Igor Egorov
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View article: The influence of the "guarantee agreement" issue on the dynamics of Soviet-Estonian relations in the 1920s-1930s
The influence of the "guarantee agreement" issue on the dynamics of Soviet-Estonian relations in the 1920s-1930s Open
The subject of the research is the characteristics of Soviet-Estonian relations in connection with the problem of ensuring the security of Northwestern Russia during the interwar period. Throughout the 1920s, the Soviet leadership regularl…
View article: Images of the Cold War and Their Reflection in Modern Popular Culture
Images of the Cold War and Their Reflection in Modern Popular Culture Open
The information image is of great importance for the life of an individual, social groups and entire communities, because it is used to perceive and comprehend the realities of the surrounding reality. Its formation, replication, as well a…
View article: Cold War Imagology: «Their» and «Strangers» in the Popular Culture of the 1980s
Cold War Imagology: «Their» and «Strangers» in the Popular Culture of the 1980s Open
The Cold War period of the second half of the 20th century coincided with the era of rapid development of mass communications, which, in turn, contributed to a significant expansion of the possibilities of indirect information impact on th…
View article: Increasing of Air Engine Efficiency Basing on Optimization Technology
Increasing of Air Engine Efficiency Basing on Optimization Technology Open
At present NPO Saturn possesses the complex of technologies, which allow obtaining the most efficient technical solutions when creating up-to-date gas-turbine engines and their components. In this paper there are presented the examples res…
View article: European Integration Processes in EECCA: Dependencies and Drivers
European Integration Processes in EECCA: Dependencies and Drivers Open
The study was conducted using comparative quantitative and qualitative analysis of World Bank and International Monetary Fund data for 1989-2020 and 2000-2020. Two-factor linear econometric models of economic growth in 11 countries of Cent…
View article: The Main Vectors for the Development of Estonian National Policy in the Late XX - Early XXI Centuries
The Main Vectors for the Development of Estonian National Policy in the Late XX - Early XXI Centuries Open
The practical foundations of the national policy of modern Estonia were laid in the conditions of the collapse of the USSR and the associated aggravation of interethnic relations. The contradictions of this period largely influenced the de…
View article: On the choice of the initial approximation in the numerical solution of parametric optimization problems
On the choice of the initial approximation in the numerical solution of parametric optimization problems Open
Background. In recent years, the complexity of the applied problems of parametric optimization has increased significantly. Since computational possibilities are finite, it is necessary to look for ways to increase the efficiency of the op…
View article: AERODYNAMIC AND STRENGTH IMPROVEMENT OF THE AXIAL TURBINE OF A HELICOPTER GTE
AERODYNAMIC AND STRENGTH IMPROVEMENT OF THE AXIAL TURBINE OF A HELICOPTER GTE Open
The paper presents the results of solving the complex problem of improving strength and efficiency of a single-stage axial turbine of a small-sized helicopter GTE using multidisciplinary optimization methods. An analysis of the initial tur…
View article: The Digital Twin is an Artifact of Modern Production Systems
The Digital Twin is an Artifact of Modern Production Systems Open
The development of modern production systems is taking place in the context of the transition to the concept of Industry 4.0. In these conditions, the competitiveness of production systems is determined by the volume and depth of implement…
View article: Multi-level model of the centrifugal compressor workflow for its effective optimization
Multi-level model of the centrifugal compressor workflow for its effective optimization Open
The paper presents the main ideas of the virtual test bench concept for rapid obtaining of the reliable characteristics of compressors based on a multi-level mathematical model with a two-step identification using data obtained from mathem…
View article: Creating a multi-level model of a centrifugal compressor for a digital analogue of the gas turbine engine
Creating a multi-level model of a centrifugal compressor for a digital analogue of the gas turbine engine Open
The paper presents the main ideas of the virtual test bench concept for rapid obtaining of the reliable characteristics of compressors based on a multi-level mathematical model with a two-step identification using data obtained from mathem…
View article: Optimization of geometry blade for modern high pressure compressor
Optimization of geometry blade for modern high pressure compressor Open
An integration of CFD-3D codes and modern efficient methods of optimization is essential for the contemporary compressors improvement. In order to solve optimization tasks the insular information exchange circle was created. The data circu…
View article: Optimization of a three spool axial compressor to increase the efficiency of a gas turbine engine
Optimization of a three spool axial compressor to increase the efficiency of a gas turbine engine Open
The paper provides a description of the algorithm, an example of a specific task, and the results of the optimization of a 15-stage three-spool compressor for a ground-based GTU by the efficiency criteria of the engine. It can be performed…
View article: Experimental Compressor Multidisciplinary Optimization Using Different Parameterization Schemes
Experimental Compressor Multidisciplinary Optimization Using Different Parameterization Schemes Open
The present-day compressors development is a labor-intensive problem, because compressor structure should meet different requirements to the design characteristics. It’s reasonable to find optimal combination of compressor design parameter…
View article: Gas Dynamic Modernization of Axial Uncooled Turbine by Means of CFD and Optimization Software
Gas Dynamic Modernization of Axial Uncooled Turbine by Means of CFD and Optimization Software Open
The results of multicriteria optimization of three-stage low-pressure turbine are described in the paper. The aim of the optimization is to improve turbine operation process by three criteria: turbine outlet flow angle, value of residual s…
View article: Improving of the working process of axial compressors of gas turbine engines by using an optimization method
Improving of the working process of axial compressors of gas turbine engines by using an optimization method Open
The article presents one optimization method for improving of the working process of an axial compressor of gas turbine engine. Developed method allows to perform search for the best geometry of compressor blades automatically by using opt…
View article: Self-organizing maps for pattern recognition in design of alloys
Self-organizing maps for pattern recognition in design of alloys Open
A combined experimental–computational methodology for accelerated design of AlNiCo-type permanent magnetic alloys is presented with the objective of simultaneously extremizing several magnetic properties. Chemical concentrations of eight a…
View article: Nonlinear Correction of Bilateral Remote Control Systems within a Mobile Robot Pipeline
Nonlinear Correction of Bilateral Remote Control Systems within a Mobile Robot Pipeline Open
We consider the problems of non-linear correction efforts reflection channels and position control systems, two-way position-force control of the mobile robot movement in the pipeline with variable geometry.
View article: Structure of System Position–Force Control of the Drive Stewart Platform
Structure of System Position–Force Control of the Drive Stewart Platform Open
The article deals with the device in the form of Stewart platform with adaptive, robust control and fuzzy logic control. It 'describes electric rods. The algorithms and systems of position-force control with variable structure are consider…