Airborne multipoint source infrared jamming bomb efficiency simulation method

Abstract

The invention relates to an analogue simulation method for a multi-point source infrared jamming bomb, which comprises the following steps of: respectively constructing models according to the number i (i = 1, 2... N) of grains of the multi-point source infrared jamming bomb, and constructing a radiation model of each grain according to the number and radiation characteristics of the grains of the multi-point source infrared jamming bomb, according to the physical and chemical characteristics of each grain of the multipoint source infrared jamming bomb and the throwing environment parameters, the motion model of each grain is constructed, and the simulation parameters of the infrared jamming bomb are obtained by combining the airplane characteristic parameters, the throwing modes and the models in A and B. In a word, the jamming efficiency simulation model of the jamming bomb is established, the simulation efficiency of the jamming bomb is improved, and the simulation efficiency of the jamming bomb is improved. The system supports the access of a comprehensive self-defense confrontation simulation system, calculates the speed, position and radiation intensity information of the multi-point source infrared jamming bomb in real time, and has the advantages of good simulation effect and strong anti-interference capability.

Description

Technical Field

[0001] The invention belongs to the technical field of computer simulation for launching aircraft interference objects, and in particular relates to a simulation method for multi-point source infrared interference bombs. Background Art

[0002] The intensification of local conflicts around the world has made the battlefield environment increasingly complex. The biggest consumption on the battlefield is weapons and equipment. Maximizing the integrity of equipment is an effective way to reduce war consumption. The main threat faced by aircraft during the mission is the threat of incoming missiles. Airborne infrared decoys are infrared jammers used to create false infrared targets. They can be launched from aircraft to deceive ground-to-air, air-to-air, and air-to-ground missiles, causing them to break away from tracking and aiming at the target, thereby achieving the purpose of protecting the target. It has a simple structure, low cost, and can be deployed in large quantities in a short period of time, causing strong interference. It is currently one of the main means to counter infrared guided missiles.

[0003] In order to better adapt to the complex combat environment, the jamming technology of infrared jammers is also constantly developing, including multi-point source infrared jammers represented by fireworks point source jammers with different radiation energy and size. So far, the simulation of infrared jammers is mainly based on single-point source infrared jammers. There are many problems in the use process, including the shortcomings of low efficiency and weak jamming ability of single-point source infrared jammers. At the same time, although there are some multi-point source infrared jammers at present, there is no simulation method for the effectiveness of multi-point source infrared jammers. Therefore, it is impossible to simulate the multi-point source infrared jammers during use, which limits the daily experiments and actual use of multi-point source infrared jammers. Therefore, a simulation method for multi-point source infrared jammers is urgently needed to solve the above-mentioned problems. Summary of the invention

[0004] The invention provides a simulation method for multi-point source infrared jamming bombs to solve the technical problem of the lack of simulation method for the jamming effectiveness of multi-point source jamming bombs.

[0005] In order to achieve the above technical objectives, the specific technical solutions adopted by the present invention are:

[0006] A simulation method for multi-point source infrared jamming bombs includes the following steps:

[0007] S1. Construct models according to the number of multi-point source infrared jamming ammunition columns i (i = 1, 2...N);

[0008] S2. Construct the radiation model of each charge according to the number and radiation characteristics of the charge of the multi-point source infrared jammer;

[0009] S3. Constructing the motion model of each charge according to the physical and chemical characteristics of each charge of the multi-point source infrared jammer and the release environment parameters;

[0010] S4. Combine the aircraft characteristic parameters, delivery method and the models in A and B to obtain the simulation parameters of the infrared jammer.

[0011] Furthermore, the number of infrared jamming ammunition cartridges in step S1 is N, and the characteristics of cartridges 1, 2, ... N include the radiation band and the infrared radiation intensity W of the band in which they are located. bi , formation time t b0 and duration t b .

[0012] Furthermore, in step S1, the measured static radiation intensity is used to select characteristic time points of the aircraft at different altitudes and speeds, and the cubic spline function is used for difference to obtain a fitting curve of the infrared radiation intensity of a single grain column, thereby obtaining a radiation intensity model of the corresponding grain column. The formula for the fitting curve of the infrared radiation intensity of a single grain column is:

[0013] W λ =a×t 3 +b×t 2 +c×t+d

[0014] Among them, W λ is the radiation intensity of the jammer at wavelength λ, t is the jammer release time, and a, b, c, d are the coefficients obtained by fitting according to the measured values.

[0015] Furthermore, the physical and chemical properties of the infrared jammer in step S3 include the size W of each charge column. f ×L f ×H f 、Weight of each drug column Initial velocity Drag coefficient c, mass combustion rate The launch environment parameters include the altitude H of the carrier aircraft;

[0016] The formula for the acceleration of each charge column is:

[0017]

[0018] The calculation formula of the air resistance of the grain column is:

[0019]

[0020] Where ρ is the maximum air density, and the calculation formula for the maximum air density is:

[0021] ρ=P÷(0.2869×(T+273.1))

[0022] The aircraft altitude is below 11,000 meters, and the calculation is as follows

[0023] T=15.04-0.00649×H

[0024] P=101.29×((T+273.1)÷288.08) 5.256

[0025] The aircraft altitude is between 11,000 and 25,000 meters, and the calculation is as follows

[0026] T=-56.46

[0027] P = 22.65 × e( 1 .73-0 .000157×H )

[0028] Where s is the resistance force area, and the resistance area of ​​each surface is based on the size of the column W f ×L f ×H f Calculated as

[0029] s x =L f ×H f

[0030] s y =W f ×H f

[0031] s z =W f ×L f

[0032] Bait formation stage The calculation formula of resistance is

[0033]

[0034] Bait stable movement stage The calculation formula of resistance is

[0035]

[0036] where g is the acceleration due to gravity.

[0037] Furthermore, the carrier aircraft characteristic parameters in step S3 include the carrier aircraft speed V and the installation angle θ of the delivery device on the aircraft. P ;

[0038] After the multi-point source infrared jammer is released, different charge columns will explode to form different infrared radiation sources. According to the measured distribution, the release angle of each point is calculated when calculating its speed.

[0039] Furthermore, the initial velocity of each charge column at the time of launching the multi-point source infrared jammer is

[0040]

[0041] Where V e The three components of the aircraft's velocity in the geographic system at the time of launch.

[0042] Furthermore, the real-time velocity and position are calculated by the simulation step length t s The real-time speed of the decoy bomb is calculated during the simulation process. for

[0043]

[0044] Real-time location for

[0045]

[0046] The calculated speed and position are the speed and position in the geographic system, wherein the acceleration is obtained by the calculation formula of the drug column acceleration in step S4, and the position and speed information in other coordinate systems can be obtained by coordinate system conversion.

[0047] By adopting the above technical solution, the present invention can also bring the following beneficial effects:

[0048] 1. The present invention provides a simulation method for multi-point source infrared jammers. By establishing a jammer jamming effectiveness simulation model, the present invention supports access to a comprehensive self-defense confrontation simulation system, and calculates the speed, position, and radiation intensity information of multi-point source infrared jammers in real time. The method is used to solve the modeling problem of multi-point source infrared jammer objects in comprehensive self-defense confrontation, and realize the real-time state simulation of infrared jammers under different multi-point source infrared jammer delivery parameter conditions in the simulation confrontation.

[0049] 2. The present invention mentions a simulation method for multi-point source infrared jamming bombs, which can improve the effectiveness of jamming bombs when facing the enemy's anti-jamming measures, contribute to the research of anti-jamming capabilities, facilitate the coordinated operations of different combat platforms by building models, and is committed to the research of more efficient coordinated defense combat mechanisms. It combines scene simulations of different platforms and incoming threats to make the jammer delivery program more flexible and more defensively targeted, thereby improving the survivability of the combat platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 The present invention discloses a flow chart of a simulation method for multi-point source infrared jamming bombs. DETAILED DESCRIPTION

[0052] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0053] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0054] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present invention, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0055] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0056] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0057] Example 1

[0058] In one embodiment of the present invention, see Figure 1 The present invention provides a simulation method for multi-point source infrared jamming bombs, which comprises the following steps:

[0059] According to the number of charge columns of multi-point source infrared jammers, the model of each charge column is constructed respectively;

[0060] The infrared radiation model is fitted according to the measured value of the charge i (i=1,2...N);

[0061] Construct a motion model based on the physical and chemical characteristics of the charge i (i = 1, 2...N) and the release environment parameters;

[0062] Combined with the aircraft characteristic parameters, the simulation parameters of the multi-point source infrared jammer are obtained.

[0063] The specific implementation method is as follows:

[0064] 1. Assume that a certain multi-point source infrared jammer has three charge columns, which are represented by P1, P2, and P3. Take P1 as an example to explain the calculation of the relevant model. The radiation wavelength range of P1 is 3μm~5μm and 8μm~14μm. The size of P1 is set to 20×50×50mm, and the weight is Initial velocity Drag coefficient c = 1.0, mass combustion rate The release environment parameters include the carrier aircraft altitude H = 8000m, the aircraft speed at the time of release Installation angle θ of the equipment released on the aircraft P =90°, release time position The radiation intensity model is obtained by using the measured static radiation intensity and fitting based on the measured data difference

[0065] W 3～5μm =a1×t 3 +b1×t 2 +c1×t+d1

[0066] W 8～14μm =a1×t 3 +b1×t 2 +c1×t+d1

[0067] The obstructed area of ​​P1 is calculated as

[0068]

[0069]

[0070]

[0071] The calculation method of atmospheric density at altitude is as follows:

[0072] P=101.29×((-36.88+273.1)÷288.08) 5.256 =35.6877

[0073] Atmospheric density ρ = 35.6877 ÷ (0.2869 × (-36.88 + 273.1)) = 0.5266

[0074] According to the measured distribution (here assumed), when calculating its speed, the P1 launch angle is

[0075] The speed of the drug column P1 is

[0076]

[0077] Air resistance of the charge P1 during the decoy formation stage for

[0078]

[0079] The acceleration is

[0080]

[0081] The real-time speed and position are calculated in each cycle in the simulation according to the above formula.

[0082] The air resistance of the charge P1 during the stable motion phase for

[0083]

[0084] The acceleration is

[0085]

[0086] The real-time speed and position are calculated in each cycle in the simulation according to the above formula.

[0087] Through the above method, the radiation model and motion model of each charge are calculated respectively, and the parameter information of each charge of the multi-point source jammer is obtained in real time during the actual simulation process, so as to simulate the multi-point source infrared jammer realistically.

[0088] At the same time, in the actual flight process, the flight altitude has a certain influence on the radiation intensity and burning time of the jammer, and environmental factors such as weather factors, such as humidity, temperature, wind speed, cloud cover, visible range, etc. The process of the infrared radiation characteristics of the target and the background being transmitted through the atmosphere to the infrared seeker is also very complicated, and different atmospheric environments also have a great influence on the radiation characteristics of the infrared jammer. In short, the present invention establishes a jammer jamming effectiveness simulation model, supports access to the comprehensive self-defense confrontation simulation system, and calculates the speed, position and radiation intensity information of the multi-point source infrared jammer in real time, which is used to solve the modeling problem of the multi-point source infrared jammer object in the comprehensive self-defense confrontation, and realizes the real-time state simulation of the infrared jammer under the conditions of different multi-point source infrared jammer delivery parameters in the simulation confrontation, which has the advantages of good simulation effect and strong anti-interference ability.

[0089] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A simulation method for multi-point source infrared jamming bombs, characterized in that: The following steps are involved: S1. Construct models according to the number of multi-point source infrared jamming ammunition columns i (i = 1, 2...N); S2. Construct the radiation model of each charge according to the number and radiation characteristics of the charge of the multi-point source infrared jammer; S3. Constructing the motion model of each charge according to the physical and chemical characteristics of each charge of the multi-point source infrared jammer and the release environment parameters; S4. Combine the aircraft characteristic parameters, delivery method and the models in A and B to obtain the simulation parameters of the infrared jammer.

2. A simulation method for multi-point source infrared jamming bombs according to claim 1, characterized in that: The number of infrared jamming ammunition cartridges in step S1 is N, and the characteristics of cartridges 1, 2, ... N include the radiation band and the infrared radiation intensity W of the band in which they are located. bi , formation time t b0 and duration t b .

3. A simulation method for multi-point source infrared jamming bombs according to claim 2, characterized in that: In step S1, the measured static radiation intensity is used to select characteristic time points of the aircraft at different altitudes and speeds, and the cubic spline function is used for difference to obtain a fitting curve of the infrared radiation intensity of a single drug column, thereby obtaining a radiation intensity model of the corresponding drug column. The formula for the fitting curve of the infrared radiation intensity of a single drug column is: W λ =a×t 3 +b×t 2 +c×t+d Among them, W λ is the radiation intensity of the jammer at wavelength λ, t is the jammer release time, and a, b, c, d are the coefficients obtained by fitting according to the measured values.

4. A simulation method for multi-point source infrared jamming bombs according to claim 1, characterized in that: The physical and chemical properties of the infrared jammer in step S3 include the size W of each charge column. f ×L f ×H f 、Weight of each drug column Initial velocity Drag coefficient c, mass burning rate The launch environment parameters include the altitude H of the carrier aircraft; The formula for the acceleration of each charge column is: The calculation formula of the air resistance of the grain column is: Where ρ is the maximum air density, and the calculation formula for the maximum air density is ρ = P ÷ (0.2869 × (T + 273.1)) The aircraft altitude is below 11,000 meters, and the calculation is as follows T=15.04-0.00649×H P=101.29×((T+273.1)÷288.08) 5.256 The aircraft altitude is between 11,000 and 25,000 meters, and the calculation is as follows T＝-56.46 P=22.65×e (1.73-0.000157×H) Where s is the resistance force area, and the resistance area of ​​each surface is based on the size of the column W f ×L f ×H f Calculated as s x =L f ×H f s y =W f ×H f s z =W f ×L f Bait formation stage The calculation formula of resistance is Bait stable movement stage The calculation formula of resistance is where g is the acceleration due to gravity.

5. The simulation method for multi-point source infrared jamming bombs according to claim 4 is characterized in that: The carrier characteristic parameters in step S3 include the carrier speed V and the installation angle θ of the delivery device on the aircraft. P ; After the multi-point source infrared jammer is released, different charge columns will explode to form different infrared radiation sources. According to the measured distribution, the release angle of each point is calculated when calculating its speed.

6. The simulation method for multi-point source infrared jamming bombs according to claim 5 is characterized in that: The initial velocity of each charge column at the time of multi-point source infrared jammer release is Where V e The three components of the aircraft's velocity in the geographic system at the time of launch.

7. The simulation method for multi-point source infrared jamming bombs according to claim 6 is characterized in that: The real-time speed and position are calculated by the simulation step length t s The real-time speed of the decoy bomb is calculated during the simulation process. for Real-time location for The calculated speed and position are the speed and position in the geographic system, wherein the acceleration is obtained by the calculation formula of the drug column acceleration in step S4, and the position and speed information in other coordinate systems can be obtained by coordinate system conversion.

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