The work is devoted to the topical issue of improving the accuracy of determining the angular orientation of autonomous aerial vehicles using a dynamic motion model by utilizing a priori information about control signals generated by the onboard autopilot in external stimuli mode.

The developed algorithm is based on a second-order quasi-optimal motion model obtained taking into account dynamic constraints and rational assumptions.

To analyze the effectiveness of the obtained algorithm, numerical simulation of the attitude estimation process for a multirotor unmanned aerial vehicle was carried out. The obtained results demonstrate an increase in the accuracy of estimating the angular orientation of an unmanned aerial vehicle by an average of 7–15 % compared to a similar algorithm without taking into account the autopilot commands.

At the stage of developing a new antifriction coating, it is necessary to take into account the physical and mechanical properties of the materials from which it will be made. The modification of polymer materials to create composites with improved properties is an actively developing field of research. The article presents a developed technology for applying a composite antifriction coating based on rubber modified with molybdenum disulfide and copper powder. The optimal concentration of rubber and solvent has been determined to achieve the required viscosity of the matrix binder, and the intervals for varying the components have been selected. Simplexlattice plans were used to find the optimal percentage of the binder composition and achieve the best tribotechnical characteristics of the anti-friction polymer coating as a whole.

The article presents the results of a study of the effect of various pollutants and thermo-oxidative aging on the dielectric constant and tribological properties of TP-22c turbine oil. It has been experimentally established that the introduction of contaminants such as 40X steel powder, quartz sand and water into the oil, as well as its aging process, lead to a statistically significant increase in dielectric constant and deterioration of antifriction characteristics – an increase in the friction coefficient and the diameter of the wear spot. A strong positive correlation was found between an increase in permittivity and an increase in the friction coefficient, which confirms the possibility of using permittivity measurement as an indirect method for rapid diagnosis of oil condition and predicting wear of friction units without complex tribological tests.

The effect of the adding Al₂O₃ at various percentages to the base matrix of ED-20 epoxy-diane resin on its tribological properties is considered. An analysis of the granulometric composition and chemical structure of the aluminum oxide powder under study revealed the optimal ratio for choosing an additive to the ED-20 base matrix. Tribological tests were carried out on a friction machine according to the «roller–pad» scheme, which made it possible to accurately record the effect of load and sliding speed on the wear of the samples. Tribological studies have shown that the addition of aluminum oxide in various mass fractions (1, 3, 5 %) can significantly improve the performance of the epoxy composite, reducing the coefficient of friction. These effects are caused by the formation of tribofilms on the friction surface, which ensure the stability of the contact effect of the load. The spectral analysis revealed the formation of secondary structures as a result of the interaction of aluminum with epoxy-diane resin. The data obtained confirm the prospects of using epoxy composites in friction units of machinebuilding structures.

The novelty of the work is to establish the effect of the percentage of aluminum oxide additives in the matrix of a composite polymer material on the value of the coefficient of friction based on the results of experimental studies. With a percentage of filler of 1 and 3 %, a decrease in the coefficient of friction by ~9% was detected. The work also evaluates the effect of the load-speed regime on the tribological characteristics of the polymer composite material.

The most important indicator of the safe operation of a car wheelset is the strength of the press joint of the wheel and axle. During and after mounting the wheel on the axle, both parts of the joint are in a complex stress-strain state due to the presence of interference and significant forces of the press fit.

After pressing the wheel onto the axle, there are slip zones in the mating zone, which will naturally increase during operation due to significant dynamic loads. As a result, the adhesion area of the wheel and axle decreases and the stress state of the residual part of the joint increases as a response to the increased load on the adhesion area. Considering the tendency for the axle load to increase and the speed of the rolling stock to increase, this threatens to shift the wheel from the axle. Direct measurement of slip zones in operation is not possible.

This paper presents a computer simulation of the wheelset, analysis and assessment of the stress-strain state of the press joint. The presented research will be useful for making decisions on preventing a dangerous state during the interaction of a wheel and an axle in a press joint.

This study examined the influence of technological parameters of microarc oxidation (MAO), including modification of the base electrolyte with carbon nanotubes, on the wear resistance and microhardness of the formed coatings. Using the concept of a multifactorial experiment, factors such as anodic current density, carbon nanotubes concentration in the electrolyte, and grade of aluminum alloy (D16T, B95) were investigated. Wear resistance tests were performed using a ball-on-plane friction scheme according to ASTM G133-02, and microhardness was measured using the Vickers method. Through correlation-regression analysis and subsequent validation of the models using the Fisher criterion, it was established that the introduction of a small amount of carbon nanotubes into the electrolyte and the use of B95 alloy as a substrate at reduced current density improves the wear resistance and microhardness of MAO-coatings.

Thread milling machines specialize in cutting threads of various types and sizes, both internal and external, using cantilever-mounted disk and comb milling cutters. This article presents theoretical research and derives analytical relationships for sound pressure and sound power levels in milling processes. The resulting analytical relationships make it possible to predict noise levels at various stages of thread milling and develop measures to reduce them.

These measures include optimizing cutting conditions, using vibration-damping materials, employing noise-reducing enclosures and screens, and performing preventive maintenance on machine tools to eliminate imbalances and backlash. Implementing the proposed recommendations will not only improve the accuracy and quality of threaded connections by reducing vibration and improving the stability of the cutting process. This, in turn, will lead to a reduction in defects, increased productivity, and a reduction in production costs, but will also reduce the negative impact of noise on machine operators.

This paper explores the feasibility of developing a new geocomposite material based on clay soils used in railway subgrade construction. This material possesses properties suitable for use as a structural element in earth structures constructed in challenging conditions, where materials and structures require properties such as reduced weight and thermal conductivity while ensuring the stability of the subgrade and its foundation. The proposed material is a geocomposite consisting of clay soil and polyurethane, which, when manufactured, will form a porous structure and will not require additional exposure to high temperatures.

It was found that the traditional strategy of mastering growing traffic by increasing train weight is limited by the characteristics of freight flows and infrastructure. It was determined that the key factor in planning is not the maximum weight, but the correspondence between the weight standard, the structure of freight flows, and the length of station tracks. The need for a transition to integrated capacity management, combining situational increases in train weights with traffic intensification, schedule optimization, and other organizational and technological measures, is substantiated. Recommendations are proposed for the transition to a combined capacity management strategy for sections, combining weight standard optimization with increased traffic volumes, the implementation of intelligent control systems, and other organizational and technological measures. This will enable the flexible development of growing traffic volumes within existing infrastructure constraints.

Modern railway line specialization has a complex structure that takes into account various indicators. This article proposes a system for managing railway line parameters using groups of initial, technological, infrastructure, and economic indicators, which are used to model scenarios for the operation of low-volume railway lines. The railway line parameter management system is based on fuzzy logic, using a set of rules for the mutual influence of various indicators.

The proposed system of railway line parameters allows for the determination of fuzzy weights for indicators and groups of indicators to form a complex integral index, that provide a more comprehensive characterization of the operation of railway lines with various specializations.

Scenarios for the operation for low-volume railway lines are presented for the subsequent development of control actions to improve the efficiency of the railway transport network.

The results of the study can be applied in developing scenarios for the development of the railway transport network, as well as in the formation of comprehensive programs for the development of the transport system, taking into account the specific features of the indicator groups under consideration.

This article examines the key components of information support required to find the optimal route based on a given criterion using road, air, sea, and rail transport. To determine the information support, we reviewed the principles of route formation using examples from various freight forwarding companies, regulations, and reference books governing the transportation of various types of cargo by various modes of transport, as well as the principles for calculating standard delivery times for each of these modes of transport. Based on the analysis, we identified the key data required to solve the logistics navigator problem, its sources, and methods for obtaining it. The results will be used to design the algorithmic component of the logistics navigator.

The review provides a brief summary of the collection of the most interesting reports of the 9th International Scientific Conference «Intelligent Information Technologies for Industry» (IITI'25), which was held from November 4–7, 2025, on the territory of the Federal Center «Sirius» in Russia. The conference was organized by Sirius University of Science and Technology, the Rostov State Transport University and the Scientific Research and Design Institute of Informatization, Automation and Communication in Railway Transport with the support of the Russian Association of Artificial Intelligence.

The aim of the conference is to accelerate the human-centered transformation in Industry 5.0 through AI-based innovation, facilitating the introduction of practical, safe and sustainable technologies that prioritize the interests of people and progress. The reports present interdisciplinary research combining AI in industry, human-machine interface, robotic systems, intelligent transport systems, soft computing, machine learning, multi-agent systems with empirical verification in real industrial conditions.

The growing volume of traffic necessitates the improvement of train control systems and safety measures. The application of the principles and methods implemented by the train control and safety systems using the digital radio data transmission channel contributes to the improvement of the train traffic safety level, as well as the capacity of the transport routes. One of such methods, among many known today, is the adaptive closure of the railway crossing by changing the length of the section of the traffic participants' notification of the train approach to the crossing, which allows to ensure the safe movement of motor vehicles through the railway crossing with the minimum allowable time of notification of the train approach.

A comprehensive solution to the problem of determining the spatial coordinates of traction rolling stock units by primary safety devices based on the analysis of automatic locomotive signaling signals in modern train control systems based on unlimited track circuits is impossible without establishing the conditions for the occurrence of hazardous failures in shunt mode. This is of significant practical importance, since, in addition to receiving a clearance order inappropriate for the train situation, primary safety devices will not be able to refine the spatial coordinates of a traction rolling stock unit within the boundaries of the track circuit in question using signals received from the track line. In this article, based on the mathematical apparatus of track circuit theory and the four-terminal method, basic calculation expressions are derived for determining the value of the train safety criterion for shunt mode. A characteristic dependence has been obtained that allows one to estimate the extent of the danger zone under worst-case conditions for unlimited track circuits with a locomotive receiver. The obtained results form the basis for developing operating algorithms for a prospective train control system without trackside receivers.

This article presents a comprehensive study devoted to substantiating the permissible pressure in a freight car brake cylinder depending on the axle load, taking into account the prevention of wheelset skidding during braking. Three methodological options for determining the maximum pressure are considered, differing in their approaches to accounting for the influence of travel speed on the calculated values of the wheel-rail adhesion coefficient and the friction coefficient of composite brake shoes. Particular attention is paid to the influence of the bogie unloading factor on the adhesion reserve. A comparative assessment shows that the approach that simultaneously considers the adhesion coefficient and friction coefficient provides the best balance between braking safety, resistance to skidding, and train control efficiency under real operating conditions.

Instability of the output voltage of electric locomotive secondary power supplies during significant voltage fluctuations in the overhead contact line leads to malfunctions of equipment, failures, and economic losses from their downtime. As a solution, the development of an improved design of a controlled secondary voltage source with an automatic regulation system that ensures output voltage stabilization is proposed. To achieve this goal, the work involved an analysis of typical secondary power supply circuits, a calculation of key elements such as an isolation transformer, and the development of a control system based on a voltage regulator, verified through simulation modeling in the SimInTech environment. The simulation results confirmed the operability and effectiveness of the developed control system, demonstrating its ability to maintain a stable output voltage during input voltage changes.

The axial-acting braking device, which includes a disc-shoe type brake, is constantly being improved. In the era of digitalization, attempts to create an electromechanical braking device have not stopped in all industries. At the moment, the proposed designs of electromechanical brakes have a number of significant drawbacks that are identified both during the design process and during operation. To solve this problem, it is necessary to develop an intermediate stage of a braking device powered by «traditional» vehicle drives and changing braking characteristics to suit changing external conditions. To do this, the braking device must be equipped with a block for changing braking characteristics when working pairs of brakes interact under discrete external conditions. The braking torque was chosen as the main variable braking characteristic. As a result of the research, a design has been developed that allows you to change not only the pressure position in the drive-paddisc system, but also the normal force in the brake pair.

Determining the spatial coordinates of locomotives, special self-propelled rolling stock, and the head cars of multiple-unit rolling stock is a fundamental task for train control systems. To solve this problem, floor-mounted sensors, odometry devices, and global navigation satellite system receivers have become widely used. Based on the mathematical apparatus of four-terminal network theory, this paper proposes calculation expressions for determining the current under the receiver coils of moving rolling stock at any position along the track. These same expressions can be considered as transcendental equations for determining the spatial coordinates of a traction rolling stock unit based on the known signal current under the receiving coils with a given adjustment at the feeder end.

The obtained results can be used as mathematical support for solving the problem of positioning traction rolling stock under conditions of unstable operation of global navigation satellite systems.

The article is devoted to issues related to the scientific support of the implementation of the new Energy strategy of railway transport.

In terms of increasing energy saving and energy efficiency, issues related to the transportation process and traction rolling stock are being considered: the development of methods to reduce energy consumption in the wheel–rail system, the efficient operation of a continuous welded track and the improvement of lubrication technologies.

In the application of low-carbon energy sources, the effectiveness of measures such as electrification of high-load railway sections, the use of natural gas as a motor fuel, the possibility of using hydrogen and energy storage is being evaluated. In the stationary energy sector, it is proposed to consider the possibility of its own electric generation based on renewable energy sources using them in heat and water supply systems (solar collectors, heat pumps, biofuels) and upgrading boilers with their conversion to low-carbon natural and liquefied petroleum gases.

In the field of improving the accounting system for fuel and energy resources, the possibility of increasing the number and information content of energy efficiency, energy conservation and carbon intensity indicators in relation to wastewater, heat and water supply systems is being analyzed. The possibility of using low-carbon sources in the form of renewable energy sources is also noted.

This paper describes the development of calculation relationships for determining the current in the metal sheath of a fiber-optic cable, which is a part of a traction network with a combined shielding conductor. The return current circuit of an electrified railway is considered as a line with distributed parameters. When determining the total current in the cable's metal sheath, in addition to the current branching from the track into the fiber-optic cable sheath, currents generated by the mutual inductive coupling of the metal sheath with the overhead contact system and the track are also taken into account. The obtained analytical relationships are necessary for determining the thermal stability of fiber-optic cables against long-term operating currents when used in AC traction networks.