Authors

Key words:

aerial robotic technic, multipath phased antenna array, partial radio channel, information transmission system, power allocation algorithm, mathematical model of radio channel redistribution

Annotation:

An approach is intended to develop an algorithm for redistributing radio channels formed by a multipath phased antenna array of an aerial robotic technic in order to provide considerably excellent performance while using information transmission system in different situations. The approach eliminates the power fluctuations of the used radio channel in conditions of deliberate interference and reduces the likelihood of bit error rate. The key solution of the problem is based on the determining the condition when simultaneous disconnecting radio channels prevents their parameters go beyond the limits of the information transmission system, maintaining without changing the amplification factors of the antenna array and proportionate redistribution of the released power between partial radio channels. Analytical expressions of indicators for algorithm synthesis using mathematical and simulation modeling are given.

Pages3-8

Code UDC:623.74

Authors

Key words:

active phased array antenna, dissipative medium, absorbing half-space, shortening coefficient, wave resistance, propagation coefficient

Annotation:

The article considers the basic emitter of an active phased array antenna array, which uses conductors with different insulation thicknesses located underground. The properties of reflection and penetration of electromagnetic waves at the interface of media with different refractive indices make it possible to determine the appropriate location of underground antennas, find directional characteristics and evaluate the influence of various factors on their effectiveness. The complex of wave phenomena associated with attenuation in the surrounding dissipative medium, reflection and refraction at the interface distinguishes this class of antennas by significant absorption in the ground. The article also considers the limiting case of placing the base emitter at the interface of media.

Pages9-14

Code UDC:621.396

Authors

Key words:

two-link tracked vehicle, uneven flow velocity, seawater, total pressure, damaged hull

Annotation:

The article describes the movement of a two-link tracked vehicle (TGM) afloat with a damaged hull as a result of the use of weapons by the enemy. Such dependences influencing the overcoming of a river with a damaged hull are presented and disclosed, such as the unevenness of the river flow velocity, the intake of seawater through damage to the machine body. A description of the flow of water into the body of the DGM with a device for protection against water penetration into the body of damaged military equipment and the procedure for calculating the crossing of the river by a car with a damaged body and the flow of water into it using a protection device are presented.

Pages15-19

Code UDC:623.43.01

Authors

Key words:

Monitoring methods, monitoring, primary string transducer, string vibration amplitude, stress-strain state, secondary equipment

Annotation:

The article is devoted to the method of recording the maximum values of the parameters of the stress-strain state of building structures, which can be implemented in the monitoring of objects of ground-based space infrastructure. The article presents the results of theoretical and experimental studies, showing the influence on the amplitude of the oscillations of the resonator of the primary converter of the parameters of the excitation pulses and the position of the electromagnetic excitation coil of the secondary equipment of the monitoring systems. It is proved that the approximation of the experimental values of the resonator oscillation frequency in a string transducer by a polynomial of the sixth degree gives the most accurate result. The proposed method makes it possible to evaluate the technical condition of building structures both by the current values of the stress-strain state parameters and by the maximum values under conditions of special loads and impacts.

Pages20-26

Code UDC:528.482

Authors

Key words:

survivability, stealth, reflection of radio waves, imitation of thermal radiation, repair and restoration organ, unmasking signs

Annotation:

In order to increase survivability, a comprehensive technique for increasing the survivability of repair and restoration organs was developed and described, based on hiding the true location of the repair and restoration unit as a result of the formation and issuance of false information about its actual location by reflecting radio waves and simulating thermal radiation. The complex methodology is based on the theory of assessing the security and survivability of objects and complexes, allows you to make micro-decisions on determining the most preferred options for placing and masking repair and restoration equipment, choosing the composition and the required number of sets of specialized devices that serve as a false target, their location.

Pages27-35

Code UDC:621.45.017

Authors

Key words:

queuing system, Pareto distribution, infocommunication system, approximation method

Annotation:

Abstract: The paper proposes an approach to the approximation of an arbitrary density of a random variable distribution by decomposing the original density function into a series of orthogonal functions with a finite number of terms. Considering that exponential functions are not orthogonal, the Gram-Schmidt method was used, which allows reproducing a set of orthonormal functions in the form of linear combinations of exponential functions. An example of approximation of the Pareto distribution density by two exponential densities with real and complex weight coefficients is considered. Numerical characteristics of a random variable for various approximable distribution density functions were obtained using the Matlab application software package.

Pages36-43

Code UDC:004.02

Authors

Key words:

unmanned aerial vehicle, effective scattering area, radar, characteristic, polarization, diagram

Annotation:

The radar characteristics of the most common commercial unmanned aerial vehicles (UAVs), which pose a threat to the objects of protection of the troops of the National Guard of the Russian Federation, had been considered in this article. The polar diagrams of the radar cross section (RCS) of a multicopter type UAV on the vertical and horizontal polarization of the microwave range, obtained as a result of measurements in a compact anechoic chamber, are presented. As a result, the presented radar characteristics confirmed that the average RCS of the UAV depends on the shape, size and of the materials used in the design, the wavelength and polarization of the radar radiation. An analysis of the results made it possible to conclude that the polar diagrams of the RCS of various devices have sharp differences, and the average RCS values of the considered UAVs do not exceed 0,1 m2.

Pages44-49

Code UDC:623.624

Authors

Key words:

detection, object of protection, security system, means of security alarm

Annotation:

The basic principles for the creation and use of remotely installed intruder alarms for the device of detection lines in the security system of important state facilities are considered. For this purpose, an increase in the efficiency of mobile rapidly deployable detection tools was analyzed by increasing their noise immunity by combining two detection tools, the operation of which is based on different physical principles of operation, as well as due to their rapid remote installation. A method for the remote installation of a combined security alarm and proposals for the use of remotely installed security alarms for arranging detection lines in the security system of important state facilities are given.

Pages50-54

Code UDC:621.317

Authors

Key words:

informational-technical effects, behavioral analysis, level of security, unauthorized access, randomization

Annotation:

The article considers the problem of justification of rational combination of different methods of assessment of the level of protection of automated systems of special purpose from information-technical impacts. The article offers an approach based on calculation of guaranteed probability of performance of the task with consideration of influence of random operational factors. In addition to security assessment methods based on offender behavioral analysis (testing of local and network traffic, simulation of attacks, simulating degradation of control and command channels using fuzzy logic) The method of assessment of the level of protection of ACCH on the basis of the algorithm of double randomization is developed. The developed algorithms take into account the dependence of the performance indicator on the moment of occurrence of events of the management cycle at the preparatory stage of operation of the target supersystem.

Pages55-61

Code UDC:685.5.011.56

Authors

Key words:

mini unmanned aerial vehicle (MBPLA), potentially dangerous object (POO), automatic machine-gun grenade launcher (AGS), mathematical expectation (MOG), random variables (SV), mean square deviations (SKO)

Annotation:

A simulation model is proposed for evaluating the effectiveness of the defeat of a mini unmanned aerial vehicle (UAV) when firing from automatic grenade launcher weapons. The advantages of the simulation method in comparison with the analytical method are shown. The probability of hitting a UAV (quadcopter) was estimated using the method of modeling the process of hitting a target with a fragmentation field, in a three-dimensional coordinate system. The total probability of hitting the quadcopter is calculated as the sum of the probabilities of hitting in three visible planes using the Solidworks software package. To solve the problem of determining the probability of damage to the most particularly important elements of the quadcopter, the finite element method was used. Programming is performed in the ANSYS program using the ADPL format and the Fortran programming language.

Pages62-72

Code UDC:623.746

Authors

Key words:

security, anti-ram device, vehicle, striking element, perforation of a pneumatic wheel tire

Annotation:

Ensuring controlled access to the territory of a protected facility is one of the main elements in the organization of a security system aimed at increasing protection from illegal acts, including terrorist acts. The effectiveness of the means of forced stopping of vehicles, designed to mechanically damage the wheels of cars and trucks with pneumatic tires, is determined by the main parameters of the striking elements. It is shown that in order to ensure the effective operation of such means, the diameters of the holes perforated by striking elements (for example, spikes) in the tires of vehicle wheels must be at least 7,0 mm.

Pages73-80

Code UDC:62-1; 62-52; 62-9

Authors

Key words:

telemetry information, group telemetry signal, cryptographic transformation, weapons and military equipment

Annotation:

The article is devoted to the current issues concerning the transmission of telemetry information over space radio lines in the conditions of information warfare. The features of transmission and closure of telemetric information in the BRS-4 and BRS-4M radio telemetry systems are considered. Based on the features of the structure of the group telemetry signal and the modes of information transmission in these radio telemetry systems, a method for protecting telemetry information by cryptographic transformation is proposed. At the same time, the work focuses on the process of encrypting telemetric information about rapidly changing processes. The method of protection of telemetric information developed by the authors can be applied in the justification and design of promising on-board radio telemetry systems.

Pages81-87

Code UDC:621.398:004.056.5

Authors

Key words:

barrier, anti-ram device, anti-ram barrier

Annotation:

Ensuring controlled access to the territory of a protected facility is one of the main elements in the organization of a security system aimed at increasing protection from illegal acts, including terrorist acts. The article presents the main parameters and characteristics of antiram barriers of barrier type, their composition and principle of operation. The purpose of the study is to justify the height of the power beam of the barrier above the surface of the road surface. As a result of the study, it was found that it is advisable to place the power beam at a height of at least 1100 mm above the road surface, while at least 30 % of the initial kinetic energy of the vehicle will be spent on plastic deformation of its elements.

Pages88-94

Code UDC:62-1; 62-52; 62-9

Authors

Key words:

Infrared radiation, spectrum, spectral characteristic, thermal imaging, noncooled thermal imaging equipment, range of vision, Jonson’s criterion, electrooptical equipment, multispectral systems

Annotation:

Total volume of publications concerning thermal imaging subject can be split in two parts: purely scientific packed with «multi-storey» formulas and wordings; and general knowledge-presenting the thermal imaging (TI) equipment as enhanced night vision technology or assigning it fantastic options. The paper is focused on familiarizing the reader with actual capabilities of modern domestic portable noncooled TI equipment concerning its comprehensive all-around-the clock & allweather «vision» ability. In fewer words outlined basic concepts concerning the infrared radiation and TI equipment. Advanced level of domestic electrooptical equipment for reconnaissance, surveillance and rescue operations, products’ features and functionality are demonstrated using example of «SPEKTR-AT» LLC products.

Pages95-106

Code UDC:535.33; 621.3

Authors

Key words:

artillery system, barrel, barrel heating, safety, artillery shot, firing mode, prediction of safety parameters

Annotation:

The information situation of assessing the condition and safe functioning of artillery guns and calculation numbers during firing is considered. A software implementation of the model of the thermal state of the barrel when firing a series of shots is presented. A model of thermal heating of a fuse as an inhomogeneous body is presented. The dynamics of supercritical heating of pyrotechnic and explosive substances included in the fuse was evaluated, while a method was used according to which the simulation of the heating of ammunition in the barrel channel is carried out by a constant level of the maximum reached heating temperature of its inner surface in a given section, fixed at the time of failure. The solution of the variational problem of forecasting the most optimal firing mode is presented.

Pages107-113

Code UDC:623.5

Authors

Key words:

barrage ammunition, mine, mortar, trajectory correction system

Annotation:

The design of 82 mm mortar rounds and methods of improving the accuracy of firing used in foreign-made mortar rounds are considered. The analysis of the design of barrage ammunition and the methods of their launch allowed us to conclude that it is possible to increase the accuracy of firing from a mortar by using ammunition with a combination of detection and target destruction modes. The use of this munition in places where the enemy equips defensive positions in residential settlements, and places where personnel are stationed in places where civilians live, will make it possible to detect the target, identify it and make a decision to destroy it, reducing the likelihood of collateral losses. The design scheme of this munition is proposed, its overall mass characteristics and efficiency are calculated.

Pages114-121

Code UDC:623.4.08

Authors

Key words:

armored clothing, armored panels, ultra-high-molecular-weight polyethylene (UHMWPE), import substitution, organoplastics, polymer composite materials, UHMWPE fiber production, UHMWPE fabric production, ballistic tests, RUSSIL, UHMWPE polyethylene production shop

Annotation:

The article analyzes the use of materials in armor protection, such as steel, aramid, ultrahigh molecular weight polyethylene and provides their characteristics. When comparing UHMWPE and aramid, it was concluded that the bulk of the parameters, in addition to resistance to high temperatures, viscosity and ultimate curl, are higher in UHMWPE. The method of production of UHMWPE fiber and UD materials is considered. The analysis of ballistic tests of blocks of soft and rigid structure is carried out. The domestic companies producing UHMWPE yarns and cloths are considered. The authors have established a linear relationship between the number of punched sheets and the speed of the striker. This indicates a mechanism in which a certain amount of momentum, not energy, is lost by the striker when one sheet of UD is penetrated, and where the loss of momentum of the striker does not depend on the speed of impact on the sheet of UD inside the package.

Pages122-128

Code UDC:623.445

Authors

Key words:

functional coverage, defect, failure, risk, technological system

Annotation:

The risk of failure of the functional coating of special-purpose equipment being put into operation quantitatively characterizes its safety. The probability of failure of the functional coating is due to its manufacturing defect. A three-stage methodology for assessing the production defectiveness of a functional coating has been developed, taking into account the danger of different types of defects. A methodology is proposed for assessing the risk level of failure of the functional coating of special-purpose equipment being put into operation according to its production defects and the level of production control. An expression is obtained for determining the time between the settings of the technological system according to the permissible probability of failure of the functional coating.

Pages129-136

Code UDC:678.019

Authors

Key words:

аctive experiments, geophysics, ionosphere, heating stands, radio wave propagation

Annotation:

Active impacts on the upper geospheres lead to a change in their physical condition. The purpose of this work is to form the main scientific and applied problems that are currently being solved and need to be solved in the near future when conducting active experiments in the upper geospheres. The paper presents special methods and tools used in active geophysical experiments, it is shown that these experiments can be used to solve a wide range of applied problems, including for assessing environmental consequences. The results obtained make it possible to objectively assess the need for additional measures and identify those areas of research that will bring the management of processes in the upper geospheres to a new, higher quality level.

Pages137-143

Code UDC:551.510.535

Authors

Key words:

high-strength polyethylene, technological process, UHMWPE characteristics, body armor, class of protective structure, protective blocks

Annotation:

The article describes the technological process of production of high-strength polyethylene brand «RUSSIL» at the plant of Special Materials of JSC «NPO Spetsmaterials», St. Petersburg. The main characteristics of hot-pressed block of high-strength polyethylene «RUSSIL» used in modern personal armor protection equipment are given. Separate results of research work carried out in JSC «NPO Spetsmaterialov» aimed at establishing the connection between technological parameters of hot pressing of ultra-high molecular weight polyethylene (UHMWPE) and ballistic characteristics of the resulting protective block are presented. It was found that by varying the time of pressing and cooling of the blocks, as well as the temperature regime and specific pressure, it is possible to develop optimal ballistic characteristics of the protective block made of high-strength polyethylene of the brand «RUSSIL» from the protection class Br1, Br2 and Br3.

Pages144-146

Code UDC:623.445; 678.742.2

Authors

Key words:

injury, trauma, military medical training, combat operations

Annotation:

The article discusses ways to improve the level of military medical training of military personnel, which will improve the quality of first aid to the wounded during hostilities. In real combat situations, servicemen are faced with a lack of knowledge of elements of tactics and practical skills in maneuvers when approaching the wounded, misunderstanding (ignorance) of the algorithm of actions during first aid or lack of coherence of group actions of personnel when extracting wounded from under fire and evacuating them, which often leads to additional losses among the personnel composition. With the beginning of a special military operation, there was a need to improve first aid in the conditions of modern war. The lives of soldiers participating in a special military operation directly depend on this. To train the personnel in the use of first aid before they go into battle, where they will have to apply knowledge and skills in the use of these innovative first aid tools.

Pages147-151

Code UDC:61; 355.5

Authors

Key words:

backpack-transformer, protection, fast transformation

Annotation:

The article discusses the relevance of creating a transformer backpack, capable of quickly providing individual protection of the human body in case of danger. The analysis of existing backpacks used in different countries is carried out. On the basis of the NPO Spetsmaterials JSC deloped conducted research a backpack-transformer «Focus».

Pages152-154

Code UDC:614.8