Vestnik of Samara State Technical University. Technical Sciences Series

Journal Vestnik of Samara State Technical University ( Technical Sciences Series) has been published at SSTU since 1993 and now it is an academic periodical aimed at scientific research development, support of leading scientific schools and staff training.

The journal publishes original experimental and theoretical articles of leading national and foreign scientists on the most topical problems of system analysis, automation and control of technological processes, IT, Electrical Engineering, Instrumentation and Metrology, Energetics, Metallurgy and Material Science.

Research headings :

  • Informatics, Computer Science and Control
  • Instrumentation, Metrology and Informative-measurings devices and systems
  • Electrical Engineering

The Journal is included by the Higher Attestation Commission (VAK) in the list of leading scientific magazines and editions.
Full-text access to articles is available on site at

Current Issue

Vol 31, No 2 (2023)

Information Technology and Communications

Quantum computing in automated invoice factoring control systems
Boryaev R.O., Chuvakov A.V.

Abstract. The aim of this paper is to describe existing approaches to automation in enterprise management systems of invoice factoring operations. The relevance of this problem is estimated by the volume and dynamics of growth of the invoice factoring market in the Russian Federation. The existing performance problems inherent in software built on the basis of classical algorithms are considered, and their optimization by using quantum algorithms is proposed. Attention is focused on the problem of parallel computing as the main feature, which allows to achieve a significant increase in computing power. Possible way of solution, based on the joint use of quantum and classical approach within one software complex is given. Application of quantum Monte Carlo method for the purpose of improvement of the automated information system of the enterprise is described. The received result allows to draw a conclusion about perspective of use of the given technique for construction of the combined quantum and classical algorithms in systems of management of factoring operations.

Vestnik of Samara State Technical University. Technical Sciences Series. 2023;31(2):6-19
pages 6-19 views
The problem of optimal assignment of autonomous vehicles in production-logistics system
Volhonskaya E.E.

The problem of optimal assignment of autonomous vehicles to ongoing production processes is considered. Virtual testing for predictive maintenance involves the creation of digital twins based on simulation models. The solution of the assignment problem described in the article is the basis for building simulation models on Petri nets to analyze the dynamics of the production- logistics system. The structure of the agro-industrial system of grain harvesting by a complex of combines using autonomous vehicles based on KAMAZ vehicles is considered. Many characteristics of the production-logistics system have been determined: field areas and productivity, productivity of combines, carrying capacity and speed of vehicles, etc. The problem of minimizing operating costs for a complex of vehicles for a given distribution of combines over fields with grain crops has been formulated. The problem relates to integer linear programming with Boolean variables. The difference in the formulation of this problem lies in the formation of a number of restrictions that take into account the main parameters of the production-logistics system. An example of optimizing the distribution of autonomous vehicles for a given number of fields of harvesters processing them is considered. The resulting solution allows you to determine the set of vehicles ready for operation, as well as form a reserve of vehicles to reduce downtime. The solution of the proposed problem can be used as the basis for the structure of the simulation model as part of the digital twin of the production and logistics system. Also, the technique can be used in the current planning of real work of combines and vehicles.

Vestnik of Samara State Technical University. Technical Sciences Series. 2023;31(2):20-30
pages 20-30 views
Dynamic model of a waste heat boiler
Danilushkin I.A., Kolpashchikov S.A., Lusenko D.S.

The paper discusses the experience of developing and identifying a model of a waste heat boiler as a distributed parameters plant. The waste heat boiler is considered as a heat exchanger with cross flows of interacting media. The first order hyperbolic equation acts as a mathematical model of water flow heating with a variable rate. Using the spectral method of distributed systems, a representation of the problem is obtained in the form of an expansion into a series in an orthonormalized basis, which makes it possible to represent the solution in the form of a vector-matrix model of the state space. The state-space representation is used to implement the model in a dynamic systems simulation package. The heater temperature calculation is based on the energy balance equation. The temperature of the media separator wall is determined by the heat fluxes between the exhaust gas, the wall, and the heated water. The wall temperature is assumed to be constant along the entire length of the heat exchanger. The paper presents a block diagram of the model, which takes into account the mutual influence of the wall temperatures and the heated water flow. The heat flux from the exhaust gas is calculated directly from the known parameters of the exhaust gas at the inlet and outlet of the waste heat boiler. Based on the design parameters of the heat exchanger, the dynamic characteristics of the heat transfer process are determined. The data obtained during the operation of the waste heat boiler are used to identify the heat transfer coefficient between the walls of the heat exchanger and the water flow. The result of the heat transfer coefficient identification agrees with the reference data. The article presents graphs of the original data, simulation results. It is shown that the maximum mismatch between the model and real data does not exceed two degrees, and the mean absolute error is less than 0.2 degrees.

Vestnik of Samara State Technical University. Technical Sciences Series. 2023;31(2):31-42
pages 31-42 views
Development of software simulator for the motion and colreg obstacle avoidance of unmanned ship
Duda A.A., Pushkarev I.I., Krasavina A.F.

The article discusses the development of a software simulator for the motion and COLREG obstacle avoidance of unmanned ship, the use of which simplifies the process of creating and testing unmanned vessels. The main requirements for the simulator, its purpose, structure, and capabilities are presented. The algorithmic basis of the developed simulator is described: the trajectory tracking subsystem uses the gradient algorithm of the auxiliary function, and the obstacle avoidance subsystem is implemented using the velocity obstacle method adapted for the COLREG. The general logic diagram of the program is presented, containing basic subsystems, elements that provide flexibility in configuring the simulator, and elements for analyzing the results of its work. The most common programming languages in the field of robotics are considered, and the suitable language for developing the software simulator – the C++ programming language – is chosen. The graphical interface of the developed program and its main elements are presented. To test the functionality of the software simulator, modeling of the main obstacle avoidance situations was carried out: head-on, crossing (obstacle moves to the left or right), and overtaking. The results of this modeling are presented. The created software simulator for the motion and obstacle avoidance of unmanned ship meets the requirements set for it in the work, allows modeling of the motion of unmanned ship and to perform avoidance according to COLREG. The implementation of trajectory tracking and obstacle avoidance subsystems as separate software elements makes it possible to use them without significant modifications in the onboard control systems of unmanned ships.

Vestnik of Samara State Technical University. Technical Sciences Series. 2023;31(2):43-55
pages 43-55 views
Interval traffic analysis of multichannel queuing systems
Likhttsinder L.Y., Privalov A.Y.

The passage of streaming video traffic through the backbone switch of the communication node is considered. The features of video traffic, which has a pronounced burst character, are analyzed. The influence of the characteristics of such flows on the sizes of queues in the nodes of telecommunication networks is studied. The results of analytical consideration and simulation modeling are presented. The generalized Khinchin-Pollachek formula is considered and for group flows a linear dependence of the numerator of this formula on the load factor is shown. It is shown that, in contrast to Poisson flows, the queue sizes in multichannel queuing systems with video traffic flows practically do not decrease with an increase in the number of channels.

Vestnik of Samara State Technical University. Technical Sciences Series. 2023;31(2):56-69
pages 56-69 views
Modelling and control of hydrogen production processes based on electrolysis
Mironov E.A.

Currently, hydrogen is considered as one of the most promising energy carriers, the production of which is possible from various raw materials, including water, natural gas, hydrogen sulphide, coal, etc. The article presents the main results of an analysis of global technological trends in the development of hydrogen generation methods in the period from 2010 to 2038, which aims to identify in-demand and popular technological solutions for hydrogen energy. The analysis is based on the International Energy Agency's database published in October 2022, which contains the most comprehensive information on the key characteristics of 990 hydrogen projects based in sixty countries: output, installed electrical power, carbon dioxide emissions, type of output, stage and timing of implementation. The analysis shows the steady leadership of electrolysis hydrogen generation technologies in the context of the search for the most widespread method of hydrogen production. At the same time, the global hydrogen energy industry has clearly expressed trends towards the increased introduction of alternative (non-electrolysis) technologies in large-scale industrial production. Based on the existing empirical Ullerberg model, a modified universal structural simulation model of hydrogen electrolysis generation in plants with alkaline electrolysers and with proton exchange membrane has been proposed. The modified model has been developed in MATLAB application package and Simulink dynamic simulation environment using Simscape physical simulation elements. Verification procedure of the developed model showed good agreement of simulation results with the experimental data available in the open sources and obtained at the alkaline electrolysis and proton exchange membrane electrolysis plants. To increase the energy efficiency of hydrogen production process, a single-loop system for automatic regulation of feed water temperature supplied to the proton-exchange membrane electrolysis unit was developed.

Vestnik of Samara State Technical University. Technical Sciences Series. 2023;31(2):70-84
pages 70-84 views
Functional content and architecture of software laboratory for ontological data analysis
Semenova V.A., Smirnov S.V.

The article presents the functionality and architecture of the software laboratory for ontological analysis and through this “prism” – the methodology of this analysis. The methodological complex of ontological analysis and the procedure for its application provide extraction from the data of multidimensional observations and measurements of the knowledge domain of its semantic model in the form of a formal ontology – a set of formal concepts, each of which is determined by extent and intent. In the set of formal concepts, a partial order is revealed (a binary relation of generalization) and intensional relations are revealed that reflect the connections between the elements of the concepts extents. The developed software laboratory differs from the well-known tools for constructing formal ontologies based on empirical object-feature data (i.e., based on data presented in the generally recognized form of a measurement results registration protocol), first of all, by taking into account the realities of accumulating information about the knowledge domain under study. In the general case, they cause the incompleteness and inconsistency of the initial data, for the processing of which the apparatus of multi-valued vector logic is involved. Another unique difference of the software laboratory is the consideration of a priori known (i.e., known before measurements) constraints on the properties existence during the primary processing of empirical data – binary relations of conditionality and incompatibility of objects properties of the studied knowledge domain. The presented software laboratory is implemented on the Excel table processor platform and the programming language Visual Basic for Application. The main motive for this choice was to ensure the availability and facilitate the familiarization of ontological data analysis technology by a very wide range of users who use Excel in their professional work.

Vestnik of Samara State Technical University. Technical Sciences Series. 2023;31(2):85-100
pages 85-100 views

Electronics, Photonics, Instrumentation and Communications

Ambient temperature impact on the parameters of the electrical circuit of sensing element in cluster eddy current sensor of metal chips in the lubrication systems of gas turbine engines
Belosludtsev V.A., Borovik S.Y., Korshikov I.G., Sekisov Y.N.

The detection of the wear particles in the engines’ lubrication systems is one of the most effective ways to assess the state of the bearing assemblies of machines and mechanisms. The most promising existing systems for online monitoring of wear particles are based on the eddy current methods for monitored parameters conversion. The reason is that such systems have the ability not only to determine the particle size, but also to recognize its magnetic properties, which makes it possible (under certain conditions) to localize the place of the defect development. At the same time, it is known that the ambient temperature changes in the monitored zone are one of the main external factors that have a significant impact on the informative parameters of eddy current converters. This is of particular importance for debris monitoring systems in high-power plants’ lubrication systems (e.g. gas turbine engine), where the oil temperature can vary widely (-50...+160 °C). The temperature impact on the parameters of the electrical circuit of sensing element in the cluster single-coil eddy current sensor of metal chips, which is a part of the debris continuous monitoring system prototype for high-thrust aviation gas turbine engine, is studied in the article. A typical design of the single-coil sensing element is considered. The study results of the temperature effect on the sensing element inductance, as well as on the parameters of the current lead that connects the sensing element to the matching transformer and to the measuring circuit are presented. Methods for reducing the impact of temperature changes in the monitored area on the parameters of the electrical circuit of the sensing element are proposed, too.

Vestnik of Samara State Technical University. Technical Sciences Series. 2023;31(2):101-117
pages 101-117 views
Study of the dependence of the natural frequencies of a rotor system with a vertically positioned rotor on the preload
Gasparov E.S., Marcosyan G.A., Kazakova O.Y.

The article discusses the possibility of using a method for determining the preload force for trust and radial bearings of spindle assemblies for high-speed milling. Previously, a method was developed and tested for determining the preload force of bearing supports on high-speed grinding electrospindles with a horizontal spindle.

The object of study is a support with angular contact bearings 7004 ACD_P4A SKF and a vertical rotor. An information-measuring system has been developed, which consists of PCB 352C34 vibration acceleration sensors, a Vishay 614 force sensor, an NI-cRIO-9056 controller, NI 9250, NI 9237 and NI 9481 modules, and software written in the National Instruments Labview language.

The system of test actions has been improved due to its automation. Test effects began to be carried out using a solenoid with a core, which was controlled by an NI controller and developed software. Due to this, the same time delay was formed between the test action and the start of recording the vibration acceleration signal.

Vibration acceleration signals are obtained for the entire preload range. To study the controllability of the unit, two vibration acceleration sensors were used: with a parallel and perpendicular arrangement of the axes of the direction of vibration and test action. For the first and second groups of vibration accelerations, spectral transformations were carried out, and the amplitude-frequency characteristics of the assembly were obtained for the entire range of preload values.

As a result of the work, it was concluded that the presented methodology and criteria are applicable to high-speed milling spindle assemblies with a vertical rotor. It is also shown that this technique can be automated.

Vestnik of Samara State Technical University. Technical Sciences Series. 2023;31(2):118-128
pages 118-128 views

Energy and Electrical Engineering

Factors affecting the prediction of auxiliary power consumption of the nuclear power plants
Vedernikov A.S., Shipilov A.S., Yarygina E.A.

According to the rules of the Wholesale Electricity and Capacity Market, a power plant is both a producer of electricity and its consumer, is obliged to form a forecast of electricity consumption to form an energy balance, and is financially responsible for the deviation of actual consumption from that given in the forecast. The first part of the article analyzes the accuracy of the existing method for predicting the auxiliary power consumption of one of the operating nuclear power plants. The calculation of various estimates of the forecasting error has been performed and it is shown that the method used in certain time intervals has insufficient accuracy. The second part analyzes the factors that potentially affect the auxiliary power consumption, evaluates the quality of the regression relationship between these factors and power consumption, and concludes that they are significant for the development of a new forecasting technique.

Vestnik of Samara State Technical University. Technical Sciences Series. 2023;31(2):129-141
pages 129-141 views

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