Vol 9, No 207-208 (2025): Вопросы оборонной техники. Серия 16. Технические средства противодействия терроризму

The article presents a methodology for optimizing the planning and allocation of capital investments to improve the efficiency of restoration and reconstruction of unfinished construction facilities in a limited period of time. At the first stage, the initial distribution of objects into groups is carried out. Next, the optimal distribution within the groups is selected according to the efficiency criterion based on the method of branches and boundaries. In conclusion, the remaining capital investments are redistributed to maximize recovery volumes based on a generalized algorithm. The methodology allows for the optimal allocation of capital investments for the effective restoration of facilities, taking into account the integrated performance indicator and forming a schedule for the restoration of facilities for the entire planning period.

The paper formalizes the relevance of the task of developing a methodology for establishing a multi-interval connection in multi-satellite orbital constellation. The paper presents a mathematical formulation of the problem of establishing a multi-channel connection in multi-satellite orbital constellation, providing information exchange between the sender and the recipient with specified geospatial coordinates.The methodology is presented, differed from known ones by taking into account the availability of the terrestrial backbone telecommunications infrastructure of the Earth station, planned to establish connection on the «spacecraft — Earth station» down line. The presented methodology can be used to evaluate characteristics of promising satellite communication networks focused on providing global high-speed information exchange.

The article discusses the method of determining the probabilities of performing a set
of works modeled using networks. The authors propose an approach based on the
multiplicative probability function, which allows you to identify the probabilistic-critical
path and analyze the reserves of the probabilities of performing work. Described is a foursector method for calculating the lowest and highest probabilities of events, as well as probability reserves. Examples of calculations and comparison of critical paths in time and probability are given, demonstrating their possible mismatch. The method is tested in computational experiments and can be used to control work complexes in organizational and technical systems.

Internal stresses significantly affect the condition of the polymer coating of special-purpose equipment. The magnitude of the internal stresses is determined by the shrinkage applied to the base (substrate) of the polymer composition. High internal stresses degrade the functional properties of the polymer coating, lead to an increase in defects, and shorten its service life. An expression is obtained for estimating the internal stresses in a polymer coating along the bending radius of a cantilever beam, taking into account the Young's modules and the thickness of the polymer coating and the metal base. The magnitude of the internal stresses depends on the layered structure of the polymer coating. The theoretical determination of internal stresses in single-layer and multilayer polymer coatings of the same thickness is carried out according to the expression obtained and according to the expressions proposed
by other researchers. It is shown that with the same thickness of the polymer coating, the internal stresses in the six-layer coating are 14,7 % less than in the single-layer coating.

The article presents methodological recommendations for ensuring the safety of people in terms of the parameter of causing barotrauma by an air blast wave when they are in the near zone from the Fountain explosion protection device with an improvised explosive device placed in it containing an explosive charge, the mass of which in TNT equivalent is unknown and is approximately determined based on the subjective expert opinion of a specific explosive expert. Based on the results of field tests, safe distances for people to be located in terms of the parameter of causing barotrauma by an air blast wave when detonating TNT charges, the mass of which is 2–3 times greater than the standard values for each product, in the Fountain-1 explosion protection devices of models 05K, 10K, 20K and Fountain-2 of models 05U, 10U were obtained.

Over decades of development, laser illumination indicators have become an essential
element of armored vehicle protection systems against guided weapons. Based on their research, the authors propose a design for a tank indicator with increased sensitivity and interference immunity to ensure reliable detection not only of pulsed radiation from laser rangefinders and target designators, but also of modulated radiation from weapon guidance systems. The main elements of the indicator are a photosensitive element in the form of narrow strips of small size, paired in differential signal comparison circuits, a fast spherical concentric objective based on two lenses with a large entrance pupil area, and a special electronics unit for signal analysis and processing. A distinctive feature of this technical solution may also be its relative simplicity of design and minimal cost.

The article describes a methodical approach to calculating the energy reserve of the Earth-Space satellite radio link under conditions of unintentional narrow-band noise interference. Using binary frequency-shift keying and non-coherent detection signals as an example, the dependences of the obtained level of radio link energy reserve on the interference overlap coefficient by frequency are presented. The studies were conducted using analytical and simulation modeling for different carrier frequencies and with different requirements for the bit error probability. As part of the solution to this problem, it was shown that when exposed to unintentional interference of the same power, but concentrated in a part of the signal spectrum, a more negative effect is observed than when interference is present across the entire reception band.

The reliability and survivability of special-purpose equipment depends on the condition of the polymer coating performing various functions. The quality indicators (strength, heat resistance) and functional properties of the polymer coating deteriorate over time. Therefore, it is important to solve the problem of increasing the durability of polymer coatings. The relationship between durability, operating temperature, and acting stresses in a polymer coating, and the physical constants of the polymer that determine them, is shown. The analysis of the causes of internal stresses in the polymer coating, as well as ways to reduce them, is carried out. The effect of macroscopic concentrators and polymer coating defects on the stresses acting in it is analyzed. The effects that cause an increase in the quality of the polymer coating during its layered application are considered. An increase in the durability of layer-by-layer polymer coatings of specialpurpose equipment has been scientifically substantiated.

This article provides data on the analysis of the security system of military service in
the Armed Forces of the Russian Federation in terms of potential readiness to manage
professional risks, preventing the appearance of undesirable results in advance (for
example, injury, death of a serviceman, etc.). It has been established: as of today, the army and navy of our country have not yet been fully established appropriate conditions for the transition to a qualitatively new level of ensuring the safety of military service for military personnel, namely, occupational risk management. The military administration bodies of a military unit (organization) are in a very difficult position: despite the specific goals and objectives set, they still do not have the necessary and sufficient resources to achieve them, in particular, this concerns conducting instrumental and laboratory studies of military service conditions, which cannot be dispensed with, since they allow them to provide accurate and reliable answers in the process of identifying harmful and/or dangerous factors.