bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of an application of a pipeline network calculation
Authors: Kharitonova O S , Volodchenko T V , Bronskaya V V , Ignashina T V , Balzamov D S , Khairullina L E , Minnegalieva Ch B
Published: May 2020

The main stages of development of a pipe network calculation application at the coding level in C# language are presented. Databases are implemented by Microsoft SQL Server. Visual Studio was used as an integrated development environment for code writing, as well as a rich set of control elements written using .NET Framework. The necessary solutions for the task was developed after complementing the functionality of these code control elements.
Project for implementing an information system as a result of interaction between participants in the cluster for forest waste processing
Authors: Ragozina M A , Anikina Yu A , Malanina Yu N , Levko V A
Published: May 2020

The business processes of any modern organization as a result of the interaction between participants of the forest waste processing cluster are closely related to information technology. The article deals with the project of introducing an information system, which turns out to be a serious transformation, affecting various areas of the enterprise, ranging from the reflection of core activities, ending with regulations for user support. The information system implementation project is divided into the main stages, during which the requirements for the system are formed, changing business processes are considered, a model of the future system is created and put into pilot operation.
Big data technologies in environmental monitoring
Authors: Yu Piskorskaya Svetlana , Malanina Yulia N
Published: May 2020

The article deals with the big data technologies currently used for environmental monitoring. The processes of accumulation and preservation of super-large data sets, technologies for working with them, and a paradigm shift in science are presented. A predictive function of big data has been identified that allows effective use of this technology in environmental monitoring. A general idea of environmental monitoring as a complex system of observations, assessment and forecast of changes in the environmental state has been formed. The main areas of environmental monitoring are identified. As an example, the activity of collecting, processing and storing big data in the framework of the strategic project “Geographic Information system “Yenisei-Arctic”, implemented by the employees of Reshetnev Siberian State University of Science and Technology. The main tasks and results of the project are presented. Among the main results of the project, the formation of a research direction in the field of big data and the involvement of young scientists and students in promising research that can prepare the necessary information for the needs of environmental monitoring is highlighted. It is proved that big data technologies can raise environmental monitoring to a whole new level.
Innovative approach to training industry 4.0 experts
Authors: Savelyeva Marina , Shumakova Natalia
Published: May 2020

The research concerns the changing requirements to a new generation of experts demanded by Industry 4.0. Rapid technological development of the enterprises, digitalization of their processes galvanize the universities to adapt their approaches to both students, training technology and quality control management. Moreover, we compared manufacturing process with the educational one, analyzing the possibilities of the currently developed teaching technology to comply with the enterprises’ demands.
Methods of processing data from space monitoring of wild processes on the Earth’s surface
Authors: Dorrer Georgy
Published: May 2020

A methodology for modeling dynamics and controlling the fight against wild processes on the Earth’s surface on basis the space technologies is proposed. Large forest fires considered as important illustration of such processes. A simple mathematical model proposed that describes the dynamics of the area covered by the spontaneous process, as well as actions to stop this process. Examples of calculating the parameters of real wildfires are given. An experiment on predicting the dynamics of a large wildfire using a neural network based on space monitoring data, as well as data from territorial divisions of forest guard enterprises and the Ministry of Emergencies are describing. It is shown how, according to the dynamics of the area occupied by the spontaneous process, is possible to estimate its configuration, as well as the intensity of the impact on it.
Using the MathCAD program to automatically generate the models of doubly fed inductor motor
Authors: Bronov Sergej , Avlasko Pavel , Nikulin Nikolaj , Bisov Aleksej , Krivova Darya , Stepanova Elena
Published: May 2020

The doubly fed inductor motor can be used in low-speed electric servo drives. Its mathematical model is obtained based on the well-known theory of electric machines. These models are usually created manually and therefore contain many simplifications. But in precision electric drives it is required to simulate the processes taking into consideration real non-ideal parameters of windings and motor voltages. In this paper it is proposed to apply the MathCAD program to form the models of a doubly fed inductor motor. The fragments of the MathCAD program worksheets with the results of symbolic computation are presented. A three-phase mathematical model of a doubly fed inductor motor with the conversion to a two-phase model for arbitrary parameters of windings and voltages is obtained. These models are new and have not been previously reported in any literature.
Security challenges of the Industry 4.0
Authors: Mentsiev Adam U , Guzueva Elina R , Magomaev Tamirlan R
Published: May 2020

Industry 4.0 or the fourth industrial revolution is the defined as the latest digital transformation that our manufacturing and production industry is going through during the modern day and will continue to do so for the next decade or so. But with this transformation, there are a number of challenges associated and most of these challenges are related to cybersecurity. This research is based on a gap analysis which identifies these challenges that stand in the way of Industry 4.0 revolution. These challenges related to security and privacy fall under different categories and each needs to be discussed. Some of these categories include people, processes and technologies. The paper then also provides recommendations to each of this challenge of every category. The recommendations are also based on the people they are addressed to. Before to dive into these security and privacy challenges there also considered what this fourth industrial revolution is and how is it going to change our industry.
The use of geographic information systems for forest monitoring
Authors: Korchagina I A , Goleva O G , Savchenko Y Y , Bozhikov T S
Published: May 2020

In the article, the authors consider the need to use geographic information systems and remote zoning data for better and more effective forest monitoring. Each plant on our planet has the ability to reflect or absorb light waves. As a technology for monitoring forests, the method of visualization of the normalized vegetation index (NDVI) is used, which is also called the relative index of vegetation. Today, NDVI is the most common index for solving problems using quantitative estimates of vegetation cover. Each range of values is able to identify a specific object. All spectral values are stored in a special database and are inextricably linked with the coordinates on the resulting map. Files with maps and spectral values are in HDF format. Satellite images that allow you to work with the NDVI index are created using various instruments, one of which is a scanning image sensor – MODIS spectroradiometer. The introduction of the proposed technology will significantly increase the mobility and effectiveness of monitoring. The implementation of remote sensing results in the analysis of the state of forests based on the use of the normalized difference vegetation index (NDVI) is based on the interconnectedness of surface estimates and analytical interpretation of satellite images. The user gets the opportunity to select the format of the exported file, as well as highlighting the desired section of the observed area. The necessary spectra are filtered to find NDVI and other vegetation indices.
Polycyclic aromatic hydrocarbons in bottom sediments of an inner-city lake in the zone of discharge of surface runoff
Authors: Latypova V Z , Nikitin O V , Sabanaev R N , Safarova V I , Stepanova N Y
Published: May 2020

The study determined the content of polycyclic aromatic hydrocarbons (PAHs) in the bottom sediments of an inner-city Sredny Kaban Lake (Kazan, Russia) in the places of the organized release of untreated surface stormwater runoff within the catchment of the city. The content of 15 PAHs included in the priority list of PAHs for environmental research in the Russian Federation and in other countries was experimentally studied. The average content of the total PAHs studied (333.4 μg/kg) in the bottom sediments of the lake indicates a low degree of pollution. The analysis of the ratio of the content of individual PAHs reveals the main sources of their entry: fuel combustion (vehicles) and oil pollution of the surface water. Benzo(g,h,i)perylene and Benz(a)pyrene represent the largest contribution to the hazard coefficient of all studied PAHs for bottom sediments of the studied water body. Bottom sediments are composed mainly of particles with a size of 1–100 μm; the contribution of particles with a size of 0.1–1 μm was estimated to be up to 1%.
To the evaluation of the parameters of the regression equation between the radiometric and geological testing
Authors: Ivanyukovich G A , Malafeyev O A , Zaitseva I V , Kovshov A M , Zakharov V V , Zakharova N I
Published: May 2020

Comparisons of the regression equation between two methods for testing rocks and ores at the Dukat gold-silver deposit are made using two algorithms. In the first loss function defined by the sum of squares of residuals (deviations from the values of the dependent variable of the regression line), in the second - the sum of the absolute values of the residual normalized to sum values of the dependent and independent variables. As a result, it was shown that in the first case, in order to increase the accuracy of estimates of the coefficients, it is necessary to exclude observations in which the absolute value of the residuals normalized to their standard deviation exceeds the critical level of 5-7. In the second case, it is stable to sample formation and the number of observations can be reduced by 2-3 times. Under these conditions, the error in the estimates of the coefficients turns out to be close.
One-phase elliptic solutions of the nonlocal nonlinear equations from AKNS hierarchy and their spectral curves
Authors: Smirnov A O , Aman E E
Published: May 2020

After publishing the pioneering works of Ablowitz and Musslimani, other authors also began active research on nonlocal forms of classical integrable nonlinear equations. They usually investigate particular equations, and for these equations they construct solutions that are expressed in terms of elementary functions. In present paper, we investigate one-phase elliptic solutions of all the equations from the AKNS hierarchy, including mixed ones. We also analyze the properties of spectral curves of the considered one-phase solutions in order to be able to construct multiphase algebro-geometric solutions of nonlocal forms of the AKNS hierarchy equations in the future.
Automatic balancing devices of rotors of the knife refiners
Authors: Vikharev S N
Published: May 2020

The paper considers automatic balancing devices for knife refiner rotors which rotate in a two-phase or three-phase medium. The total imbalance of the mill rotor consists of mechanical, hydraulic and hydrodynamic components. The main component is mechanical imbalance, which changes during operation due to uneven wear of the headset. It is recommended to use automatic rotor balancing devices in the designs of these machines. These devices allow compensating for the mechanical component of the rotor imbalance without stopping the mill. A mathematical model and designs of automatic balancing devices for mill rotors have been developed. The proposed calculation method and design of automatic rotor balancing devices can be used in other machines, for example, in centrifugal pumps.
Topological optimization by designing structural elements of logging machine manipulators
Authors: Dolmatov S N , Kolesnikov P G
Published: May 2020

The structures of manipulators of modern logging machines are subject to a wide variety of requirements related to the implementation of the functions of these machines, as well as the technology of manufacturing, operation and disposal of structures. The leading requirements are to ensure high strength and operational reliability under a wide range of loads, high and low temperatures. In this case, it is necessary to obtain the minimum metal consumption of the design product. Structural optimization, in particular, topological optimization, should be used when 9designing manipulators for logging machines. The use of topological optimization makes it possible by calculation to carry out the redistribution of material in the calculation area of the design product, taking into account the required conditions. The use of Altair Inspire 2018.3 software tools makes it possible to reduce the weight of the designed structural element of the hydraulic manipulator of the forestry machine by 39%. At the same time, acceptable indicators of tensile strength, deformation, and standard safety factors are provided.
Determination of the traction performance of the working body of the subsoiler in the soil environment depending on the working body configuration and the selected soil model
Authors: Khudayruliev R R , Djuraeva N B , Urinov A P , Mirzaeva M M
Published: May 2020

The cultivated soil environment changes its structure and is deformed; therefore, the considered model of the processes of interaction of the working body with soil remains understudied. The influence of soil criteria on the working body behavior can be taken into account through its density and tensile strength. To describe the movement of the soil near the leg during finite deformations, a plastic medium model proposed by academician Kh.A. Rakhmatulin and simplified equations obtained on the basis of the hypothesis of flat sections were used. It has been established that, depending on the coefficient of internal friction and soil adhesion, a zone of increased soil density can form near the working body of the cultivator, where a significant increase in resistance force is observed. The calculations were carried out based on the methods of mechanics of a deformable solid, soil mechanics, and were performed in the Maple-8 programming environment.
Reliability of plate of knife refiners
Authors: Vikharev S N
Published: May 2020

The subject of the researches is reliability of plate of knife refiners. Mathematical model of reliability connecting technical resource of plate with the major factors influencing reliability is offered. Influence of regime, operational, efficiency and protective factors is considered. Recommendations about increase in reliability of plate are developed. Offered technique of reliability research can be used in other machines, for example, in centrifugal pumps.
Evaluation of the stressed-deformed condition of the cylindrical shell of the separator under corrosion wear
Authors: Rubtsov A V , Mukhametzyanov Z R , Kulakov P A , Arkhipova K S
Published: May 2020

Separators are operated at elevated working pressures and temperatures, as well as the simultaneous presence of liquid and gaseous working media that have an aggressive effect on the metal. With the combined action of workloads and exposure to a corrosive environment during operation, the development of defects such as general corrosion, stress corrosion cracking, ulcerative corrosion, etc. In order to determine the technical condition of the apparatus, the main mechanism of damage of which is corrosion, it is necessary to measure wall thicknesses, the minimum value of which is regulated by the current regulatory and technical documents on industrial safety. The presence of such uncontrolled areas does not fully provide a reliable picture of the assessment of the technical condition, and the actual stress-strain state of the entire shell is not taken into account, depending on the design of the apparatus, the presence and location of process fittings, the degree of corrosion wear, etc. In this paper, we study the relationship between the impact of operational loads, the influence of the location of technological fittings on the stress-strain state of the cylindrical shell of the separator during its corrosion wear.
Investigation of nitrogen oxides in the cylinder of a gas-diesel engine
Authors: Likhanov V A , Lopatin O P
Published: May 2020

The paper presents the results of studies of the volume content and mass concentration of nitrogen oxides in the cylinder of a diesel engine running on a gas-diesel process. At the same time, the fuel supply through the gas-diesel process was carried out in the following proportions: natural gas -80%, diesel fuel - 20%. According to the results of the research, a reliable reduction in the content of nitrogen oxides in the cylinder of a diesel engine running on a gas-diesel process was noted.
Phenomenology of nitrogen oxides formation in a gas-diesel engine
Authors: Lopatin O P
Published: May 2020

A zone model of the process of nitrogen oxides formation in a gas diesel cylinder when working on natural gas with exhaust gas recirculation is considered. The presented phenomenology of combustion of diesel fuel injected through a nozzle with five holes in methane-air mixture with products of exhaust gas recirculation in the combustion chamber of a diesel engine running on natural gas with recirculation of exhaust gases, where the behavior of processes and components distribution of nitrogen oxides is significantly different. For clarity, the selected zones of nitric oxide formation are schematically presented in the work as a graphic image.
Evaluation of the accuracy of the ship location determined by GPS global positioning system on a given sea area
Authors: Nguyen T D
Published: May 2020

The current location of navigation and navigation depends heavily on global satellite navigation systems, mainly GPS (Global Position System). In actual maritime practice, the position of the ship is determined to be the most probable position and will be the center of the circle of probability containing the ship’s position. However, this is not entirely accurate because the exact position on the chart depends on many factors such as deviation of the geodetic system, the accuracy of the chart, etc. On the other hand, the probability circle contains the location. The ship is scalar, the radius of error of the probability circle depends on many factors, etc. Therefore, determining the probability location with the highest accuracy is a rather complex problem. In particular, in the waters where the safety system is not complete, the level of survey is not good: Solomon Islands, Papua New Guinea, Indonesia, Cambodia, Vietnam, etc. actual errors of GPS location operating above. The chart is much larger than the error recommended by the manufacturer. In the context of the article, the author proposes a method for determining the probability area containing the actual ship position and its orientation to improve high safety in manoeuvring and navigating vessels at sea, testing on coastal Vung Tau - Vietnam.
Research of the screw working element working jointly with the planner’s bucket
Authors: Norov Sobir N , Abrorov Akbar S , Hamroeva Matluba F , Muxamedjanova Sarvara F , Zaripov G’olib B
Published: May 2020

The article covers theoretical attempts to determine the productivity and some other parameters of the screw working element, working jointly with the planner’s bucket in order to improve the field floating process that meets the agrotechnical requirements of the pre-sowing background. This article shows the change in the performance of the screw working element depending on the speed of rotation of the screws and on the diameter of the screw. Based on this work we conducted selective experiments with the experimental sample of the mini planner
Wavelet decomposition algorithm for machine learning model in wind turbines
Authors: Pukhova M , Lopatin E , Sokolinskaya N , Tarakanov S
Published: May 2020

The paper considers the wavelet decomposition for machine learning model to solve the problem of analyzing the shape of vibration signals in wind energy turbines. The questions of training and optimization of the parameters of the classmate method are highlighted. The principle of constructing a training sample is described. The algorithm for the instance recognition of circuit elements by vibration signals removed from wind turbines. Thus, the method of recognition of equipment elements based on sparse wavelet decomposition of vibration signals can be used in practical renewable energy. The research results will stimulate of the development of generating facilities based on wind energy with an installed capacity of up to 15 kW will contribute to the stimulation of the development of wind power with a vertical axis in the urban environment.
Safety system for space vehicles using integrated devices located outside of the satellite platform
Authors: Kartsan I N , Shumakova N A , Zhukov A O , Platonov O A , Efremova S V
Published: May 2020

The article presents a system for detecting space objects using integrated devices located outside the satellite platform, which can significantly expand the possibilities of creating micro-consuming small-sized high-temperature and radiation-resistant radar systems of autonomous small spacecraft as part of satellite groups to solve the tasks.
Determination of the endurance limit of structural elements of fixed offshore platforms with accumulated damage based on experimental studies
Authors: Starokon I V
Published: May 2020

Russia has a large number of fixed offshore platforms, which were built during the Soviet era and are in operation for more than 20 years. In connection with such a long life platform for a long time was exposed to various loads that cause stresses and variables as a consequence of fatigue damage. In connection with this very urgent becomes the problem of estimation of residual resource of elements of the platforms with consideration of cumulative damage. Obviously, the residual resource it is long maintained elements of platforms subjected to intense impact, will differ from that caused by changes in the metal structure and the accumulation in it of fatigue damage. In this article the solution to the problem of determining the fatigue limit for the elements of the platforms with accumulated damage based on the experiments is proposed.
Study of a swirling gas jet emanated from a vortex jet gripper onto a plain barrier
Authors: Konishcheva O V , Briukhovetskaia E V , Brungardt M V , Shhepin A N , Kudrjavcev I V
Published: May 2020

The interaction of a swirling gas jet emanated from a vortex jet gripper (VJG) onto a plain barrier, and particularly the rarefaction in the gripping area and the impact made by various parameters (compressed air pressure at the inlet, gap size in the contact area) on its value are investigated. The compressed air jet suction force, capable of suspending a flat disc, is determined. The mathematical model determining the picture of jet flow within the system chamber, as well as in the area of contact with the suspended object, is presented.
Study of external impacts on composite materials
Authors: Baidakov D I , Yu Komarova L
Published: May 2020

This article proposes a method for studying external impacts on the components of a composite material and on the material as a whole. The method is based on the analysis of digital micrographs of composite samples’ cross-section at the edge. Results of the analysis show the changes in the parameters of the composite’s different sections and of the composite material as a whole, caused by various types of external impacts.
Seed distribution by the coulter for the subsoil broadcast seeding
Authors: Alekseev E P , Maksimov I I , Terentev A G , Maksimov E A
Published: May 2020

The article studies the efficiency of the subsoil broadcast seeding of grain crops, which differs from other methods with the way seeds are placed into the soil: not in rows but on the whole distributing width. This method is also determined by the evenness of seeding depth by placing the seeds on the ready hard spot, which provides equal conditions of heat, light, water, food and gas supply that influence seed sprouting, seedling formation, tillering, shooting, head formation, earing, blossoming, kernel milk line formation, middle dough and fully ripe stage development. The analysis of coulter with active and passive distributors has been conducted. The use of air flow during the transportation of seeds from the sowing device to the coulter and the distributor oscillating process is recommended for the higher quality seed distribution below the spinning wheel. The oscillations of the elastic tube – distributor under the influence of the air-grain mixture have been theoretically studied. The obtained results allow creating dependency diagrams of oscillation frequency ω and damping parameter h. The experimental research has been made to study the evenness of seed distribution with the help of the coulter with the elastic tube – distributor.
The influence of polyethylene processing on the plastic containers blowing
Authors: Antypas I R
Published: May 2020

The materials of this article are devoted to the study of the influence of polyethylene processing on the plastic containers blowing. The aim of the study was to investigate the influence of one-time processing on the properties of high-density polyethylene, used for packing of mineral oils, as well as the indication of opportunities to use recycled material in the manufacture of new packing. The material used in the study was high-density polyethylene (HDPE) and recycled polyethylene. In the course of research, it was found that the processing led to a deterioration of the thermal properties of the polymer material, and the difference in the amount of liquidity of raw materials compared with processed, was 47.7%, which is consistent with reference studies. The conditions used during the blowing process resulted in uniformity of the final product in thickness. The difference in wall thickness of products made from raw material and recycled material was within 0.02 mm. The smallest thickness of finished products was 0.66 mm for recycled material and 0.68 mm for raw materials.
Economic assessment when creating a comfortable operational environment for a mining excavator operator
Authors: Velikanov V S , Dyorina N V , Rabina E I , Yu Zalavina T
Published: May 2020

Ergonomic studies aimed at ensuring competitiveness and compliance with the requirements of ergonomic standards of modern samples of traditional (mechanized) mining equipment will improve the reliability of the human operator. At the same time, it will allow creating the creation of comfortable and safe conditions for operators of remote-control devices for mining machines and dispatch centers for managing robotic mining equipment. The article presents economic assessment of measures when creating a comfortable working environment for a mining excavator operator.
Method of adaptive gripper drive control signal formation
Authors: Zhdanova Yu I , Moshkin V V , Zhidenko I G
Published: May 2020

Anthropomorphic gripper is basic component of anthropomorphic robots determining its functionality. Structural scheme provides reliable interaction with nondeterminate external objects. Each actuating system has three output links realizing three degrees of freedom. Movement through individual motors increases gripper dimensions. It determined designing of new type grippers with group drive in actuating system. Interaction between actuating system and external objects realizes in two stages: grasping and holding. In grasping the links execute motions consequently from proximal to distal, output parameters are angles of their relative rotation. Control is performed according to open circuit. actuating system can grasp external objects in nine ways. In holding the output parameter is a force created by the last link got in touch with external objects. Formation of control signal for closed loop control realization includes: registration of links rotation angles, revelation of output link, formalization of calculated parameters. Then the second stage actions are performed: calculation of reduced moment according to required force on output link, control of moment on motor providing minimization of noncoincidence between actual and indicated value. The first stage operations are common for all anthropomorphic robots constructions. Calculated correspondences of the second stage are determined by individual characteristics of applied motion transmission system.
The influence of the environment on the temperature state of structural elements of offshore stationary platform
Authors: Starokon I V
Published: May 2020

Offshore fixed platforms (OFP) are exposed to solar radiation, which leads to their heating. In turn, a change in the thermal state (TS) of the structural elements (SE) of the support block leads to the appearance of different temperature stresses in direction and magnitude, the analysis of which was carried out by the author in the work. Previously, the author developed a technique that allows you to calculate the temperature of the SE of the reference block without taking into account the influence of the environment. This article provides an augmented technique that allows you to evaluate this effect both in conditions of free and forced convection. In addition, a correction factor is introduced into the formula for estimating the surface temperature of elements, taking into account their degree of blackness. On the basis of the developed methodology, an example of calculating the thermal state of the SE of OFP in the Black Sea is given. The difference between the TS columns, braces and horizontal elements is revealed.
The effect of methanol combustion with separate feed in a diesel engine on emissions of toxic components
Authors: Anfilatov A A
Published: May 2020

The results of the possibility of using methanol as an alternative fuel for tractor diesel engines are presented, as well as solving problems to reduce emissions of nitrogen oxides and other toxic components in exhaust gases. The most effective way to use methanol in internal combustion engines at present is to feed it directly into the cylinder of a diesel engine using a separate feed, which allows replacing up to 80% of oil fuel. The ignition of methanol in this case occurs due to the supply of a pilot portion of diesel fuel. This method, with some changes and additions to the design of a diesel engine, can be implemented on engines already in operation. Power and economic indicators, the content of toxic components in the exhaust gases when operating on diesel fuel and methanol with a separate feed, depending on the load change, were investigated and determined in detail. When replacing diesel fuel with methanol with a separate feed in a diesel engine, it is possible to achieve a 32% reduction in the content of nitrogen oxides in the exhaust gases and 86% on soot.
High-temperature installation for testing composite ceramic materials on the friction and wear behaviour
Authors: Roshchin M N
Published: May 2020

The paper considers the design of a high-temperature testing unit for testing composite ceramic materials on the friction and wear behaviour. The friction mode of the samples is provided according to the finger scheme in the temperature range of 20 - 1000°C under the conditions of the normal load range of 35 - 300N. Linear speed, in terms of rotational motion, when testing samples is 0.05-0.37 m/s.
The effect of changing the spray angle of the irrigation device on the spray diameter
Authors: Antypas I R , Dyachenko A G , Savostina T P
Published: May 2020

The paper is devoted to the research in the field of the effective application of the main working elements of sprinkler machines showing the influence of their basic capabilities on each other. The aim of the study was to develop and improve the performance of irrigation systems for the possibility of irrigation process optimization. As a result, it was found that the ratio between the spray angle and its maximum height at different pressures is equivalent to the second-order parabola equation. The inferred expected dependencies between the radius and the spray angle can be used to determine the degree of spray due to the inclination of the spray tube, which leads to a change in the spray angle when it rotates around its axis and, thus, the degree of spray and the shape of the irrigated area.
Oscillating method for monitoring the technical condition of the hydraulic cylinders of manipulator machines
Authors: Pavlov A I , Tarbeev A A , Egorov A V , Polyanin I A , Ya Alibekov S , Lysyannikov A V , Kaizer Yu F , Matkerimov T Y
Published: May 2020

The substantiation of the oscillatory method for monitoring the technical condition of the hydraulic cylinders of manipulator-type machines is presented on the example of the boom hydraulic cylinder of a John Deere 1470 forest machine. The results of numerical simulation of dynamic processes in pressure cavities of hydraulic cylinders of manipulator-type machines are described on the basis of a developed mathematical model based on the method of theoretical description of the hydraulic drive structural components using hydromechanical circuits. The hydraulic system of the hydraulic drive boom was adopted as the calculated one. For the formation of dynamic processes in the pressure cavity of the hydraulic cylinder of the boom drive of the described machine, a shut-off valve installed in the drain line is used. This valve made it possible to provide an almost instantaneous stop of the piston, resulting in a hydraulic shock. The calculations also used the method of forming a hydraulic shock with an almost instantaneous stop of the piston at the end of its stroke. The research allowed us to justify the most informative parameter for monitoring the current technical condition of hydraulic cylinders in the functional mode-the logarithmic decrement of damped oscillations, as well as to develop a new hydro-shock method for monitoring the technical condition of hydraulic cylinders.
Wheeled tractors adaptation to zonal tillage technologies
Authors: Selivanov N I , Kuznetsov A V , Averjanov V V , Kaizer Yu F , Egorov A V
Published: May 2020

The purpose of the work is the substantiation of experimental assessment methods of parameter adaptation and operating modes of 4x4 wheeled tractors to zonal tillage technologies. The adaptation of wheeled tractors to zonal technologies of soil cultivation is based on the scientific structure and laboratory-field and operational and technological tests that determine the effectiveness of their functioning as part of soil cultivating units when changing adapter parameters that are controlled before the start of the technological process and during the working stroke. The information technology system for recording impact factors and optimized parameters was justified during traction and production tests. An algorithm and mathematical models of practical adaptation of tractors to zonal tillage technologies in terms of net productivity, specific energy costs and fuel consumption per unit of work performed are formulated in current paper.
Elastic bend of twisted waveguide
Authors: Kudryavtsev I V , Brungardt M V , Gotseluk O B , Rabetskaya O I , Sharonov A A
Published: May 2020

The construction of any antenna-feeder system, in addition to providing radio technical parameters, must has the specified strength and rigidity under operational loads. This paper considers the stress and deflection of a twisted waveguide at bending as the most common and dangerous type of loading. According to the technical theory of beams, obtained equations which describing the integral characteristics of the across section as well as stresses and deflections of the twisted waveguide. It is shown that in calculating the twisted waveguide strength and stiffness, it is necessary to apply minimum values for integral characteristics of the cross section regardless of the load direction.
Synthesis of self-reconfigurable manufacturing systems in engineering
Authors: Gurjanov A V , Shukalov A V , Zakoldaev D A , Zharinov I O
Published: May 2020

The scientific problem of the synthesis of reconfigurable manufacturing systems is considered. Reconfigurable manufacturing systems are an integral part of self-reconfigurable factories in engineering. Self-reconfigurable plants operate on the basis of flexible and advanced lines equipped with RMS. A scheme is proposed for decomposing the requirements of the technical specifications for the design of self- reconfigurable plants in order to determine the particular requirements for individual components of the plant’s infrastructure. An algorithm for designing a different class of reconfigurable manufacturing systems is proposed.
Automation of control of electric generators from renewable energy sources in hybrid power supply systems
Authors: Kolnichenko Georgij I , Tarlakov Yakov V
Published: May 2020

The article notes that due to the increasing number of electricity generating equipment based on renewable energy sources and consumers of electricity received from them, it becomes necessary to combine generating sources, consumers and control units into autonomous electric power systems. Due to the uneven generation and consumption of renewable energy sources under the influence of external conditions (wind, solar radiation, etc.), renewable energy sources should be reserved by means of traditional energy in the so-called hybrid mode, when traditional alternators must work together with renewable energy sources. In this case, the task of creating a tracking inverter that converts direct current (DC) to alternating current (AC) according to the characteristics of the AC generator arises. At Bauman Moscow State Technical University the experimental samples of a DC-to-AC inverter with its own logic and microcontroller have been developed and created. They control the conversion mode either by the signals of the reference AC network, or by the signal of the microcontroller. The proposed devices are designed to fully automate power generation processes and power consumption processes in hybrid power supply systems and are designed to manage input and output generating capacities and power consumers to ensure maximum efficiency of power generation from renewable energy sources.
Analysis of diesel engine indicator diagrams when working on methanol with DST
Authors: Devetyarov R R , Chuvashev A N
Published: May 2020

The significant cost of diesel fuel, limited reserves of oil and natural gas have made the work aimed at finding and justifying the use of alternative fuels relevant. Alternative fuels include methanol, which can be obtained not only from natural gas and coal, but also from bi-omass or urban waste. Methanol can be attributed to renewable energy sources. It should be noted that the development of a fundamentally new engine model that meets modern environmental and economic requirements requires long-term research and high material costs, so our research is aimed at upgrading commercially available engines. The article presents the results of implementing a method for using methanol by feeding it directly into the combustion chamber and igniting it from the igniting part of diesel fuel. The indicator indicators of the developed diesel engine when working on methanol at different angles of injection of diesel fuel and methanol are analyzed. Optimal installation angles of fuel injection are selected and justified.
Investigation of the impact behavior for composite materials reinforced by glass fibers
Authors: Karnoub Amer , Huang Hajian , Antypas I R
Published: May 2020

In this present work, a non-straight Shear-lag model has been created to anticipate the pressure centralization of a customary hexagonal cell containing a two-bundled fiber. This work is concretized by the advancement of a hypothetical plan of the micromechanical redistribution of the anxieties produced by the transverse burst along the strands in a unidirectional composite as an element of the number and the air of the messed up and flawless filaments. The scientific improvements utilized are introduced to legitimize the state of the conveyance of the worries around the messed up fiber and the adjoining filaments. The limit and coherence conditions are considered by this model to evaluate the exchange pace of the strands, imperatives through the lattice between the fiber broken and the neighboring filaments unblemished.
Wide-angle antenna systems with mechanoelectrical beam steering
Authors: Litinskaya Ye A , Stankovsky A V , Polenga S V , Salomatov Yu P
Published: May 2020

This article presents an overview of scanning antenna systems’ models, which were developed on basis of the laboratory “Antennas and microwave devices” of Siberian federal university. An antenna array with beam steering by mechanical dielectric lenses rotating and an antenna array with beam steering by mechanical subarrays rotating are introduced. Calculation and measurement results of the antennas are shown.
Typology of innovation strategies for petrochemical enterprises
Authors: Barsegyan N V , Salimyanova I G , Kushaeva E R
Published: May 2020

The article defines the role of the petrochemical industry in the development of the economy as a whole. The key problems of innovative development of the Russian petrochemical complex that are typical for the current stage are identified. The purpose of the study is to analyze the organizational and economic processes of formation and implementation of innovative strategies for the development of petrochemical enterprises and practical recommendations for improving their performance. To achieve this goal, the role of the components of the innovative potential of enterprises in the development of the economy is determined; the analysis of directions of development of innovative activity of the main foreign players in the market of petrochemical is carried out; strategies of innovative development of petrochemical enterprises are formed. It is concluded that in the era of digitalization of industry, the priority strategy for the development of the petrochemical complex is resource conservation.
Modeling of dimension chains of pressure control devices
Authors: Mikhailov P G , Chuvykin B V , Mikhailov A P , Fadeev E D , Sokolov A V
Published: May 2020

The article is devoted to pressing issues in the field of instrumentation and measuring equipment: the correct assignment of tolerances and landings in the manufacture and assembly of parts and assemblies of measuring transducers of physical quantities. In the process of developing converters, an obligatory design procedure is the construction of mathematical models of dimensional chains, which are analytical and numerical equations consisting of geometric dimensions shown in the drawings. Moreover, these models include both nominal geometric and angular dimensions, and the tolerances adopted on them. Using the minimum-maximum methods, it is quite simple to calculate the dimensional chains for simple parts and assemblies. Complex parts and assemblies having a large number of sizes included in the dimensional chains are calculated by statistical methods using specialized programs.
Analysis of the possibility of modernization of the state district power station by building the combined cycle plant
Authors: Balzamov D S , Yu Balzamova E , Bronskaya V V , Ignashina T V , Kharitonova O S
Published: May 2020

A priority task for the development of the energy industry is the replacement of the spent estimated lifetime of the generating equipment by new capacities taking into account progressive technologies. Nowadays, combined cycle technology shows itself to good advantage and provides excellent efficiency for any competing gas turbine systems that are likely to be available for large-scale electricity and heat production. In this article the possibility of modernization of the SDPS by building the combined cycle plant is considered.
Investigation of local maxima of the modified modular correlation function
Authors: Malinichev D M , Melnikova E A , Prus Y V
Published: May 2020

Recently, due to the development of communication systems for various purposes, there is a need to use indirect methods for calculating the correlation function. There are several algorithms for calculating indirect correlation functions, one of which is modular. The article examines the properties of local maxima of correlation functions of various types.
Quality estimation of the technology process controlling system of making the glass rods
Authors: Alekseeva L B
Published: May 2020

The article considers the transition process of controlling the drawing of glass rods (Light guide). To solve that problem the static and dynamic features of the object have been considered. The process of drawing the light guide is being made by adjusting the speed of the output link of the drawing machine. The paper considers the driven glass movement in the light guide formation zone and determines the transition process pattern, in a system: “Controlling machine – formation zone”. The time of the transition process is being estimated.
Application of additive technologies for manufacturing turbine stator parts in aircraft engines
Authors: Balyakin A V , Vdovin R A , Ispravnikova S S
Published: May 2020

Continuous development of additive technologies and fast prototyping methods makes it possible to use them in manufacturing of complex shape models to a high precision. The traditional technological manufacture process of critical hot gas path parts by investment casting is expensive and time consuming in view of its technological complexity. It is related to the wax casting process which provides complex profiles with high geometrical accuracy. The acceleration of the investment casting process should increase the productivity of the manufacturing process of such hot gas path parts as the turbine stator, however, it is not allowed to decrease the geometric accuracy of the finished product. The aim of this work is to compare technological processes for manufacturing turbine stator parts at various temperatures using the fast prototyping method (wax casting in silicone molds). The dimensional analysis of the stator castings showed that casting in silicone molds provides the required geometric accuracy. Thus, silicone molds can be viewed as a good cost-effective solution for small-scale or pilot production of high-precision complex parts in gas turbine engines. This article describes the procedure for the integrated application of additive technologies and thermographic analysis to accelerate the investment casting process by determining the optimal temperature conditions and cooling period. Ultimately, it reduces the duration of the production cycle and the cost of the finished product while retaining the quality characteristics.