Ivanov M. Ya., Levin V. A., Markov V. V.
This article explores the prospects of classical continuum mechanics in the context of the experimental advancements of the 21st century and the concepts proposed by the renowned scientific school of Academician G. G. Cherny. The theoretical foundation of the study relies on the conservation laws of continuum mechanics, classical electromagnetic field theory, and Faraday’s lines of force observed in experiments. Faraday’s electric lines of force are presented as gradients of the electric potential. The magnetic field, generated by moving charges, is also represented through magnetic lines of force by introducing its potential and vortex components. In the stationary case, the theory simplifies to the unified Hooke – Newton – Coulomb law, expressed as a quasilinear Poisson – Boltzmann equation, which provides a unified framework for modeling gravitational, electromagnetic, strong, and weak force fields. In the non-stationary case, the theory extends to an augmented system of Maxwell’s electromagnetic equations. This study offers a substantiated formulation of the future prospects of classical continuum mechanics and includes illustrative demonstration examples.
Andreev S. G., Vorobyova V. N., Donovsky D. E., Startseva V. G.
This paper presents the results of an applied study aimed at developing a mathematical model for calculating the thermodynamic parameters of the Earth’s atmosphere and the wind speed components. The model is designed for subsequent integration into specialized computational software for use in rapid operational calculations. The model allows calculating average monthly values of meteoparameters (temperatures, pressure, density, wind speed components) for every spot on the globe. The solvency of model is confirmed with realization in computing systems of the products 3K and A2, results of practical tests of the products.
Meshkov S. A., Bogachev M. A.
The current methodology for correcting angle-modulated signals is rather limited. It primarily relies on modified Wiener filter methods, which are applicable only to linear modulations. For nonlinear modulations, heuristic algorithms are typically employed, whose effectiveness is challenging to evaluate from a theoretical perspective. This paper proposes an algorithm for correcting angle-modulated signals using the theory of hidden Markov models (HMMs), which can predict errors in the demodulated bitstream. The proposed algorithm is distinguished by its high degree of parallelizability, enabling efficient implementation on GPUs or vector processing units in CPUs, thereby ensuring high computational speed.
Algazin S. D., Sinitsyn A. A.
The article examines the flutter behavior of finite-length conical shells. Conical shells are widely used as components in aviation engineering, making the analysis of their oscillations essential for ensuring safety and stability. The paper presents a modern non-saturation numerical algorithm and derives an approximate formula for the critical flutter speed of a conical shell, enabling the avoidance of complex calculations in practical studies of rocket engine nozzles. Specific calculations are provided for four materials: titanium, steel, aluminum, and duralumin, demonstrating the method’s high efficiency. A general interpolation formula is developed, which satisfies the boundary conditions at the free edge.
Andryushkin A. Yu., Komarov K. A., Humanenko Ya. D.
The impact of operating temperature on the mechanical properties of aircraft structures must be considered to ensure their weight efficiency. This study examines the structural configurations of compression-loaded power struts made with aluminum, titanium, and carbon fiber tubes. The optimal design of a power strut corresponds to the minimum mass of the tube, as well as its associated outer diameter and wall thickness. A carbon fiber tube provides high weight efficiency at operating temperatures up to 100°C, whereas a metal tube is more effective at temperatures exceeding 100°C.
Vashchenko А. N., Grigoriev M. N., Zihan Zhang
This paper analyzes the early Chinese unmanned aerial vehicles (UAVs) put into operation, which were originally obtained from the USSR in the late 1950s. The development of indigenous UAVs and the establishment of Xi’an ASN Technology Group Co., Ltd. (ASN) are examined. The accumulated experience of UAV development in Chinese universities, as well as collaboration with educational institutions, is discussed. The transition of UAV applications from dynamic flight simulators of conventional aircraft to the transport sector is described. The People’s Republic of China (PRC) is highlighted as achieving remarkable success among the world’s leading aviation powers in the development of civilian heavy cargo UAVs, supported by substantial state backing. The study identifies potential areas for cooperation between the PRC and the Russian Federation in the development of civilian heavy cargo UAVs, including the joint utilization of the SA750U UAV for both cargo delivery and forest fire suppression.
Frolova E. O., Lobov V. A.
The relevance of prototyping and the use of additive technologies lies in their ability to create complex and unique parts in short terms. In the work, the design of an automatic loading system made of plastic using additive technologies was designed as an alternative to traditional production. During the implementation, optimal printing modes were determined, the main mechanisms and units were developed and experimental studies of performance were carried out. The results obtained allow reducing time and material costs by reducing the cost of manufacturing products.
Bocharov P. V., Libman M. S.
This paper introduces an algorithm for the automatic classification of surface targets based on data from passive radar stations. The primary focus is on developing an end-to-end classification approach that minimizes the loss of potential solutions by accounting for all possible classification scenarios of radio-electronic systems (RES) at intermediate stages. To describe the parameters of radio emissions, n-dimensional vectors are utilized, where discrete and continuous parameters are modeled through intervals. This allows for the consideration of emission variability under real-world conditions. The algorithm is grounded on set theory and probabilistic methods, adapted to scenarios where narrow probabilistic distributions are unavailable. The classification process consists of two stages: identifying RES based on their radio emissions and classifying carriers using combinations of RES. The key advantage of the proposed approach is its ability to preserve all classification options and incorporate them into the decision-making process for selecting the recommended solution. Examples of the algorithm’s application illustrate its effectiveness in real-world scenarios. Computational costs are analyzed, and potential directions for further optimization are identified to enable integration into automated surface surveillance systems.
Zakharov S. A., Masyagina D. A., Konoplev Yu. V., Sotnikova N. V.
This paper proposes an approach to data integration at the pixel level using a weighted sum method, which enables the application of weights to different channels or pixels. This adaptability allows the method to be tailored to specific tasks and conditions. For instance, signals from more reliable data sources can be amplified, while noise components can be suppressed. Unlike more complex algorithms such as the Kalman filter or machine learning techniques, this method offers relatively low computational complexity. This makes it suitable for processing large volumes of data in real time or under constraints of limited computing resources.
Penshin I. S.
The article examines the potential application of neural network technologies and computer vision to automate the standard control process for design documentation. Standard control, a critical stage in engineering design, traditionally demands substantial time, labor resources, and a high level of specialist expertise. Modern deep learning methods offer the potential to significantly reduce these demands, eliminate human factor influence, and minimize the risk of errors. The study highlights algorithms that ensure the verification of design drawings against regulatory standards such as GOST and ESKD. A concept for an automated standard control system (ASC) is introduced, which integrates with CAD systems and incorporates stages such as data preprocessing, image analysis, comparison with reference standards, and generating reports on detected discrepancies.
Pravidlo M. N., Biryukov P. A., Tishchenko D. Yu.
This paper analyzes the key challenges encountered during large-scale calculations using simulation-based computer models in research, development, testing, and engineering projects and proposes solutions based on a systematic approach. The features of creating digital computer models structured as hierarchical systems of functional digital twins and fractals are examined in detail. The study also specifies the technology for organizing and conducting simulation modeling, employing original tools for automating the preparation of input data, parallelizing computations, and analyzing results.
Krechetova M. V., Malyukov A. S., Savelyev S. K.
Specialized software has been developed for detailed and accurate calculation of the intraballistic characteristics of solid fuel energy systems. This software is designed to streamline the engineering process by analyzing various aspects of system operation, including intra-chamber pressure, thrust dynamics, fuel charge degradation, flow behavior in nozzle blocks, and the structural strength of components.
Aleksandrov A. A., Shevchik A. A.
Accurate positioning of unmanned aerial vehicles (UAVs) in space necessitates new approaches to autonomous navigation and the protection of externally corrected data from external measurement sources. This paper presents an overview of the evolution of radio-inertial-satellite navigation systems with external corrections, focusing on the latest advancements in the design of “deep” integration schemes. The future directions for their development and practical application are also discussed.