tested, and the velocity measuring targets 30 are used to test the fragment velocity of the ammunition 10 to be tested.

[0069] Furthermore, a circular outer barrier 50 is provided at the outermost side of the test system, and the outer barrier 50 is used to protect against the impact of fragments of the ammunition 10 to be tested, and to control the impact range of the explosion power of the ammunition to be tested within the internal space of the outer barrier 50 .

[0070] The structure of the existing phased array radar antenna is mainly composed of a radome, a dielectric rod, a metal matrix, a phase shifter unit, an excitation circuit, a control circuit, etc., and the array frame is supported by two hydraulic rods. Since the overall size of the radar antenna is too large, several sub-arrays of the radar antenna are selected to design an equivalent target in the process of designing the target plate. In the present invention, an antenna equivalent target is used to replace the real radar structure to carry out the damage test of the ammunition, thereby avoiding damage to the real radar structure. At the same time, it can also realize the realistic simulation of the damage state of the radar after the impact of the ammunition explosion, which can more accurately and comprehensively reflect the power effect of the anti-radiation ammunition.

[0071] like Figure 2 As shown, the antenna equivalent target 20 of the present invention includes: a radome 1, a dielectric rod 2, a dielectric rod fixing substrate 3, a phase shifter 4 and a phase shifter fixing device 5.

[0072] Specifically, the dielectric rod fixing substrate 3 and the phase shifter fixing device 5 of the antenna cover 1 are parallel to each other and arranged at intervals; a plurality of dielectric rods 2 are arranged on the side of the dielectric rod fixing substrate 3 facing the antenna cover 1, and the dielectric rods 2 are used to simulate a single antenna structure of a phased array radar antenna; the phase shifter 4 is fixedly mounted on the phase shifter fixing device 5.

[0073] like Figure 3 As shown, the antenna cover 1 adopts a sandwich structure, including a first panel 1-1 and a second panel 1-2 on both sides, and an internal panel interlayer 1-3. Specifically, the material of the first panel 1-1 and the second panel 1-2 is glass fiber reinforced plastic, and the material of the panel interlayer 1-3 is hard polyurethane foam plastic. In the present invention, the antenna cover 1 is used to be equivalent to a radar antenna cover structure. When the explosion shock wave acts on the radar, the antenna cover can absorb the shock wave energy, protect the internal components of the radar, and reduce the damage to the radar antenna.

[0074] like Figure 4 As shown, the dielectric rod 2 is a cylindrical structure, and the material of the dielectric rod 2 is microcrystalline glass. The dielectric rod 2 is used to be equivalent to the dielectric antenna structure in a real radar antenna. The dielectric rod 2 is made of the same material as the real antenna and has good dielectric and insulation properties. A single dielectric rod 2 is cylindrical, with a size of Φ16×25mm, and is installed on a dielectric rod fixing substrate 3 to protect the phase shifter 4; the dielectric rod 2 is fixed to the dielectric rod fixing substrate 3 with epoxy resin structural glue, and the height of the dielectric rod 2 protruding from the dielectric rod fixing substrate 3 is 10mm.

[0075] like Figure 5 As shown, the dielectric rod fixing substrate 3 is a rectangular plate structure, which is used as a mounting base for the dielectric rod 2 .

[0076] Specifically, a plurality of dielectric rod mounting holes 3 - 1 are provided on the dielectric rod fixing substrate 3 , and the dielectric rod 2 is fixedly mounted in the dielectric rod mounting holes 3 - 1 by welding or bonding.

[0077] Specifically, the dielectric rod fixing substrate 3 adopts a LY-12 hard aluminum structure substrate as a carrier for carrying the dielectric rod 2, and is used for an antenna plate structure equivalent to a real phased array radar antenna.

[0078] Specifically, a plurality of dielectric rod mounting holes 3 - 1 are arranged in an array on the dielectric rod fixing substrate 3 , and a plurality of dielectric rods 2 are installed in an array on the dielectric rod fixing substrate 3 for simulating an array antenna.

[0079] Specifically, the back surface of the dielectric rod fixing substrate 3 is in contact with the front surface of the phase shifter fixing device 5 , and the two are fixedly connected.

[0080] In the present invention, the dielectric rod fixing substrate 3 is a hollow metal substrate structure, made of hard aluminum, with a thickness of 10 mm. The main array surface of the dielectric rod fixing substrate 3 has dielectric rod mounting holes 3-1 with a diameter of 17 mm, the center spacing of the dielectric rod mounting holes 3-1 is 36 mm, and there are 16 rows and 16 columns of dielectric rod mounting holes 3-1, with a total of 256 holes; its main function is to fix and protect the dielectric rod 2.

[0081] like Figure 6 As shown, the phase shifter fixing device 5 includes: a first substrate 5-1 and a second substrate 5-2, which are used to fix the phase shifter 4; specifically, the phase shifter 4 is fixedly installed between the first substrate 5-1 and the second substrate 5-2, and multiple phase shifters 4 are arranged in parallel.

[0082] Furthermore, the first substrate 5-1 and the second substrate 5-2 of the phase shifter fixing device 5 are both made of hard aluminum. The two substrates of the phase shifter fixing device 5 serve as a protective support structure for the phase shifter 4; the thickness of the first substrate 5-1 and the second substrate 5-2 are both 5 mm.

[0083] Furthermore, through holes with a diameter of 14 mm are provided on the array surfaces of the first layer substrate 5 - 1 and the second layer substrate 5 - 2 , and the through holes are used to fix the phase shifter 4 .

[0084] Specifically, the ammunition 10 to be tested is placed on an ammunition rack 1.5 meters above the ground; the heights of the antenna equivalent target 20 , the velocity measuring target 30 and the displacement sensor 40 are equal to the height of the ammunition 10 to be tested.

[0085] like Figure 7 As shown, the phase shifter 4 includes: a metal support structure 4-1 and a magnetic rod unit 4-2.

[0086] Specifically, the metal support structure 4-1 is a cylindrical tube-sleeve structure as a whole, the magnetic rod unit 4-2 is a cylindrical structure as a whole, and the magnetic rod unit 4-2 is sleeved inside the metal support structure 4-1 and fixedly connected to the metal support structure 4-1.

[0087] Specifically, the metal support structure 4 - 1 is made of aluminum; the magnetic rod unit 4 - 2 adopts a graphite rod structure.

[0088] Specifically, the two ends of the metal support structure 4-1 of the phase shifter 4 are fixedly connected to the first substrate 5-1 and the second substrate 5-2, respectively. The present invention makes the phase shifter of the real phased array radar antenna equivalent to a metal support device embedded with a magnetic rod unit 4-2, the size of the magnetic rod unit 4-2 is Φ10mm×100mm, and the magnetic rod unit is fixed to the first substrate 5-1 and the second substrate 5-2 with epoxy resin glue.

[0089] In the present invention, the phase shifter 4 in the antenna equivalent target 20 is used to be equivalent to the array element structure in a real antenna.

[0090] Furthermore, a circuit board 6 is installed on the back side of the second layer substrate 5 - 2 of the phase shifter fixing device 5 , and the circuit board 6 is used for the circuit structure equivalent to a real radar antenna.

[0091] Furthermore, the antenna cover 1 and the phase shifter fixing device 5 are connected and fixed by connecting screws 7; preferably, the connecting screws 7 are of M6 size, and the connecting screws 7 are used to fix the antenna cover 1, the first layer substrate 5-1 and the second layer substrate 5-2; the antenna equivalent target 20 of the present invention is fixed into a whole by connecting screws 7, which is convenient for use in evaluating the power of ammunition.

[0092] Example 2

[0093] A specific embodiment of the present invention provides a method for evaluating the destructive power of anti-radiation ammunition, using the test system for evaluating the destructive power of anti-radiation ammunition described in Example 1; comprising the following steps:

[0094] Step S1: Building the test system for evaluating the destructive power of anti-radiation ammunition;

[0095] Step S2: detonating the ammunition to be tested 10 to perform an anti-radiation ammunition damage test; after the test is completed, collecting damage data of the antenna equivalent target 20;

[0096] Step S3: According to the damage data of the antenna equivalent target 20, a phased array radar antenna model before and after damage is established; according to the antenna performance parameters obtained by simulation, the maximum detection distance R of the phased array radar antenna before and after damage is analyzed and calculated. max and R dmax ; The antenna model of the phased array radar before and after damage is as follows Fig. 9, Fig.11 shown.

[0097] Step S4: Calculate the damage probability P of the ammunition 10 to the phased array radar antenna at different killing distances, and evaluate the functional damage to the target antenna; obtain the relationship between the damage power E of the ammunition 10 to be tested and its action radius r within the damage range.

[0098] Furthermore, in step S1, the steps of setting up the test system are as follows:

[0099] Step S11: installing and manufacturing the antenna equivalent target 20.

[0100] Specifically, the installation sequence of the antenna equivalent target 20 is:

[0101] First, a plurality of phase shifters 4 are installed and fixed between the first substrate 5-1 and the second substrate 5-2 of the phase shifter fixing device 5;

[0102] Then, a plurality of dielectric rods 2 are installed and fixed in the dielectric rod installation holes 3 - 1 of the dielectric rod fixing substrate 3 ;

[0103] Finally, the antenna cover 1, the dielectric rod fixing substrate 3, the first layer substrate 5-1 and the second layer substrate 5-2 are arranged in sequence; and the antenna cover 1, the dielectric rod fixing substrate 3, the first layer substrate 5-1 and the second layer substrate 5-2 are connected by connecting screws 7. After the connection, the distance between the antenna cover and the dielectric rod fixing substrate 3 is 27 mm, the dielectric rod fixing substrate 3 is tightly fitted with the first layer substrate 5-1, and the distance between the first layer substrate 5-1 and the second layer substrate 5-2 is 90 mm.

[0104] Step S12: Place the ammunition 10 to be tested on an ammunition rack 1.5 m above the ground, and arrange multiple antenna equivalent targets 20 circumferentially with the ammunition 10 to be tested as the center of the circle; illustratively, three groups of antenna equivalent targets 20 are arranged on the circumference at radii of 3 m, 4 m, and 5 m, respectively, and the two antenna equivalent targets 20 in each group are arranged symmetrically at 180°. Specifically, the center of the antenna equivalent target 20 is 1.5 m from the ground.

[0105] Step S13: a displacement sensor 40 is set on each antenna equivalent target 20 in the direction facing away from the ammunition 10 to be tested; the displacement sensor 40 is a micro laser displacement sensor. Specifically, the displacement sensor 40 sets three measuring points on the back of the target plate of the antenna equivalent target 20 to measure the deformation of the target plate.

[0106] Step S14: four groups of velocity measuring targets 30 are arranged at intervals of 90° in the circumferential direction of the ammunition 10 to be tested; the multiple velocity measuring targets 30 in one group are arranged in sequence according to the distance along the radial direction of the ammunition 10 to be tested. Specifically, three velocity measuring targets 30 are arranged in one group, and the three velocity measuring targets 30 are respectively arranged at intervals of 3m, 4m, and 5m from the ammunition 10 to be tested; that is, Figure 1 As shown, the present invention symmetrically arranges 12 velocity measuring targets 30 at intervals of 90 degrees to measure the velocity of fragments.

[0107] Step S15: a circular outer barrier 50 is provided at the edge of the damage range of the ammunition 10 to be tested, so as to limit the damage range of the ammunition 10 to be tested and avoid accidental damage.

[0108] According to the damage element parameters of the ammunition, the present invention arranges the antenna equivalent target 20 within the effective killing range of the ammunition to be tested 10, and detonates the ammunition to be tested 10, so that the fragments formed produce a certain physical damage effect on the target. In the step S2, during the test, when the ammunition to be tested 10 is detonated, the test equipment is synchronously triggered to record relevant data. After the test is completed, the damage data on the antenna equivalent target 20 is counted.

[0109] Furthermore, in step S2, obtaining damage data of the antenna equivalent target 20 includes:

[0110] Step S21: recording the number of damages of the medium rod 2 and the phase shifter 4;

[0111] Step S22: recording the target plate deformation of multiple antenna equivalent targets 20 through the displacement sensor 40;

[0112] Step S23: Taking the center of the antenna equivalent target 20 as the origin, a rectangular coordinate system is established to count the coordinates of the damaged dielectric rod 2 and the phase shifter 4 on the antenna equivalent target 20, such as Figure 8 shown.

[0113] In the step S3, the dipole array element model of the radar antenna is established by electromagnetic simulation software, and an array consisting of 180 × 180 dipole array elements with a center distance of 10 cm is generated by programming, and the geometric center of the array is the coordinate origin. The transmission power of a single array element is 400W, the sidelobe level sll =-30, the minimum detectable signal is 30-13 W, the transmission signal frequency is 520 MHz, and the antenna loss is not considered. The antenna gain Gt before the phased array radar antenna is damaged is obtained by simulation analysis, and then the maximum detection distance Rmax before the radar antenna is not damaged is obtained.

[0114] In the present invention, by recording the number and distribution of damaged array elements in the target, simulation software is used to obtain the antenna radiation pattern after damage, and antenna performance indicators such as gain and detection distance are calculated.

[0115] Specifically, in step S3, after the damaged phased array radar antenna model is established, the antenna model in the damaged state is imported into the simulation software for analysis, and the directional pattern of the damaged phased array radar antenna is obtained through simulation analysis, such as Fig.10 shown.

[0116] Specifically, in step S3, the damaged phased array radar antenna model is constructed in the following manner:

[0117] Step S31: constructing the main structure of the antenna model according to the target plate deformation of the antenna equivalent target 20 measured by the displacement sensor 40;

[0118] Step S32: Determine the remaining number and position of the dielectric antenna module in the antenna model according to the damaged number and position of the dielectric rods 2 recorded in the step S2; specifically, the number and position of the dielectric rods 2 in the antenna model is the number of dielectric rods 2 in the initial state of the phased array radar antenna minus the corresponding number and position of damaged dielectric rods 2.

[0119] Step S33: Determine the number and positions of the phase shifter units in the antenna model according to the number and positions of the damaged phase shifters 4 recorded in step S2.

[0120] Step S34: According to the target plate deflection of the antenna equivalent target 20, the damage data of the dielectric rod 2 and the phase shifter 4 obtained after the test, the coordinates of all the array elements that have not been destroyed are determined, and they are input into the electromagnetic simulation software to generate the phased array radar antenna model after the damage of the anti-radiation ammunition, such as Fig.11 shown.

[0121] Furthermore, in step S3, electromagnetic simulation software is used to establish models of the phased array radar antenna before and after being damaged, and then the directional diagrams of the radar antenna and the antenna equivalent target after being damaged are obtained through software calculation, and verified by measuring the circuit board 6.

[0122] Furthermore, in step S3, according to the antenna gain G t Calculate the maximum detection range R of phased array radar antenna max ; Maximum detection distance R max It is expressed as:

[0123] ,

[0124] Where: Pt is the peak transmit power; Gt is the antenna gain; λ is the signal wavelength; σ is the target cross-sectional area; Ni is the receiver input noise power; Fn is the receiver noise factor; (S / N)o min is when the radar detection threshold is equal to the minimum output signal-to-noise ratio of the radar receiver; when the type of target radar is determined, the physical damage of anti-radiation ammunition to the phased array radar only brings about the change of Gt, and other parameters are determined according to the type of phased array radar antenna. When the type of radar target is determined, physical damage can only bring about Gt. t Therefore, the maximum detection distance R of the damaged antenna can be calculated based on the directional diagram obtained by the above simulation. dmax .

[0125] Furthermore, in step S3, the antenna gain G of the phased array radar antenna before and after damage can be known according to the radiation pattern. t , and then the maximum detection distance R of the radar in the initial state can be calculated max And the maximum detection distance after damage R dmax .

[0126] Specifically, in step S3, the antenna gain G of the damaged phased array radar antenna can be known according to the radiation pattern. t , and calculate the maximum detection distance R after damage dmax ; The damage probability P is the ratio of the maximum detection distance of the radar antenna after damage to the maximum detection distance before damage, that is, P=R d max / R max .

[0127] Furthermore, in step S4, the detection distance is analyzed according to the antenna technical parameters obtained by simulation, the damage probability of the anti-radiation ammunition warhead is calculated, and the functional damage assessment of the antenna target is completed.

[0128] In a specific embodiment of the present invention, in step S4, the damage power of the ammunition to be tested 10 is set to be uniform in the circumferential direction; according to the damage test results of the antenna equivalent target 20 at different positions, the damage probability P=R of the radar antenna at different killing distances r is calculated. dmax / R max According to the damage probability P corresponding to different distances r between the phased array radar antenna and the ammunition to be tested 10, a damage probability curve at different killing distances, i.e., a P(r) curve, is obtained. Specifically, the damage power E of the ammunition to be tested 10 within the damage range is calculated according to the P(r) curve.

[0129] Calculate the power of anti-radiation ammunition in a two-dimensional (circumferential and radial) power field. Under the conditions of the circumferential and radial two-dimensional power field, the damage power of the ammunition to be tested is set to be uniform in the circumferential direction. The calculation model of the damage power E is:

[0130] ,

[0131] Where: P(r) is the damage probability of the radar with a distance r from the ammunition to be tested (10); r is the fragmentation effect radius of the ammunition to be tested 10. The damage power E of the anti-radiation ammunition reflects the relationship between the damage probability P and the distance r from the phased array radar antenna to the ammunition to be tested 10. The present invention evaluates the damage power of the anti-radiation ammunition to the radar antenna target by calculating the damage power E of the ammunition to be tested 10 within the damage range.

[0132] In another specific embodiment of the present invention, multiple antenna equivalent targets 20 are staggered in the three-dimensional space around the ammunition to be tested 10, so that the destructive power E of the anti-radiation ammunition in the three-dimensional force field (with the position of the ammunition to be tested 10 as the origin and x, y, z as coordinates) can be calculated; according to the damage probability P corresponding to the different coordinates (x, y, z) of the phased array radar antenna and the ammunition to be tested 10, the damage probability curve under different coordinates, i.e., the P (x, y, z) curve, is obtained.

[0133] The mathematical description of the destructive power E of anti-radiation ammunition in a three-dimensional force field is:

[0134] ,

[0135] Where: P(x, y, z) is the probability of target damage at point (x, y, z) in the force field.

[0136] In the present invention, the destructive power E is calculated by the method of step 4. The destructive power E comprehensively considers the destructive effect of the full power field and the target in the power field, and can quantitatively describe the level of the comprehensive power of the anti-radiation ammunition warhead according to the size of the destructive power E, so it can be used to evaluate the comprehensive destructive power of anti-radiation ammunition. Further, according to the above method, different types of anti-radiation ammunition can be tested repeatedly to conduct destructive power comparison analysis to provide a basis for the combat use of the warhead. By comparing the antenna equivalent target damage test results of different ammunition warheads, the destructive capabilities of different anti-radiation ammunition on phased array radar antenna targets are analyzed, and the comprehensive destructive power of anti-radiation ammunition can be quantitatively evaluated.

[0137] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for evaluating the destructive power of anti-radiation ammunition, characterized in that: Adopt a test system to evaluate the destructive power of anti-radiation munitions; The test system for evaluating the destructive power of anti-radiation ammunition comprises: ammunition to be tested (10), an antenna equivalent target (20), a velocity measurement target (30) and a displacement sensor (40); The ammunition to be tested (10) is located in the center of the test system; The antenna equivalent target (20), the velocity measuring target (30) and the displacement sensor (40) are arranged around the ammunition to be tested (10); The antenna equivalent target (20) comprises: a radome (1), a dielectric rod (2), a dielectric rod fixing substrate (3), a phase shifter (4) and a phase shifter fixing device (5); the radome (1), the dielectric rod fixing substrate (3) and the phase shifter fixing device (5) are parallel to each other and arranged at intervals; a plurality of dielectric rods (2) are arranged on a side of the dielectric rod fixing substrate (3) facing the radome (1), and the dielectric rods (2) are used to simulate a single antenna structure of a phased array radar antenna; the phase shifter (4) is fixedly mounted on the phase shifter fixing device (5), and the phase shifter (4) is used to be an array element structure of an equivalent phased array radar antenna; The velocity measuring target (30) is used to test the fragment velocity of the ammunition to be tested (10); the displacement sensor (40) is arranged on the back of the antenna equivalent target (20); the displacement sensor (40) is used to measure the deformation of the antenna equivalent target (20); The method for evaluating the destructive power of anti-radiation ammunition comprises the following steps: Step S1: Building the test system for evaluating the destructive power of anti-radiation ammunition; Step S2: detonating the ammunition to be tested (10) to perform an anti-radiation ammunition damage test; after the test is completed, collecting damage data of the antenna equivalent target (20); Step S3: Based on the damage data of the antenna equivalent target (20), a phased array radar antenna model before and after damage is established; based on the antenna performance parameters obtained by simulation, the maximum detection distance R of the phased array radar antenna before and after damage is analyzed and calculated. max and R dmax ; Step S4: calculating the damage probability P of the ammunition to be tested (10) to the phased array radar antenna at different killing distances, and evaluating the functional damage to the target antenna; obtaining the relationship between the damage power E of the ammunition to be tested (10) and its action radius r within the damage range.

2. The method for evaluating the destructive power of anti-radiation ammunition according to claim 1, characterized in that: The phase shifter fixing device (5) comprises: a first layer substrate (5-1) and a second layer substrate (5-2), the phase shifter (4) being fixedly mounted between the first layer substrate (5-1) and the second layer substrate (5-2), and a plurality of phase shifters (4) being arranged in parallel.

3. The method for evaluating the destructive power of anti-radiation ammunition according to claim 2, characterized in that: At least three groups of antenna equivalent targets (20) are arranged in the circumferential direction of the ammunition to be tested (10); the three groups of antenna equivalent targets (20) are respectively arranged on circles with different radii and the ammunition to be tested (10) as the center; the distance between two antenna equivalent targets (20) in the same group and the ammunition to be tested (10) is equal, and the circumferential interval between the two antenna equivalent targets (20) in the same group is 180°; the distance between different groups of antenna equivalent targets (20) and the ammunition to be tested (10) is different, and they are staggered along the circumferential direction of the ammunition to be tested (10); Four groups of the velocity measuring targets (30) are arranged at intervals of 90 degrees along the circumferential direction of the ammunition to be tested (10); a plurality of velocity measuring targets (30) in each group are arranged at equal intervals along the radial direction of the ammunition to be tested (10).

4. The method for evaluating the destructive power of anti-radiation ammunition according to claim 3, characterized in that: In the step S2, obtaining damage data of the antenna equivalent target (20) includes: Step S21: recording the number of damaged phase shifters (4); Step S22: recording the deformation amounts of the plurality of antenna equivalent targets (20) by means of a displacement sensor (40); Step S23: establishing a rectangular coordinate system with the center of the antenna equivalent target (20) as the origin, and calculating the coordinates of the damaged phase shifter (4) on the antenna equivalent target (20).

5. The method for evaluating the destructive power of anti-radiation ammunition according to claim 4, characterized in that: In step S3, after the damaged phased array radar antenna model is established, the antenna model in the damaged state is imported into the simulation software for analysis, and the directional pattern of the damaged phased array radar antenna can be obtained through simulation analysis.

6. The method for evaluating the destructive power of anti-radiation ammunition according to claim 5, characterized in that: In step S3, according to the antenna gain G t Calculate the maximum detection range R of phased array radar antenna max ; Maximum detection distance R max It is expressed as: ， Where: P t is the peak transmit power; G t is the antenna gain; λ is the signal wavelength; σ is the target cross-sectional area; N i is the receiver input noise power; F n is the receiver noise factor; (S / N) o min When the radar detection threshold is equal to the minimum output signal-to-noise ratio of the radar receiver; According to the radiation pattern, the value of the antenna gain Gt of the phased array radar antenna before and after damage can be known, and the maximum detection range R before and after damage can be calculated. max and R dmax。 7. The method for evaluating the destructive power of anti-radiation ammunition according to claim 6, characterized in that: In step S4, the damage probability P is the ratio of the maximum detection distance of the radar antenna after damage to the maximum detection distance before damage, that is, P=R d max / R max .

8. The method for evaluating the destructive power of anti-radiation ammunition according to claim 7, characterized in that: In the step S4, damage probability curves at different killing distances, i.e., P(r) curves, are obtained according to the damage probability P corresponding to different distances r between the phased array radar antenna and the ammunition to be tested (10); the damage power of the ammunition to be tested (10) is set to be uniform in the circumferential direction; and the damage power E of the ammunition to be tested (10) within the damage range is calculated according to the P(r) curve. The calculation model of the damage power E is: ， Wherein: P(r) is the damage probability of a radar antenna whose distance from the munition to be tested (10) is r; r is the fragmentation action radius of the munition to be tested (10).

9. The method for evaluating the destructive power of anti-radiation ammunition according to claim 8, characterized in that: In the step S4, the position of the ammunition to be tested (10) is taken as the origin; according to the damage probability P corresponding to the antenna equivalent target (20) of the phased array radar antenna and the different coordinates (x, y, z) of the ammunition to be tested (10), a damage probability curve corresponding to different coordinate positions, i.e., a P (x, y, z) curve, can be tested and obtained; according to the P (x, y, z) curve, the damage power E of the ammunition to be tested (10) within the damage range of the anti-radiation ammunition in the three-dimensional power field is calculated, and the calculation model of the damage power E is: ， Where: P(x, y, z) is the probability of target damage at point (x, y, z) in the force field.

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