bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation of rift element forming by magnetic-pulse deformation
Authors: Kurlaev N V , Ahmed Soliman M E
Published: September 2020

One of the most common operations of magnetic pulse sheet stamping is the formation of a rift and stiffeners, which are widely used in aircraft manufacturing. Reducing labor intensity while maintaining the required quality parameters of the obtained parts is one of the most relevant issues of sheet stamping. The solution to this problem should provide, with given tolerances on the geometric dimensions of the part, the requirements for the surface condition, strength and performance characteristics of the product. A necessary condition for the implementation of this goal is the absence of signs of technological defects, in particular, the formation of waves, corrugations, ligaments in the areas of the part on compressed and compressed-stretched sections of the workpieces. In this paper, to study the stress-strain state of a rift workpiece in forming – drawing processes using control elements, the finite element method was used. An example of numerical simulation of the electromagnetic forming of a rift with the obtained mesh shape of a workpiece without a corrugation defect or metal shrinkage is given.
The study of the force parameters of complex loading during thermal-force processing
Authors: Semenov K O , Rastorguev D A
Published: September 2020

The article considers one of the methods for reducing and stabilization residual technological stresses in low-rigid parts which relates to the field of thermo-force processing with simultaneous straightening of the workpiece. The study’s results of the force modeling taking into account the influence of temperature during thermo-force processing of stainless steel samples are presented. The torsion moment as an additional force load in combination with the tensile force is used. Dependencies and results of research are presented for the stress state using the combined action of torsion moment and axial force at different temperatures taking into account relaxation processing. Recommendations are given for improving existing and developing new devices and technologies in the field of thermal-force processing of low-rigid shaft-type parts.
Simulation of expansion a branch-pipe with «blinds» by the pressure of magnetic field
Authors: Kurlaev N V , Ryngach N A , Tagoev F M , Ahmed Soliman M E
Published: September 2020

Thin-walled tubular structures that are used to connect units and supply gas or liquid are widely used in aircraft devices. Aircraft pipelines have a complex cross-sectional profile, large differences in size, the presence of different holes, shape changes, stiffeners, etc. Often, such parts have insufficient indicators of durability during the process of maintenance. The main reason is the use of traditional technological processes in the production of such parts. This paper presents an analysis of electrodynamic processes during magnetic - pulse «expansion» of thin-walled tubular parts. To carry out the technological process, separation operations plus calibration, a branch-pipe was chosen, which serves to mix the flows of hot and cold air in the aircraft air conditioning system. A prerequisite for the achievement of this goal is high demands on the quality of the internal and external surfaces, shape retention, minimal thinning of the walls.
Industry 4.0 - new challenges for production
Authors: Alekseev A M , Borisov A I
Published: September 2020

The article presents the results of the analysis of features of formation of new economy on the basis of the concept Industry 4.0. The research of problems of transition to a new development level, increase of innovative activity rates, increase of flexibility and adaptability of business systems cause high interest of scientific community of different countries of the world. Growing digitalization dictates new conditions for the economy functioning and development. Within this context the paper considers the issues of defining the essence of digital economy, its specific features, basic technologies of Industry 4.0. The main processes to be transformed to implement the concept at enterprises are determined, and competitive advantages, achieved in the digital economy as a whole, are highlighted. The main challenges have been investigated and specific gaps that need to be overcome in order to develop the digital economy in Russia have been formulated. Therefore, the research topic is relevant in modern conditions of development of the global economy.
A study of strength fluctuations of Portland cement by FTIR spectroscopy
Authors: Tararushkin E V , Shchelokova T N , Kudryavtseva V D
Published: September 2020

The study of daily tests (1-28 days) for compressive strength of ordinary Portland cement is presented. The daily strength curves were obtained for two water cement ratio (W/C=0.4 and W/C=0.5). On both curves, intervals with strength fluctuations were identified. For cement paste with W/C=0.4, one interval with fluctuations was detected (13th-18th days), for cement paste W/C=0.5, two intervals with fluctuations were detected (13th-17th days and 21st-25th days). The largest value of decrease in average strength for samples with W/C=0.4 is -7.1 MPa, for samples with W/C=0.5 the largest value of decrease in average strength is -2.7 MPa. For cement paste samples with W/C=0.4 for 15th-18th days, infrared spectra were obtained by Fourier-transform infrared spectroscopy. The analysis of the FTIR spectra showed that the strength fluctuation may be caused by the formation of a sulfate phase (ettringite) during hardening of the cement paste.
Improvement of abrasive machining performance in mining machinery manufacturing based on the use of innovative structures of tumbling bodies
Authors: Shatko D B , Lyukshin V S , Strelnikov P A
Published: September 2020

At present, the domestic engineering industry as a whole and mining machinery manufacturing in particular undergo a difficult period due to the imposition of sanctions and the ensuing crisis economic phenomena. In the absence of an acceptable rate of import substitution caused by the low competitiveness of manufactured products, mechanical engineering enterprises are forced to look for ways to ensure the production of modern mining equipment that meets the requirements of consumers. This is especially important in light of growing trends of the transition from raw materials export to the industry-oriented line of development of the domestic economy. In the face of a decrease in the share of mechanical engineering in the gross product of the Kemerovo region by several times in recent years, it is imperative to increase the competitiveness of mechanical engineering enterprises. For the successful achievement of this objective, it is important to update the existing manufacturing facilities, including through the introduction of new advanced technologies. Based on this, an important and urgent task aimed at improving the rate of domestic production is the search, substantiation and implementation of innovative competitive technologies in mining machinery manufacturing. One of the promising areas in this field is to increase the efficiency of abrasive machining of mining equipment parts during tumbling operations.
Steam coal engineering solutions
Authors: Terentyev S E , Zakharenko I K , Shcherbachenko P S , Gibadullin A A , Morkovkin D E
Published: September 2020

As part of the study, the volumes of coal production and use in the industrial and domestic sectors were analyzed. The analysis showed that in Russia the volume of coal production is increasing, which is associated with the prevailing technologies for the use of coal in industrial production and the impossibility of their restructuring and transformation for new types of fuel. At the same time, the study revealed that there is a decrease in the share of coal generation, but at the same time, coal-fired thermal power plants emit about 13% of carbon dioxide in Russia. In the work, an engineering solution was proposed in the field of coal generation, which should provide an increase in the efficiency of coal use in the manufacturing and domestic sectors. At the end of the study, the necessary conclusions were drawn on the results of the work done.
Plasma electrolytic treatment of Ti6Al4V alloy in electrolytes with boron-containing compounds
Authors: Kusmanov S A , Tambovskiy I V , Kusmanova I A , Belkin P N
Published: September 2020

Tests of aqueous solutions were carried out in order to verify their suitability for boriding and borocarburizing of titanium alloy. The state of the modified layer was examined using an electron microscope. The regimens effect on the layer properties hardness and roughness was clarified. The electrolyte compositions used provided the hardening of zone with a thickness of 0.2 mm and a maximum microhardness of up to 965 HV after boriding and layer of 0.35 μm with 880 HV after borocarburizing. The layers were established to demonstrate the best properties at the processing temperatures from 900 °C to 1000 °C for 5 min. A regime has been determined that provides a diminishment of roughness Ra from 1.01 μm to 0.55 μm.
Analysis of crack formation of an Al-Mg-Li (1420) system alloy under the influence of thermal energies
Authors: Agafonova D V , Mikheev V A
Published: September 2020

Cracks of all types are extremely dangerous for structures; this fact is critically unacceptable in the rocket and space industry. Aluminum-lithium alloys have a perfect set of mechanical, operational and corrosion characteristics that allow them to compete with traditional alloys and even polymer composite materials. The main focus of scientific research was the analysis of crack formation when combining two successive methods of heating samples of the promising rocket and space industry alloy 1420: discrete isothermal scanning and continuous program heating. The relationship between such factors as the average elongation of cracks in the sample, the number of cracks in the sample, changes in the area of the sample relative to the degree of compression of the material, the heating temperature of the sample, the exposure time in the furnace, the number of rolling passes, and rolling speed were revealed in the paper.
CVD diamond structures for fast neutron detection
Authors: Polushin N , Laptev A , Chernykh S , Didenko S
Published: September 2020

The first test results of synthetic diamond grown by CVD for a fast neutron detector are reported. The detector has size - 5 × 5 mm. The Pt contacts formed to both substrate sides were 4×4 mm. The detector was irradiated by 14 MeV neutrons from a D-T generator. The obtained registration efficiency was 0.63 · 10−2 pulses/neutron.
Tribological properties of a plain bearing with a sleeve made of a nanostructured zirconia crystal
Authors: Alisin V V , Borik M A , Kulebyakin A V , Lomonova E E
Published: September 2020

The article deals with the issues of the working capacity of a plain bearing with a sleeve made of nanostructured partially stabilized zirconium dioxide. The tribological properties of the shaft-sleeve interface under boundary friction conditions are investigated. An X-ray phase analysis of samples of zirconium dioxide crystals with various additives of yttrium oxide stabilizer has been performed. The optimal composition for the manufacture of bearing bushings has been selected. A procedure for tribological testing of a sliding bearing has been developed. Special attention is paid to the influence of the clearance between the shaft and the bushing on the tribotechnical characteristics of the interface. The calculation of the wear rate of the sliding bearing is carried out taking into account the clearance. A method for calculating the service life of a bearing is proposed. The prospect of using nanostructured crystals of zirconium dioxide for the manufacture of sleeve bearing bushings for precision mechanisms and devices has been experimentally confirmed
Lubricants to reduce wear of wheels and rails high-speed rail transport
Authors: Alisin V , Pokidko B , Roshchin M , Simakova G
Published: September 2020

The article is devoted to the study of colloidal lubricant to reduce wear of the friction surfaces of wheels and rails high-speed rail transport. The disadvantage of almost all known lubricants for rails lubrication manufactured according to conventional techniques, which include the content of base oils crushed to a fine state particles, are problems associated with sedimentation of the particles and the clogging of filters. Discussed in the article, the lubricant is free from these disadvantages. The results of tribological bench tests of various lubricants for rails in the velocity interval of 40-100 m/s on a “bridge analogy”. Proposed recommendations for use of the developed lubricant for lubrication rails.
Stability evaluation of cutting edges during operation of composite materials for instrumental purposes based on a metal matrix
Authors: Fedotov A A , Safonova M N , Syromiatnikova A S
Published: September 2020

The development of new, highly informative methodological tools for diagnosing the characteristics and assessing the quality of diamond powders and powders of other superhard materials based on modern technical means of obtaining initial data is an important and relevant scientific and applied task. The direct practical use of diamond powders is preceded by a procedure for establishing the values of their operational properties and characteristics. The results of assessing the stability of the cutting edges of abrasive composite materials are equally important for both powder producers and their consumers. The productiveness of grinding tools is largely dependent on the degree of use of the cutting properties of the grains. Premature loss of grains from the bundle leads to increased wear, and sometimes to a complete loss of tool performance.
Wireless Holter monitoring system with a dual-core processor
Authors: Ivel V P , Gerasimova Y V , Moldakhmetov S S , Petrov P A , Gerasimov I A
Published: September 2020

The article discusses the principles of building a wireless automated system for heart activity Holter monitoring using a WiFi module based on a dual-core processor. The system is focused on use in a medical cardiology center or at home. The article proposes the method of wireless transmission of an electro-cardio signal based on the paralleling of processing operations and Wi-Fi transmission of an electro-cardio signal. The paper presents algorithms for wavelet compression and filtering of the transmitted electro-cardio signal that ensure high reliability of the transmitted ECG information. A semi-realistic model of the Holter monitoring system has been developed, including real-time packages of the Matlab system, a PhysioBank ATM electro-cardio signal database, a hardware interface based on the PCI-1710HG Board and an external wireless ECG information transmission subsystem. The proposed methods and algorithms will provide high-quality and multi-day wireless transmission of ECG signals, characterized by low power consumption
The main factors, influencing the processes in the microwave field
Authors: Daminev R R
Published: September 2020

An important condition for effective application of microwave radiation as an energy carrier for carrying out technological processes is absorbing capacity of technological media of electromagnetic radiation of microwave range. The dissipation of the electromagnetic field in a substance depends on its composition and properties. The effect of electromagnetic radiation on the process medium when creating conditions of volumetric heating of the substance can provide a high rate of temperature growth. Volume heating is possible when microwave radiation penetrates the substance. Electromagnetic radiation is absorbed to varying degrees by semiconductors and dielectrics. The absorbed amount of microwave energy depends also on the aggregate state of the substance, its density. More microwave radiation is absorbed in solids and liquids than in gases. The more electromagnetic energy is transferred to the internal energy of the medium, the higher the heating efficiency in the microwave field.
Interaction of Sn-Cu-Co powder materials with diamond in liquid-phase sintering
Authors: Sokolov E G , Ozolin A V , Gaponenko S A , Arefieva S A
Published: September 2020

The interaction of the Sn-Cu-Co powder material with diamond in liquid-phase sintering has been studied. The material contained commercially pure metal powders at the following proportion, wt. %: 21 Sn, 46 Cu, 33 Co. Metal powders and synthetic diamonds AS150 were mixed with the organic binder and applied on a steel base. Sintering was performed in vacuum at 820–1100°C. The structure of sintered materials is investigated by X-ray diffractometry, scanning electron microscopy and energy dispersive X-ray microanalysis. It has been found out that at sintering temperatures of over 900°C, the liquid phase wets and dissolves diamonds due to its containing cobalt. When the material is cooled down after sintering, the dissolved carbon crystallizes on the surface of diamonds in the form of graphite flakes, which leads to the formation of a weak layer between diamonds and the metallic matrix.
Specific surface defects arising from diamond CVD-synthesis from methane-hydrogen plasma
Authors: Martynova T V , Polushin N I , Laptev A I , Zakharova E S , Maslov A L
Published: September 2020

Diamond is unique material that have long been known to humanity. It has extra high hardness, thermal conductivity, as well as unique electrophysical characteristics that can be managed by changing its impurity composition. Therefore, this material has gained the potential of widespread use in engineering, which is currently complicated by the high cost of diamonds, difficulties of its synthesis, mechanical and physical processing. A promising direction for obtaining high-quality poly- and single crystals and, accordingly, expanding the areas of diamond use is the method of its deposition from the gas phase (CVD). The main problem that researchers face during deposition the diamond is the formation of surface defects in the growth zone. In this work, we discuss defects observed on single-crystal diamond CVD-films of 300-500 μm thick obtained from methane-hydrogen plasma with 3% methane. The surface was studied by scanning electron microscopy. As a result of the work, we revealed that during the diamond films CVD-growth mainly three types of defects are formed: etch pits, isolated diamond particles (“straying” diamonds) and coarse-grained diamond formed along the diamond plates periphery. Methods for eliminating these defects are proposed.
Accumulated reliability of information hardware and software systems
Authors: Titov E K , Tsvetkov V Ya
Published: September 2020

The paper’s purpose is to study the accumulated reliability of information hardware and software systems. The difference between hardware and software systems and information hardware and software systems is shown. A feature of information hardware and software systems is the software components presence. The software components allow for the possibility of eliminating errors during operation. This creates a condition for increasing the information hardware and software systems’ reliability during operation. The removable and non-removable errors concept of software components is introduced. The initial failure rate and limiting failure rate concept is introduced. Based on the analysis, the accumulated reliability concept is introduced, which is higher than the information and software systems initial reliability.
Study of the identification model of tribological interaction of friction couples
Authors: Ismailov G M , Tyurin A E , Gavrilin A N , Nevinitsyna V S , Lomovskaya S A
Published: September 2020

In this paper identification of dynamic systems under conditions of unlubricated friction is analyzed and problems related to the dynamics of materials frictional interaction are considered. Algorithms of automatic control and catastrophe theory were used to study frictional properties of materials. The authors developed a special device to study tribotechnical characteristics of materials. A mathematical algorithm for studying the tribological contact in the form of a tribological system based on the input-output models is presented. The scope of application, requirements for input and output data, use of the algorithm in case of contact surface evolution are determined. The results obtained indicate the nonlinear friction behavior for friction couples PTFE-Copper, PTFE-Steel and PTFE-Titanium. The relationship between the stability of the system and changes occurring in the tribocontact was found. Processing of obtained dynamic characteristics of tribological interaction of friction couples shows periods of material wear and energy consumption for the formation of a new surface in terms of time
High-resolution lightweight dual-frequency aircraft synthesized aperture radar for remote-sensing of the Earth: implementation experience and development prospects
Authors: Rovkin M E , Samuleev M S , Malyutin N D , Ermakov R V , Djakov I V , Dostovalov M Yu
Published: September 2020

A prototype of a dual-frequency aviation synthetic aperture radar station for remote sensing of the Earth, suitable for use on light-engine and unmanned aerial vehicles, is described. The system’s concept, main technical solutions, and results achieved in the creation of onboard equipment are considered. The results of flight tests of the SAR prototype carried out in 2019 are presented. The characteristics of the radar survey are described. Possible ways of further development of the system are discussed.
Corrosion chemical mechanism in aggressive liquid of MAO coatings based on OT-4 titanium alloys
Authors: Mironova V A , Chizhevskaya M V , Girn A V , Ravodina D V , Mikheev A E , Khodenkova E V
Published: September 2020

Microarc oxidation of alloys is widely used to obtain multifunctional coatings with unique properties. One of the topical issues in the application of the microarc oxidation is to increase the corrosion resistance of titanium alloys. In this article, the corrosion resistance of various microarc oxidation coatings of a titanium alloy in chemically aggressive liquids is determined. Comparative analysis of microarc oxidation coatings chemical resistance of the titanium alloy OT-4 showed a high coating resistance to the corrosive liquid exposure. The highest corrosion coefficient was determined when the alloy was exposed to concentrated sulphuric and hydrochloric acids. Virtually no corrosion of microarc oxidation coatings was observed in dilute acids (H2SO4 and HCl) and NaOH alkali solution.
Technological aspects of the use of fire-prevention roller shutters in places of permanent residence and temporary stay of people
Authors: Yakovlev V A , Semenova A N
Published: September 2020

This article provides brief statistics on victims of fires in the Russian Federation in preschool educational institutions, medical and medical organizations. It provides a general description of fire-prevention roller shutters, the need for their use in buildings and structures, in accordance with technical regulations, functional fire hazard F1 and F4. The general information and materials used for the manufacture of roller shutters are indicated, the probable places of their installation are suggested - on the internal inter-office and interior windows and doors, on the doors at the entrance and exit from the building, as well as at the gates at the entrance to the garages built into the building. A probabilistic method of using fire-prevention roller shutters on the basis of a preschool educational institution as a result of which hypothetically predicts a decrease in the number of victims during a fire is presented.
Prospective helicopter crash-resistance fuel systems testing
Authors: Grachev S V , Smagin D I , Savelev R S , Napreenko K S
Published: September 2020

This article discusses the main requirements for testing helicopter fuel systems in accordance with the regulatory documentation. The analysis of existing solutions for testing aircraft fuel systems both in Russia and abroad was carried out. The concept of a test complex designed for testing fuel systems of helicopters is presented, which includes rotary platforms designed to simulate different angular positions of test objects, technological equipment, and a set of mathematical modeling tools. This test facility allows for joint full-scale and digital tests of the fuel system at all stages of the helicopter’s life cycle.
Automatic control of structural parts main parameters during mechanical testing of aircraft
Authors: Simonov V L , Yu Eliseeva D , Mnatsakanyan O L , Karyagina T V
Published: September 2020

In the aviation industry over the past few years, much work has been done to improve the conditions for the design, manufacture of aircraft, as well as their operation. New models of Russian aircraft are not inferior, and sometimes surpass foreign analogues in a number of parameters. At the same time, flight safety requirements are growing. The introduction of digital innovation is dictated by the growing requirements for technological innovation in the aviation industry. The world is on the verge of a new, fourth industrial revolution, Industry 4.0, whose large-scale penetration will lead to the complete automation of most production processes. Domestic production of various types of aircrafts for civilian and military purposes should reach a new level of technological development in order to protect its role in global economic competition. In this regard, the volume of research, design and development, installation and commissioning, testing and service-maintenance work is significantly increasing. It is possible to achieve an increase in the quality of flight performance and the level of flight safety of an aircraft by creating an automatic system for monitoring the main parameters of structural parts during mechanical tests of aircraft. This article is devoted to the study of automation of control of parameters of structural parts during mechanical tests of aircraft, the process of development and testing of an automated complex for vibration testing of parameters of structural parts of aircraft is considered.
Etermination of factors affecting the stability of cutting edge of thin lamellate knives
Authors: Barakaev N R , Urinov N F , Saidova M Kh , Sohibov I A
Published: September 2020

The article covers technological reliability of thin lamellate knives in terms of accuracy in size and shape of cut blank, identifies the main reasons for the deviation of the cutting edge from the cutting plane, the block diagram of lateral deviation of lamellate knife and experimental setup are developed.
Determination of the energy efficiency of drying hawthorn fruit in a drum dryer with a paddle mixing device
Authors: Shcherbakov S Yu , Babushkin V A , Krivolapov I P , Lazin P S , Korotkov A A
Published: September 2020

A drum dryer with a paddle mixing device which can significantly increase productivity and improve the quality of the drying process has been developed. The recommended values of the following parameters, which provide the most energy-saving mode while maintaining the high quality of the finished product (air supply speed is 2.5 m/s; drum filling factor is 0.25; the stirrer rotation speed is 20 rpm, the drying temperature is 60°C) have been established. These parameter values correspond to the specific power consumption equal to 1.83 kW* h/kg of evaporated moisture.
Results of research on determining the coefficient of rolling resistance of the wheel by the rollback method
Authors: Novikov K V
Published: September 2020

The simultaneous rolling process of two identical wheels in the driving and braking modes is simulated, taking into account the rollback process. The processes of interaction of the driving and braking wheels of the same size with each other and with the mobile platform (road) separating them are studied. The circular diagrams of the wheel rotation angle of a tractor of the traction class 1.4 obtained with the help of a radial recorder are presented in the driving mode when trying to start from a place under a traction load and in the driven mode when stopping after rolling on different support surfaces. As a result of field experiments, it was found that at low values of the relative rise (descent), the transition of the wheel from rolling to rest is not only accompanied by a rollback to the angleαr, but also by damping fluctuations relative to the position of the future rest.
Model and calculation development of productivity of cotton harvesters
Authors: Rizaev A A , Yuldashev A T , Kuldoshev D A
Published: September 2020

This article provides a calculation of the performance of cotton harvesters. The previously proposed models of cotton-harvesting machines are described, as well as new developed models are offered. Based on a numerical study, a comparative analysis of MX-1.8 vertically spindle cotton harvesters and Keys 2022 horizontally spindle cotton harvesters is provided. The influence of the parameters of the cotton harvesters on their productivity is determined.
Status and prospects of technical equipment of small enterprises in agricultural production
Authors: Dzuganov B B , Shekikhachev Y A , Teshev A Sh , Chechenov M M , Mishkhozhev V H
Published: September 2020

This article is devoted to the state of production of crop products and the problems of technical support of peasant (farmer) households and individual entrepreneurs of the Kabardino-Balkarian Republic. Based on the results of the All-Russian Agricultural Census of 2006 and 2016, using a comparative research method, an analysis of such indicators as: dynamics of cultivated areas, volumes and structure of production; the yield of the main types of agricultural crops in general for the agro-industrial complex of the region and categories of farms; the state and assessment of the development of technical equipment of peasant (farmer) households and individual entrepreneurs (the availability of agricultural machinery and the state of the machine and tractor fleet, the actual equipment supply). The place of this category of agricultural producers in the agricultural production of the region has been determined. It is proved that technical equipment has a significant impact on the efficiency of agricultural production of peasant (farmer) households and individual entrepreneurs. The study made it possible to identify the factors influencing the efficiency of agricultural production, to formulate conclusions and proposals for the formation on this basis of effective mechanized structures with the required production and economic parameters. The research results can be used in the implementation of the concept of creating a multi-level system of production and technological support of mechanized processes in crop production, optimization of the distribution of work between the performers: agricultural producers and structures of production and technological services.
Cyberphisical adaptive manufacturing control systems
Authors: Chertovskoy V D , Tsehanovsky V V
Published: September 2020

Cyberphysical systems of adaptive manufacturing control are considered. It has been shown that the concept of Cyberphysical systems can be used for both the construction and analysis of adaptive systems. A generalized technology of research is proposed. A generalized model has been formed both for manufacturing in general and for structured manufacturing with a universal structure. All possible perturbations in the system and their compensating controls are considered. It is noted that the prior art publications use simpler system structures. It has been shown that the proposed model can be used in the study of newly studied systems with different structures, including those not previously discussed. Initially, we consider the technology of building a model that allows you to ensure the optimal mode and the prompt transition to the production of new products. Emphasis is placed on obtaining numerical data. A specific technology for using the model for control purposes is then proposed.
Universal MHD device for automation of casting control of aluminum
Authors: Kinev E S , Tyapin A A , Golovenko E A , Avdulov A A , Efimov S N
Published: September 2020

The article proposes an MHD device designed to automate the management of casting aluminum melt from a stationary mixer. The product is made on a modular basis, similar to an induction detachable unit, has three magnetic cores with windings. The design of the MHD device, the location of the magnetic cores, and the features of connecting the windings to the network turn it into a universal unit. The location of the casting trough inside the closed cores allows the device to be used as an MHD pump for aluminum melt. Methods of connecting the windings make it possible to realize the function of dosing the melt using automated process control systems. Pumping the melt through the chute when placing the module between two sockets ensures stirring of the melt in the mixer. The use of a group of single-phase transformers in three-phase switching ensures the movement of aluminum in the channel by creating traction forces in the melt. The presence of windings, allowing for opposition, puts the electromagnetic module into transformer-inductor mode, improving energy efficiency in traction modes, providing melt heating beyond the furnace and maintaining aluminum temperature.
Study of profilograph features for determining the geometric characteristics of products by laser scanning
Authors: Vasilyev S A , Fedorova A A , Vasiliev M A
Published: September 2020

The work is devoted to study of profilograph features for determining geometric characteristics of products by laser scanning. The control methods applied are implemented in science-based designs of technical means of control that can provide high accuracy of parameter measurement when profiling the surface of parts. The analysis of graphs of the metal sheet surface in full and Cartesian coordinates made it possible to determine the highest and lowest points of the surface, therefore to determine the profile of sheet undulation. For example, the height of metal sheet irregularities resulted from some deformations was 6,378 mm.
Russian projects in tractor engineering intended for increasing the efficiency of agricultural production
Authors: Marinchenko T E
Published: September 2020

Technical and technological upgrading of agricultural production is a necessary factor in maintaining the competitiveness of an agricultural producer. According to experts, the lag in technological development as compared to the level of developed countries is a generation in production process, and from two to three generations in machinery for most agricultural producers. To ensure a decent position of the Russian Federation on the global food market, it is necessary to close this gap in the shortest possible time. Therefore, the timely introduction of the latest scientific and technical projects in production is currently an unconditional basis for its further development. Technical and technological upgrading has a direct impact on the efficiency of agricultural production and the sustainability of agriculture in general. The experience of these agricultural producers who have upgraded their own production shows that agriculture is becoming a high-tech and highly efficient industry. The upgrading of agricultural machinery is a continuous process of introducing innovations into individual components and systems that increase the power, functionality and efficiency of the machinery as a whole. The article analyzes a number of projects of domestic machine builders that are competitive with respect to foreign models.
Influence of the natural gas composition and flue gas recirculation in a reverberatory furnace for nickel alloys
Authors: Quiroz Cabascango V E , Bazhin V Yu
Published: September 2020

A reverberatory furnace for nickel refining is an open flame furnace that comes from a burner, which uses natural gas as fuel; and which working temperatures vary from 1450°C to 1550°C. In reverberatory furnaces there is a waste of heat generated by the burners. If we in time use an adequate recirculation of the combustion gases from the flame we could increase the fraction of heat transferred to the molten metal, in our case, nickel alloys. In this work, we developed a CDF modeling for this type of furnaces to optimize the dynamics of the exhaust gases, to contribute to a more efficient smelting process, focusing on the fact that the efficiency depends on the composition of natural gas. In our study we used 3 different compositions of natural gas, focusing on the percentages of methane with 95.89% Russian natural gas, with 89.67% Spanish and with 89% Bolivian natural gas. This modeling allows us to work with fluid dynamics, combustion and heat transfer, using the Finite Volume Method. Radiation is a very important process to take into account and is adapted to calculate heat transfer. The modeling has been using the ANSYS CFD 19R3 program. The results show the influence of the composition of natural gas on heat transfer in reverberatory furnaces fed with natural gas.
Selecting the shape of centroids of round and non-round gears
Authors: Kurasov Dmitry
Published: September 2020

In the design of gears, the most important task is to obtain centroids. Features of selection of centroids of round and non-round gears obtained by means of functions of harmonious form are considered, process of its formation is shown. Analytical dependencies are presented describing the geometry of the centroid of a round and non-round gearwheel. An example of an implementation of a mechanism based on dependencies describing the construction of a centroid is given.
Stabilization of the axisymmetric parts dimensions and shapes
Authors: Bobrowskii A V , Drachev O I , Ugarova L A
Published: September 2020

This article reviews the method of increasing the stability of geometrics of non-rigid parts of the “shaft” type. The authors give the grounds for the necessity of treatment by the complex vibro-impact method. The authors also present the unit functional diagram, complete with the automatic control system for the implementation of the proposed method. The unit consists of a self-centering steady rest with a non-flow electrohydraulic drive; a vibro-impact drive with a waveguide converter, a workpiece temperature control device. The control system provides the workpiece axis stabilization and temperature control in the process of axial complex vibro-impacts. The article proves the expediency of using the complex vibro-impact method.
Monitoring of parameters of functional and cost analysis of personnel processes of the enterprise quality management system
Authors: Fedonin O N , Simkin A Z , Mozhaeva T P , Proskurin A S
Published: September 2020

The paper considers the fundamentals of personnel processes in the quality management system (QMS) of an enterprise based on the methodology of functional cost analysis (FCA). The expediency of integrating and applying FCA technology into personnel processes of the enterprise’s QMS is justified. The tools (their potential and limitations) are analyzed that allow to identify “areas of imbalance”, i.e. the excess of costs for functions over their significance in the structure of the process as a whole. A way to identify the range of FCA indicators that show othe need for corrective actions is proposed. The arguments are given which prove the advisability to use the proposed monitoring of FCA parameters in relation to the personnel processes of the enterprise’s QMS.
Sharing model of industrial factories
Authors: Shukalov A V , Zharinov I O , Zharinov O O
Published: September 2020

Perspective approaches how to organize a production led to creation of new economic-industrial models (EIM) to describe business processes of companies interaction. The sharing model is actual to be implemented under knowledge economy conditions, which is an approach to manufacture an item by renting for money principles. When a small innovation company pays for a cyber-physical production (CPP) resources renting. Company resources renting may significantly reduce project companies expenses and provide some customization (orientation for a consumer) of the item being manufactured properties. There is an EIM to describe business processes for a big factory, within which some factory makes an apparent projection of a customized item and rents factory CPP resources to produce an item. It is clear that the sharing EIM key component is an online cloud solution, which supports electronic contract servicing within the system of the digital companies electronic commerce.
Assessment of the competitiveness of agricultural production enterprises
Authors: Toshboyev A J , Mardiyev N M. , Ziyadullayev I N , Azimov R B , Zakimov A M
Published: September 2020

The clash of interests of producers of products, works and services in the struggle for profit is a natural process in a competitive environment. Competition as a fundamental characteristic of the market economy has a significant impact on the economic activity of the enterprise, forcing it to strive for superiority over its competitors. In modern economic conditions in Uzbekistan, competition is increasing. As a result, business leaders are constantly searching for new tools for managing enterprises, organizations, factors and levers to increase their competitiveness. The most correct choice of the company’s assortment policy serves as a kind of guarantee that profitable opportunities will not be missed. In this regard, the problem of effective management of the product assortment of manufacturing enterprises is always relevant. The article considers a list of issues that affect the essence and importance of assortment management in a production enterprise, suggests measures to improve the management of the product assortment and assesses their effectiveness. The purpose of this article is to develop measures to improve the management of the product assortment on the example of an agricultural enterprise. The object of research is JSC “Aggregate plant”. The main activity of the plant is the production of agricultural machinery, components and parts for agricultural machinery and oil pumps.
Gradient method for determining non-informative features on the basis of a homogeneous criterion with a positive degree
Authors: Samijonov A , Mamatov N , Niyozmatova N A , Yuldoshev Yu , Asraev M
Published: September 2020

The choice of informative features is one of the main tasks in the problem of pattern recognition and the effectiveness of its solution in many respects depends on the criterion of information content used. Some methods for choosing informative features are implemented by eliminating non-informative features from the feature space. A single criterion has not been developed to select a set of non-informative features. Therefore, the criterion is selected from the formulation of a practical problem. Currently, several methods have been developed for selecting features that are focused on the use of a specific information content criterion. To date, more than 50 homogeneous criteria with zero order have been developed, but in many practical tasks the task of choosing non-informative features requires the use of homogeneous criteria with a positive degree. The paper proposes a gradient method and an algorithm for determining non-informative features based on a homogeneous criterion with a positive degree.
Satellite radio channels simulation methodology
Authors: Samoylov A G , Nasir S A X
Published: September 2020

The main contribution of this paper is to develop the modeling of satellite radio channels. The approach based on the results of propagation of radio channels with different antenna elevation angles. Also, is to obtain the mathematical model of a multipath radio cannel in several frequency bands. Creation a novel mathematical model of multipath radio channels will contribute the global simulator of satellite radio channel. With a software reset of a control signals, this package will allow the researcher to simulate the propagation of a radio signal for different environmental and geographical conditions of critical communication systems.
Method for selecting informative and non-informative features
Authors: Niyozmatova N A , Mamatov N , Samijonov A , Rahmonov E , Juraev Sh
Published: September 2020

Today, solving the problems of choosing informative and non-informative features is an urgent problem, since the areas of application of methods and algorithms for pattern recognition to solve modern applied problems are expanding. But when solving these problems, problems arise that interfere with the effective use of well-known methods for choosing informative and non-informative features. The choice of a combination of a method and a criterion is one of these problems that is most suitable for the task, that is, with the search for such a pair of methods and criteria in which computational costs and recognition error are minimized. This article proposes a new method for choosing informative and non-informative features.
Training of quartering in digital control of overhaul
Authors: Tsyganov V V
Published: September 2020

In the face of change it is necessary models both adaptation and organization activating a human factor. Model of stochastic bifurcation with Tutor’s determines 2 alternative assessments of a stochastic situation in organization. For stochastic quartering in two-level organization, integration of 2 stochastic bifurcation models is proposed with the aid of system engineering. But, with insufficient awareness of the organization’s management, undesirable activity of a controlled agent is possible. Namely, the agent can choose its state in such a way as to maximize own objective function. For this reason, the agent may not use its capabilities in the interests of the organization. To solve this problem in the face of uncertainty, a mechanism of digital control of two-level organization including stochastic quartering with a tutor is proposed. Sufficient conditions have been found for the synthesis of such mechanism, in which the agent fully uses his capability. The use of such mechanism is illustrated by the example of supervising of a depot making overhaul of railway locomotives.
Method for assessing the economic sustainability of a high-tech corporation
Authors: Nesterov E A , Tuylin A E , Boginskiy A I , Chursin A A
Published: September 2020

In the article the method for assessing the economic sustainability of a high-tech corporation has been developed. It is based on using dynamic systems to assess the effect of uncertainties on the sustainable development of a corporation during the implementation of unique projects. The integrated indicator of the economic sustainability of the high-tech corporation is based on the system of economic indicators related to the operation of the high-tech corporation and the information about the uncertainties of the external and internal economic environment. The suggested method includes a system of indicators that assess the corporation sustainability at a certain moment, and the tools that make it possible to use this system of indicators during the whole period of the corporation’s operation, taking into account the effect of multidirectional uncertainties that differ by the effect degree, in order to determine scenarios for the development of the corporation depending on the degree of effect caused by uncertainty factors on its functioning, and to assess the efficiency of the assumed management decisions on resisting these factors.