bluuebunny/crossref_metadata_2025_split huggingface dataset:
The influence of the location of the cells on the allocation of weed impurities for cleaning raw cotton from fine waste
Authors: Rajavov O I , Kurbonov F A , Gappavora M A , Jumaev Sh 
Published: May 2020

Abstract
The article considers the influence of the movement of raw cotton in the cleaning zone with various options for the location of the grid holes. The article also provides a theoretical study of the movement of cotton on the surface of the grid. The location of the grid holes for cotton movement is recommended. The ratios of the reaction forces at impact are presented, as well as the method for calculating the angle of flight particle of cotton before hitting a multifaceted grid surface.
Method of thermal treatment of saw disk teeth of fiber-processing machines by laser quenching
Authors: Abrorov Akbar , Kuvoncheva Matluba , Rajabov Ozod , Mukhammadov Mukhsin , Jumaev Shakhrillo 
Published: May 2020

Abstract
The article covers the increase of hardness of the surface layer (h=25 microns) with a soft core (h=100-300 microns) of the teeth of the saw blades of the cylinders of fiber processing machines. Assigned task of hardening the surface layer of the teeth of the disc saw of the cylinder of fiber-processing machines is solved by thermal and chemical-thermal treatment of the teeth of the disc saw in a vacuum chamber by pulsed electron beams, laser processing after ion nitriding.
Study of performance criteria of experimental tumbling bodies
Authors: Lyukshin V S , Shatko D B , Strelnikov P A 
Published: May 2020

Abstract
Tumbling is a surface plastic deformation of loose workpieces due to their collision with a working tool in an enclosed volume when they are moved due to the rotation of the working body. Special tumbling bodies are used as a working tool for the implementation of this operation. Tumbling process performance criteria depend on many factors. Along with the type of tumbling, the adopted cutting conditions and the equipment used, the design and dimensions of tumbling bodies, as well as the materials from which these bodies are made, have a significant impact on the final result of polishing the workpieces. New designs of tumbling bodies are created with the aim of increasing the process performance, as well as improving the surface quality of workpieces. The issues related to the development and study of performance criteria of experimental tumbling bodies are reflected in the article.
Development of a flange connection model to study the effect of uneven bolt tightening forces on the stress-strain state
Authors: Tukaeva R B , Bayazitov M I , Enikeeva A A 
Published: May 2020

Abstract
It is shown that during the operation of technological equipment and pipelines very often there is an uneven tightening (UT) of fasteners for flange connections (FC), which can lead to an emergency. On the model of flange connection developed in the computer-aided design system “KOMPAS-3D”, the influence of UT on the stress-strain state of FC elements from the point of view of ensuring their strength was studied. The adequacy of the model was proved by comparing the stresses calculated in the PASSAT software package in accordance with GOST 34233.4-2017 with the stresses obtained by modeling the flange and bolt with a uniform tightening force. A methodology has been developed to create an uneven tightening force (TF) on the FC model. The calculation results showed that when the bolt load per bolt increases even by a factor of 1.25, the circumferential and meridional membrane stresses in the FC increase, respectively, by 2.5 and 3.3 times, which can cause FC depressurization or impair its strength. It is necessary to continue research with other parameters of loading and structural design of the FC in order to determine the most dangerous combinations and recommend continuous monitoring of TF during operation.
Loading of satellite bearing of planetary cycloid gear by forces acting in meshing
Authors: Tchufistov E A , Tchufistov O E 
Published: May 2020

Abstract
The main feature of planetary cycloid gears is the multi-pair contact of the pin-rollers and teeth of the cycloidal disk. To establish liaisons in the gear, mathematical models of the satellite’s force interaction with pin-rollers are used. The dependences of the total forces in meshing, which occur under the action of a torque applied to the output shaft, from the gear parameters, clearances in gear and the relative position of gear elements are given. The results of calculations performed in Mathcad using the proposed model show how the forces change in the direction of the inter-axis line of gear with increasing clearances at a constant torque on the output shaft. This solution allows estimating the forces acting on the satellite bearings at the specified manufacturing accuracy at the design stage of the gear.
Factor analysis in the lame problem (the problem of composite cylinders)
Authors: Kremyansky Vladislav F , Klasner Georgy G , Yaroslavtsev Daniel I 
Published: May 2020

Abstract
The article considers one of the important directions in the repair of cars. The examples discussed relate to the case where the holding force must ensure that the additional element is stationary in the axial direction. This is the case, for example, when restoring cylinder liners, when there are no forces and moments that tend to rotate the additional element in the enclosing part. The probabilistic formulation of the composite cylinder problem described above is also fully applicable to the calculation of these compounds.
The use of the planetary differential in the mechanisms of energy recovery
Authors: Barbashov N N , Abdullina L R , Ilyushkov I N , Bolotov I E 
Published: May 2020

Abstract
The paper assesses the possibility of using planetary differential variators to change the gear ratio of the kinematic control chain of a flywheel accumulator. The possibility of using a differential mechanism as a variator for the flywheel battery drive is related to the calculation of the required power for the transmission ratio control. The equation of the power in the engagement of central wheels with the satellite was derived as a ratio of the power ratio. The obtained ratios of speeds and capacities of the differential mechanism allowed us to prove that the flywheel accumulator can be used without being included in the control system, by using the property of self-leveling the kinetic energy of the links of the planetary differential variator.
The path planning method for anthropomorphic manipulator for avoidance an obstacle approximated by a parallelepiped
Authors: Petrenko V I , Tebueva F B , Antonov V O , Gurchinsky M M , Zavolokina U V 
Published: May 2020

Abstract
There are various methods of planning paths for anthropomorphic manipulators that allow to bypass the obstacle and to work in real time. One of these methods was developed by the authors for circumventing an obstacle, which was approximated by a sphere. The approximation by a sphere of elongated obstacles overstates their size that leads to an excessive length of the path of avoiding the obstacle. The developed method combines analytical and numerical solutions with relatively low computational complexity, allowing it to work in real time. The effectiveness of the method is illustrated by a numerical example. The trajectory of the anthropomorphic manipulator required for its movement can be obtained using the existing methods of generating a trajectory based on the path of movement calculated using the proposed method. The developed method can be implemented in the systems of intellectual or supervisory control by anthropomorphic manipulators.
Digital solution to the problem of flow control in mechanical engineering production
Authors: Prozhogina T V , Provotorov V V , Borisoglebskaya L N , Zaslavskiy A A 
Published: May 2020

Abstract
Industrial Internet of Things is widely used to solve the industrial automation problem. This concept is aimed at the interaction of controlling computers and industrial equipment. The main problem is considered the development of algorithms for this interaction. Host computers have programs, based on these algorithms. M2M sensors are used as a feedback system to make management decisions during the operation. A condition for the successful implementation of IIoT is the standardization of machine-readable codes and unified data exchange protocols. The criteria for the development of algorithms is the economic efficiency. Optimal algorithms of the digital interaction in subdivision of mechanical engineering production are proposed in this article.
Low pass anti-alias filter for ADC with differential input on base Op-Amp with differential output with a minimum number of capacitors
Authors: Denisenko D Yu , Prokopenko N N , Butyrlagin N V 
Published: May 2020

Abstract
The new circuit of third order low-pass filter (LPF) on operational amplifier (Op-Amp) with differential output designed to limit the spectrum of signals at the input of an analog-to-digital converter (ADC) is presented. The developed circuit contains one capacitor less than in classical LPF. The basic equations of the new circuit are presented and the results of computer simulation obtained in Micro-Cap CAD, which based on models of THS4130 Op-Amp by Texas Instruments, are shown. The results of computer simulation confirm the efficiency of this LPF scheme and show a close to ideal correspondence between the theoretical and real amplitude-frequency response.
Simulation of partial oxidation of natural gas in a resource-saving reactor mixer
Authors: Bazhin V Yu , Trushnikov V E , Suslov A P 
Published: May 2020

Abstract
Modern industrial methods of producing hydrogen almost exclusively use fossil fuels, like natural gas, crude oil or coal, as raw materials. Methods such as steam reforming or partial steam oxidation to produce hydrogen from fossil hydrocarbons. This process chemically separates the carbon which is then converted to carbon monoxide (CO). These methods of hydrogen extraction are not ideal to actively protect the climate. There is currently a certain shortage of hydrogen in any refinery, so an additional source of hydrogen needed to stabilize the process. The work presents the results of simulating the processes in the homogeneous zone of the mixer and simulating the process of converting methane in the catalyst bed of the mine reactor using natural gas to produce hydrogen.
Review of modern software complexes and digital twin concept for forecasting emergency situations in oil and gas industry
Authors: Abdrakhmanova K N , Fedosov A V , Idrisova K R , Abdrakhmanov N Kh , Valeeva R R 
Published: May 2020

Abstract
Technological processes complication leads to increase of accidents scale, this negatively affects people, environment and enterprise. In this regard, there is a need for good risk management, taking into account real state of a hazardous production facility. In this paperwork, is analyzed application of hazard analysis method “Tree of consequences”. The method is widely used for industrial safety of oil and gas facilities. The paper also provides an overview of some software systems that allow to visualize steps of risks analysis and to minimize calculation process based on 3D modeling. In oil and gas industry the FLACS software tool is used to simulate most well-known ignition and toxic emission scenarios in terrestrial conditions. It is possible to assess effect of hazardous or harmful substances on production facility in domestic TOXI-Risk software package. Phast Lite program is used to simulate consequences of accidents with ability to create danger in entire sequence of events from accident itself to damage. In addition, the article defines digital twin concept. The digital twin provides constant interaction and data exchange with a real object. This technology is promising for production management, for maintenance and for accidents prevention.
The digital twin technology and its role in manufacturing
Authors: Magomadov V S 
Published: May 2020

Abstract
One of the most notable technologies of the fourth industrial revolution (also referred to as Industry 4.0) is considered to be a technology known as a “digital twin”. This technology is particularly useful in the context of manufacturing and the main focus of this paper is the use of this technology in this area. In this paper, it is explained what a digital twin is and a couple of different definitions are covered. Then, this technology is compared to some other emerging technologies of Industry 4.0 and the main differences and similarities are discussed. Finally, the business value of the digital twin is discussed.
Research of efficiency of influence of ultrasonic treatment on asphalt and paraffin oil deposits
Authors: Palaev A G , Dzhemilev E R 
Published: May 2020

Abstract
In the oil and gas industry, asphalt and paraffin oil deposits generated in process equipment, tanks and pipelines are a major problem. Their accumulation in the flow section and tanks leads to a sharp decrease in the level of productivity of the entire system. Currently, many methods are used to delete asphalt-resin and paraffin oil deposits. These methods are mainly based on thermochemical methods, the use of which involves high costs and an increase in the level of danger of the works carried out. This paper discusses the ultrasonic effect on asphalt and paraffin oil deposits in order to melt them and, as a result, better removal. This method is sufficiently effective, safe, simple and environmentally friendly to be used in manufacturing processes.
Visualization of metalworking processes in the development of simulation programs for equipment with numerical control
Authors: Yurov A N , Chizhov M I , Bredikhin A V , Lavlinskiy V V 
Published: May 2020

Abstract
The article proposes the concept and implementation of soft-ware solutions that allow to present milling and turning processes. The software simulates metal-looping using a pre-created control program in G-code. Software products based on the use of functional capabilities of the open Cascade geometric core allow not only to visualize the processes of milling and machining, but also to transfer models with the results of processing through export formats to other CAD systems.
Fault-tolerant nondestructive control of the stress-strain state of the load-bearing elements of pantograph lifts
Authors: Kalinichenko V S , Vlasov Yu A 
Published: May 2020

Abstract
This paper proposes a method of fault-tolerant nondestructive control of the stress-strain state of the load-bearing elements of lift and transportation machines, considered on the example of a prototype of pantograph-type lifts. The basic requirements for the load-bearing elements of lift and transportation machines are analyzed. An experimental research technique has been developed including tensometric and thermal nondestructive testing methods. A full-scale experiment of a prototype pantograph-type lifts is shown.
Assignment of dimensional accuracy parameters of parts during assembly of aircraft repair engines
Authors: Grachev I A , Bolotov M A , Kudashov E V , Pechenin V A 
Published: May 2020

Abstract
The article considers the existing models and methods of analysis and synthesis of geometric tolerances of products with assembly dimensional chains. There proposed a method to define the rational tolerances for the linear dimensions of parts during assembly of aircraft repair engines. The developed methodology is based on the use of computer simulation technology for assembling the assemblies with actual geometry, and a model for calculating the labor input and cost of parts manufacturing based on the assigned tolerances. The main advantages of the technique are considered by the example of assigning rational tolerances to the parts of the repair rotor of a high-pressure compressor, which have the greatest influence on the functional characteristics of the aircraft engine. The results of the relationship between the dimensional accuracy parameters of parts and assembly parameters are presented, and the dependence of the cost of refinement or manufacturing of the part on the assigned tolerance is obtained.
Empirical modeling of cutting force from technological factors in hard turning of 105WCr6 steel
Authors: Rastorguev D A , Sevastyanov A A 
Published: May 2020

Abstract
The article is devoted to the mechanical load determination on process constants during hard turning of 105WCr6 instrumental steel. The work contains the results of three-factor laboratory experiment on end face turning. The blanks were rings, hardened to a hardness of 55 HRC. Their outer diameter was about 50 mm. During the experiment, the basic process parameters, namely cutting modes, were varied. Semiproducts were turned on a Russian CNC lathe modification 16B16T1C1. The system includes integrated diagnostic subsystem with encoders and current sensors. These sensors allowed using indirect method for mechanical loads assessment. To mathematically explain the force level statistical methods are used. They were linear regression for exponential formula and decision trees. The results of the mathematical investigation and the future review of the studied correlations are given. The results are compared with previously developed machine learning models.
Low temperature and radiation resistant JFET differential amplifiers circuits synthesis with increased common-mode rejection ratio
Authors: Prokopenko N N , Pakhomov I V , Zhuk A A 
Published: May 2020

Abstract
We have had limits for transfer ratios of adder ∑1, when there are increased values of common-mode rejection ratio, for general function circuit of classic two stage JFET of differential amplifiers, including input differential stage and adder ∑1 output currents differential stage. We have considered three particular variants to synthesize differential amplifiers practical circuits based on current mirrors, folded cascodes and floating complementary differential stage. We have shown that differential amplifiers of floating complementary differential stage subclass is the most advanced to construct low noise analog circuits to process signals of sensors, operating in severe operating conditions (at low temperatures, initial radiation). Proposed circuit solutions are recommended for silicon and GaAs JFET technologies (including JFet, CJFet, CBiCJFet).
Hydrostatic supports in test and measuring equipment
Authors: Strok L V , Sekatsky V S , Merzlikina N V , Pikalov Yu A , Kaposhko I A 
Published: May 2020

Abstract
The relevance and advantages of hydrostatic supports in test and measuring equipment are shown. Structural and operational features are given when using hydrostatic supports as hydrostatic guides in vibration bars, vibration systems and measuring devices, ensuring minimum friction and smooth movement. The use of spherical hydrostatic bearings in ball joints allowing to create high-frequency pulse systems is shown. Examples of application of hydrostatic bearings in actuators, drives and spindle assemblies of test and measuring equipment are given.
Development of a mathematical model and analysis of the receiver for emergency alerts in a mine
Authors: Kudinov D S , Maikov O A , Kokhonkova E A , Potylitsyn V S 
Published: May 2020

Abstract
The article presents the scientific and methodological approaches to the principles of construction and justification of the characteristics of a new sample of the SDV radio channel in underground mines to assess the required sensitivity of the receiving equipment and the maximum range of the channel. Based on the estimates obtained, as well as using radio engineering methods for calculating communication systems, the principles of noise reduction are formulated, coding and modulation systems are selected and justified. Mathematical modeling of noise reduction processes was carried out and algorithms and programs for the receiving and transmitting paths of a wireless data transmission system through rocks were developed. The paper presents the results of field observations of noise recorded in a working mine for the extraction of non-ferrous metals.
Engineering and manufacturing methodology of multi-robots collaboration model synthesis
Authors: Gurjanov A V , Shukalov A V , Zakoldaev D A , Zharinov I O 
Published: May 2020

Abstract
The theoretical problem of the synthesis methodology for the collaboration of multi-robot facilities is investigated. The analysis is presented and the basic hardware and software of multi-robot facilities are determined. Multi-robotic industry can be implemented within the intelligent mechatronic systems (IRS). A methodology has been developed and procedures for technical collaboration of the intelligent robotic components of the multi-robotic industry have been defined. The emerging technologies of collaboration between IRS are determined. The analysis is presented and the results are determined for each intelligent robotic component of the engineering and manufacturing mechatronic facilities. The function and specialization of each IRS resources for the implementation of the multi-robotic reliable facilities is determined.
Study of the impact of the life cycle of aircraft engines on the strategy of an engineering enterprise
Authors: Tikhonov Alexey 
Published: May 2020

Abstract
The article explores the relationship between the life cycles of aircraft engines / engineering plants / aircraft engine industry with various strategies based on organic and material approaches. The analysis of the characteristics of the life cycle stages of aircraft engines that affect the performance of an innovation - active enterprise (a part of the United Engine Corporation (UEC)) is presented. The basic toolkit has been studied, which allows to competently and reasonably form the relationship of the life cycles of an aircraft engine / enterprise / of UEC with strategies to ensure the stable functioning of the organization.
Methods of decomposition of Boolean functions
Authors: Gdanskiy N I , Denisov A A , Rysin M L 
Published: May 2020

Abstract
The article considers on of the main types of Boolean functions conversion – their decomposition. The decomposition is being used in many applications for studying and designing complex objects and systems with logical methods. Firstly, the article observes decomposition of Boolean functions represented in the truth table. Among traditional decomposition approaches, the article describes formulas presented by Boole and Shannon and special methods of orthonormal expansions. Then, the paper considers contemporary decomposition techniques and their classification. Next, the article discusses representation of Boolean functions in normal forms and essential features of that representation, important for decomposition. After that, the article reviews decomposition techniques for boolean functions represented in conjunctive normal forms (CNF). The study mentions CNF partitioning as hypergraph partitioning. Then the paper discusses applications generating large CNFs. Minimization of large CNFs with traditional methods is impossible. Their minimization is possible only using decomposition techniques. The separate class of tasks is minimization of Horn formulas. Finally, at the conclusion, the study discusses decomposition for parallelization of SAT problem.