Volume 13, Nº 2 (2023)

Cyber-physical systems (CPS), along with cyber-biological and cybersocial systems, have recently become one of the key elements of modern infotelecommunications systems. The Internet of Things, as a revolutionary concept of the past few years, is a fundamental concept in the context of SPS. However, unlike the Internet of Things, which primarily emphasizes machine-to-machine connections, the SPS concept is based on the dualism of physical and cybernetic (information) environments. Turning to the applied field, we should note the trend towards informatization of many elements of the world around us. The degree of penetration ranges from sensors transmitting information about the state of a living organism to precise models describing the current state of an element within a smart production. This paper deals with the problem related to the control of cyber-physical systems under conditions where various random external influences are exerted on them. On the basis of game theory, the paper proposes, taking into account various criteria, to carry out the choice of control. Examples of calculations are considered.

The article discusses an efficient and automated way to import large amounts of data from Excel tables into a database. In various projects, there are tasks in which the flow of huge data, such as logs of program operations or manual operations performed at work sites, is vital for effective analysis.

Purpose – development of a module for automatic import of a large amount of data from Excel format into a database.

Method or methodology of work: the article discusses a method that implements automatic import of data from Excel tables into a Postgresql database.

Result: developed its own unique module that is able to process huge Excel tables and import them into a Postgresql database without manual operations.

Scope of the results: the data obtained, which are stored in the database, should be used to identify high-yield accounts for subsequent investment.

The article examines how the damping properties of the suspension system of a vehicle affect the process of forming a lateral reaction in the contact patch of a tire and the supporting surface. A mathematical model of a car quarter, a tire stretched string model, and a road surface microprofile generator were used in the study. The dependences of normal and lateral reactions along the distance traveled for three classes of roads were obtained with a change in the parameter characterizing the damping properties of the vehicle suspension. Mathematical statistics methods were used to analyze the dependences. It was found that the average value of the normal load changes little with a decrease in the damping properties of the suspension, while the standard deviation increases. The average value of the lateral force is reduced by 22%, with the standard deviation increasing by 1.6 times. The use of the Kolmogorov-Smirnov criterion for the analysis of implementations of lateral forces makes it possible to determine the permissible range of nominal values of the parameters of the technical condition of vehicle suspension shock absorbers.

Purpose. Obtaining and analyzing patterns that describe the change in the lateral reaction of a car tire when it moves under the action of a lateral force and suspension vibrations, as well as when changing the damping properties of a shock absorber.

Methodology. In the article were used the methods of mathematical modeling and also statistical methods of the analysis.

Results. Dependences have been obtained that characterize the influence of the damping properties of the suspension on the magnitude of the lateral reaction when the wheel moves along a road with bumps and under the action of a lateral force.

Practical implications. It is expedient to apply the received results by the organizations and institutions involved in the development of methods and means of diagnosing vehicles.

Tractors are technological energy means used for general mechanization and automation of agricultural production, as well as for the transportation of finished raw materials. Tractors of traction class 8 must have high productivity and efficiency, in order to achieve the best results, in the shortest agrotechnical time.

The need for the development of tractor designs of the 8th traction class is explained by current trends in the development of agriculture. The increase in the area of agricultural land sets manufacturers the task of increasing the speed of tillage, which entails an increase in the power and ergonomics of tractors.

The necessary traction and layout characteristics of energy-saturated tractors of traction class 8 allow the implementation of articulated frames. The main task of the design is the development of a articulated frame with a cab rotation mechanism that will be able to fulfill the requirements for modern tractors of the 8th traction class.

Purpose. Investigation of the forces of resistance to rotation of the articulated frame and the occurrence of a favorable moment for turning the cab using a model in the MATLAB Simulink environment.

Methodology. Methods of mathematical modeling and analysis were used in the article.

Results. The parameters showing the necessary forces for the rotation of the articulated frame and the occurrence of a favorable moment for turning the cab are obtained.

Practical implications. The results obtained can be applied in the design of a tractor on a articulated frame with a cab rotation mechanism.

The article discusses the automation of the business process of issuing a business trip based on the ECM system of platform solutions Directum using the example of an Russian organization engaged in energy sales activities. The purpose of the article is to design a module that will allow an employee to arrange a business trip without visiting the office, taking into account all the features of the legislative and regulatory framework and the capabilities of the corporate system.

The article is recommended to specialists whose work is related to the design of personnel workflow in the company.

Background. This article identifies the main tourist centers of the Arkhangelsk region; developed options for tourist routes and additions to tours; describes the specifics of the application; assessed the relevance of the application for JSC “Russian Railways” and third-party organizations.

Materials and methods. Methods of mathematical modeling, system analysis, comparison, systems theory, visualization, observation, statistical method were used.

Results: it is established that the development of the scientific and technological potential and the innovative ecosystem of the holding allows ensuring the effectiveness of the company’s activities taking into account technical, technological, economic, socio-political challenges in the domestic and foreign markets.

Conclusion. The article proposes the concept of a virtual platform in the field of passenger multimodal transportation, where the passenger himself could prepare a tourist trip taking into account individual needs.

Background. Currently, there is a process of redistribution of existing cargo flows, an active search for new alternative options for cargo delivery is underway, new logistics chains are being formed. In the rapidly changing conditions of the functioning of the country’s economy, the importance of road and rail transport is increasing. Road transport is the fastest–changing channel in the development of new transport chains. The importance of rail transport also remains very high, especially when transporting goods over long distances. Improving the efficiency of logistics companies in the construction of new transport corridors directly depends on the choice of the company’s business strategy and the development of the company as a whole. The purpose of the current study was to optimize the activities of logistics companies by determining the feasibility of developing its own fleet of rolling stock, warehouses and terminals of a logistics company.

Materials and methods. Methods of system analysis, comparison, systems theory, logistics, outsourcing, as well as the architecture of logistics systems with the participation of providers were used. The tools for evaluating the efficiency of logistics companies are presented, which allow us to draw conclusions about the required number of transport infrastructure facilities, about the choice of the type of transport necessary for the full development of a given cargo flow in new supply chains.

Results. The analysis of the method of minimizing the costs of logistics companies, using the method of comparative analysis, which takes into account the costs of maintaining transport infrastructure facilities, the costs of maintaining and servicing vehicles, the costs of organizing transportation, by searching for the break-even point of a logistics company.

Conclusion. A methodology has been developed for assessing the feasibility of involving a logistics provider in the implementation of transportation and transferring part of the work to it on outsourcing terms.

Background. The relevance of the research is determined by the tarnsformation in the modern educational process of the role of students’ attitudes, subjective norms and perceived behavioral control in the implementation of augmented reality applications for digital learning. The article is devoted to the study of the question: “How does conducting lectures through an extended application increase students’ confidence and affect their attitudes and subjective norms?”

Materials and methods. Computer graphics and 3D modeling methods, Vuforia tracking development tools, Unity application development tools, as well as methods of system analysis, comparison, systems theory, as well as materials from open sources on the Internet were used.

Results: The analysis of didactic tools and technology “augmented reality” when implemented in an innovative educational process using digital educational solutions.

Conclusion. The expediency of integrating innovative educational technologies using augmented reality into the educational process has been studied. A unique digital solution ready for operation is proposed: an information and training program based on the use of augmented reality technology.

Background. The article is devoted to the description of the design modeling of the brake testing point with its further modernization into a maintenance point at a passenger station in the St. Petersburg transport hub.

Materials and methods. Materials from open Internet sources, logistics theory, systems theory, systems approach, project modeling, economic justification, comparison “as is” and “as will be” were used.

Results. Based on the results of the analysis of the average downtime of one train during maintenance at the service station, the economic effect was determined.

Conclusion. Based on the results of the study, a solution was proposed for the organization of a maintenance point at the St. Petersburg – Finlandsky railway station with an appropriate feasibility study. With the application of the proposal, it is possible to improve the quality performance of the railway and optimize costs. It has been established by calculation that the presence of a technical service point at the St. Petersburg – Finlyandsky railway station will allow trains to move along a given route without the need for a secondary technical inspection at the St. Petersburg – Sortirovochny – Moskovsky station.