It is considered the problem of providing automatic control of dynamic objects that are part of an intelligent transport system and operate in various modes which requires an increase in the efficiency of the control laws used in order to maintain speed, stability and others. The initial system is presented in the form of Lagrange equations of the second kind, which restrictions are imposed on it to guarantee full controllability of the system. To construct the control, the principle of decomposition is used, which divides the system with n degrees of freedom into n independent subsystems with limited perturbations. In this paper, an intelligent control law for a subsystem with a priori unknown perturbations is constructed based on a law that is quasi-optimal in terms of speed and a law that ensures the maximization of the attraction area, using fuzzy logical inference. Modeling is carried out on examples with various non-linear types of perturbations. The analysis of the simulation results shows that the constructed control law ensures that the ambit of the terminal point is reached in a time close to optimal, while, in comparison with the known quasi-optimal control law in terms of speed, the proposed law does not enter the oscillatory mode near the terminal point, and also has no discontinuity points on trajectories of motion of a nonlinear dynamic system. It is shown that the application of the decomposition principle makes it possible to construct intelligent control laws for a system with several degrees of freedom.

The paper considers the efficiency of decision making in industrial equipment diagnosis, an approach to the knowledge base validation (KBV) containing mixed production rules (MPRs) of intelligent equipment diagnosis systems. The classification of structural errors in the KBV with their definition and representation in the form of a directed graph, as well as recommendations for their elimination, is proposed. This approach will reduce the KBV size, which will make the search process more efficient and simplify the organization of output control. It is given the screen parts forms of the developed software system for automatic search using the structural errors in the KBV. The software system will provide to remove unnecessary rules without losing useful information.

The paper considers the possibility of using an intelligent control algorithm based on the maximum condition of the generalized power function and the fuzzy logic apparatus in the problem of automatic speed control of a new generation electric locomotive with an asynchronous traction motor. An automatic speed controller for an electric locomotive was built, and the simulation of the movement of a passenger train with an EP20 locomotive at a given speed on the Moscow – Ryazan and Moscow – Adler sections with an appropriate track profile was carried out. An analysis of the simulation results allows us to conclude that the developed intelligent control algorithm can be used to build a speed control system for a new generation electric locomotive with an asynchronous traction motor to ensure movement at a given speed in various operating modes of the locomotive under conditions of a priori unknown influences.

The study analyzes both the theoretical and technological foundations of the current technical and technological model for managing the transportation process at the landfill in the direction of the ports of the Azov-Black Sea Basin (ACB). The analysis of the volume of local work, the volume of incoming car traffic at the junctions of the road, on the basis of which proposals are made to optimize the model of management of the transportation process, taking into account the "bottlenecks" for the promotion of car traffic. Based on the existing model of transportation process management, the existing capacity constraints, the measures taken to develop the transport infrastructure, the dynamics of the arrival of car traffic at the junctions to specific port stations and their share of routing, proposals were formed for the organization of the promotion of car traffic to the address of the ACB. The key proposals for adjusting the model of transportation process management at the landfill of the North Caucasus Railway have been identified.

The dynamics of the global market contributes to the increase in the number and potential of transport corridors. The North-South transport corridor considered in the work is one of the strategic ones in ensuring the flow of goods in the direction of India-Iran-Azerbaijan-Russia-European Union.

A predictive analysis of the dynamics of the development of the freight turnover of the transport corridor was carried out, drivers and barriers to its development were identified in the context of changes in the geopolitical and economic environment of the markets. Attention is paid to the issues of balanced development of the potential of transport corridors, taking into account the formation of nodal transport and logistics centers at the intersections of meridional and latitudinal corridors.

It is shown that railway transport in the ITC "North-South" in its Russian segment is becoming a key factor in the development and competitiveness of transportation compared to alternative routes. The issues of the competitiveness of container transportation of the ITC "North - South" in the conditions of growing multimodality and the growth of containerized cargo are considered. Prospects for the development of the ITC "North-South" in the future depend on active organizational decisions in ensuring the planning and regulation of flows, excluding international barriers in its development, as well as the introduction of digital technologies for monitoring and managing flows.

The paper presents the results of the key performance indicators' study in the context of strategic development and setting the target results of the company's activities. The content of the system of balanced indicators and key performance indicators is revealed as well as the specifics of the above indicators in the field of transport and logistics activities. Based on the analysis of the existing KPIs, the problems of interaction between the divisions of JSC "Russian Railways" during the transportation process have been identified and new end-to-end KPIs have been formulated that allow eliminating bottlenecks in the management of the Unified Network Technological Process. The activity of the traffic management directorate is defined as resulting in the management of the effectiveness of the end-to-end process. The requirements for modeling the business processes of JSC "Russian Railways" based on KPI management have been formulated.

Methodological principles for choosing routes for organizing regular contrailer services are proposed using the peculiarities of transporting general cargo by road. To identify the most popular railway sites where it is advisable to organize contrailer services, the network of highways and vehicle routes that best correspond to the railway lines were analyzed. Based on the analysis of statistical data, the routes of road trains and the regions with the highest frequency of their presence were determined. The directions of the most intensive loading of federal highways by road trains have been identified. An assessment is made of the technical and technological capabilities of the railway infrastructure, as well as the readiness of terminal and logistics facilities to organize regular contrailer services. As a result, the main routes for organizing regular contrailer services were identified, to provide the specifics of organizing these transportations and interaction with the road transport infrastructure. The results obtained can be used to substantiate the systematic organization of contrailer services on the Russian railway network, including its key consumers.

In this paper, the analysis of the signal transmission with complex binary amplitude manipulation through a nonlinear frequency-selective amplifier is performed. It was obtained the expressions for the spectrum of the amplitude-manipulated signal. Formulas were proposed for the main harmonics of the output signal in the form of segments of Volterra functional series. A computer simulation of the input amplifier circuit of the receiver of the MOTOROLA GP300 radio station was carried out using numerical integration methods and Volterra functional series. The spectrum and time function of the output signal are obtained for various parameters of frequencies and amplitudes of the manipulated signal. The probability of error is estimated depending on the frequency of the envelope of the amplitude-manipulated signal. The gain factor is analyzed and the effect of the signal amplitude on the degree of distortion of information when passing through the amplifier is investigated.

At present, modern process control tools and emergency protection systems are being widely introduced in the oil and gas industry, which together with process equipment form automated technological complexes (ATC) and can significantly reduce the risks of emergency situations.

The development of technological process at oil refineries increases the requirements for speed, reliability and versatility of automated emergency protection systems.

In this connection three main directions of research of the given problems arise:

-          first, obtaining, processing and issuing information about the mode of operation of the automated emergency protection system (AAPS);

-          secondly, control of the algorithm of functioning. Secondly, control of the algorithm of emergency protection system functioning with the help of commands given by the ASEPPP;

-          thirdly, diagnostics of the emergency protection system during the technological process.

The complexity of safety systems development is due to the growth of technological processes. Today, in the design and development of automated fire protection systems, it is necessary to implement artificial intelligence in order for the systems to function as intended. The purpose of this research is to create the basis of mathematical model of automatic control model of emergency protection control machine of polymerization process plant.

The paper presents an approach to building digital twins of business processes for energy supply of train traction at railway ranges. The approach is based on a matrix structure for representing the business processes of freight transportation and their provision by the central directorates of Russian Railways. It is proposed to use functionals as a form of constructing digital twins (models), and as parameters of the digital model are indicators that have the highest level of correlation with the actual indicator of energy supply for train traction. The following indicators of business processes were considered as electricity consumption for traction of trains; specific energy consumption for traction of trains; power imbalance; work in electric traction; local speed; average weight of a freight train and others.

The paper is devoted to the study of optimal braking modes by asynchronous electric drive using the maximum principle. The optimization criterion is the minimum square of the voltage supplying the electric motor. The controlling influences were the frequency and amplitude of the supply voltage. A mathematical model of a generalized electric machine was used in the calculations. It is determined that for cases when it is necessary to reduce the braking time of an asynchronous electric drive in accordance with the operating conditions of electrical equipment, it is necessary to take into account that reducing the braking time will lead to an increase in electrical losses in the windings of an asynchronous motor and an increase in the amplitude values of current and electromagnetic torque. Increasing the braking time will reduce electrical losses. The dependence of electrical losses in the windings of an asynchronous motor on the optimal braking time is not linear, therefore, it is advisable to choose the braking time on a flat section of this dependence.

Psychological aspects of work safety are becoming more and more relevant, despite the automation of production processes, a person has been and remains a constant participant and at the same time the most vulnerable element in the "man-machine" system. To date, the state of affairs with industrial injuries in the electrification and electricity supply economy indicates that the level of safe work culture has not reached the point where unconditional fulfillment of the basic safety requirements is mandatory for all employees. The paper discusses the issues of formation of methods of analysis and assessment of occupational risks using the influence of the human factor as an effective tool to reduce injuries.

According to the influence of the atmosphere on the results of astronomical, geodetic, photogrammetric work, as well as remote sensing is an urgent task in the implementation of various scientific and practical projects of our time. The use of modern means and methods of geodetic measurements, changing parameters of the Earth's atmosphere due to natural and anthropogenic processes, increasing requirements for the accuracy of the obtained results necessitate the development of more advanced ways to account for the influence of refraction and deceleration of the speed of electromagnetic waves on the accuracy of measurements both in the light and radio range. The paper shows the need to take into account the influence of refraction on the measured distances at zenith distances of more than 45 degrees. A formula is proposed for the high-precision determination of corrections due to the influence of refraction in the distances measured by radio-optical systems.

A change in the regulatory parameters in the track design and its elements, as well as a change in the technology of work, leads to a change in the nature of the interaction of rolling stock and track elements, a change in the type and characteristics of various mal-functions, especially for conditions of intensive track operation. The calculations to be done by modeling have established that for a serviceable and workable track structure, the stress safety factor in the most loaded cross-section of the rail is 1.7 with a rigid (stabilized) sub-rail base, 1.3 with a weak (soft, immediately after repair of the sub-rail base). Both with a weak and with a rigid sub-rail base, in case of destruction of the receiving sleeper or its absence, the safety margin coefficient was 0.82. Currently, given the relatively low complexity of perform-ing work with the use of adjustment pads (cards) on local sections, as well as a relatively short period of time required to perform these works, this method has become widely used to elim-inate malfunctions in the form of local subsidence, distortions, and other deviations in the position of the rail threads of the railway track in the profile. At the preliminary stage, it was found that the consequence of reducing the under-rail support platform when using adjustment pads (cards) is a decrease in the elastic modulus of the under-rail base by 7-15 % and an increase by 8-12 % fatigue processes of degradation of rail steel.

The paper considers normative documents and other open sources, which give the norms for the duration of the construction of bridge structures, depending on their type and parameters. The terms of construction of bridge structures were analyzed, which had a total length of 30 to 1800 m. As a result of the analysis, the construction terms in the main and preparatory periods were determined and the average values of the duration per linear meter of the structure were obtained. On the basis of the data obtained from regulatory documents and open sources, graphs of the dependence of the duration of construction on the length of the bridge structure were constructed. Based on the totality of the data obtained, graphs of the minimum, maximum and average construction time were constructed. The obtained values were compared with the time spent on the restoration of bridge structures that were destroyed as a result of natural impacts on real objects.

The paper describes the project implementation of shunting locomotives automatic control when operating at marshaling yard. It is provided the information about the implemented project of TEM7A diesel locomotives modernization for the possibility of diagnosing locomotive equipment when operating in unmanned mode. It is presented a block diagram of the on-board equipment of the TEM7A shunting diesel locomotive, which is equipped to operate in automatic mode under the control of top-level systems. And it is given the oscillogram records of mathematical modeling results of the train pushing and breaking up processes. The results of the locomotive test trips with the developed algorithm at the Luzhskaya marshaling yard of the Oktyabrskaya railway are given (with different speeds and masses of the train).

The paper presents the design of sliding wheelset for wagons operating in interstate traffic with different track gauge. It is presented the main elements of the developed sliding wheelset and their interaction for changing the track gauge. A distinctive feature of the proposed design is the use of locking plates as retainers, which work exclusively on shear without shear forces and are additionally pressed to the grooves due to the centrifugal force of inertia during wheel rotation, which provides fixation of wheels during movement even in case of mechanism breakdown This design is characterized by compact design, increased reliability and durability. The infrastructure of the railroad station to provide gauge change is also proposed.

Using methods of mathematical description and calculation, the advantage of implementing the braking curve of a passenger train is substantiated, ensuring a constant pressure safety factor, previously determined to ensure the same conditions for the property of wheel pairs throughout the entire braking period. The dependence of braking acceleration on this coefficient is derived. By solving integral equations for typical train parameters, the dependences of the distance traveled on speed (braking curve), braking acceleration on speed and braking time were constructed at a constant specified coefficient. These characteristics were compared with similar parameters when implementing other methods of braking control over the same braking distance: with constant acceleration and constant brake pressure (constant pressure in the brake line). It is shown the effectiveness of the proposed braking method in comparison with those described above.

The subject of the paper is due to necessity to organize the transportation of the solidified bulk cargo on the territory of the Russian Federation at subzero temperatures. Such cargoes include boiler and naval fuel oil, cracking residues, heavy petroleum oils, tar and oil bitumen, etc. A method is considered that provides the creation of primary channels in the solidified mass of petroleum product with the possibility of using both a steam heating system and an electric heating system equipped with linear heating elements. The device provides rapid erosion of the solidified fraction carried out almost simultaneously with unloading. The proposed measures aimed at increasing the stability of the movement of a tank car or a tank car, as well as reducing the time and thermal energy costs when unloading solidified bulk cargo are easily feasible.

Increasing reliability and guaranteeing uninterrupted operation of the railway is an objection where its solution lies in the field of functionality of magnetic induction sensors. The results of this study were obtained on the basis of many years of experience in operating magnetic induction sensors in railway automation systems (RAS). An algorithm for identifying a wheel defect based on isolating a useful signal, as well as determining a signal corresponding to a certain type of defect, was studied. The results of the study made it possible to formulate a plan for the modernization of magnetic induction sensors with the prospect of combining them into a monitoring system that will continuously diagnose the technical condition of the rolling surface of rolling stock wheels when moving over the sensor. The introduction of this analysis technique will make it possible to diagnose flaws in railway wheel sets directly on the train route and guarantee a reduction in the accident rate on the railways of our country. Algorithms for signals corresponding to a specific defect are also being developed, and the implementation of developed software to expand the functionality of magnetic induction sensors is being developed.

The paper is devoted to the development of mathematical models of the stress-strain state of metal supports of the railway overhead line. The methods of the theory of experimental planning are used as a mathematical apparatus. The stress-strain state is characterized by the maximum Mises stress in the element, the maximum longitudinal normal compressed and stretched stress, and the deformation of the element. The input variables are the compressive/tensile force, the presence of damage on the element, its length and cross-sectional area, additional force in the transverse direction. A complete factorial experiment of 32 experiments was conducted. The experiments were carried out using the Femap finite element modeling software package. Based on the results of the experiments, four regression-type mathematical models were constructed using the Gretl econometric package. With their help, the factors that have the strongest influence on the stress-strain state have been identified.

This work is devoted to the study of new ceramic-polymer coatings formed by microarc oxidation (MAO) method during friction in environmentally saved lubricants using polyalphaolefin (PAO), polyethylene glycol (PEG) and diisotridecyl adipate (DITA). The coatings were formed in a weakly alkaline electrolyte with the addition of a fluoroplastic suspension using a cyclic mode. To improve the adhesion strength of fluoroplastic to the oxide matrix, additional heat treatment was performed. The resulting ceramic-polymer coatings consist of an oxide matrix with fluoroplastic particles embedded in it. Tests have shown that new ceramic-polymer coatings have improved tribological characteristics relative to traditional MAO coatings at the friction both to steel and to the eponymous surface.

The paper considers the possibility of using a axle lever with a trolley frame of a high-speed electric train in the communication node instead of a traditional rubber-metal hinge with a conditionally constant longitudinal stiffness - a hydroblock having a frequency-dependent characteristic of radial horizontal stiffness. This design of the hydroblock allows you to combine low values of longitudinal stiffness when moving in curved sections of the track with high values of longitudinal stiffness necessary for stability of movement at high speed. With an increase in the speed of movement of the railway crew, the frequency of horizontal vibrations of the wheelset increases, which leads to an increase in the dynamic rigidity of the hydroblock and ensuring a high critical speed of the crew. On the contrary, movement in curved sections of the track is carried out with lower movement speeds and vibration frequencies of the wheelset. The selection of optimal parameters of the hydroblock makes it possible to provide both a high margin of stability and a decrease in the angle of approach of the wheelset when driving in curved sections of the track, and as a result, a decrease in wear on the surfaces of the wheel and rail.