bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of the pneumatic actuator of traction machines sand feeding system when the sand-air mixture flows out
Authors: Konovalov P Y , Bulavin Y P , Volkov I V , Yaitskov I A 
Published: December 2020

Abstract
In the course of the study, a computational experiment is carried out using ANSYS Fluent software package for three-dimensional models of the outflow of air-sand mixture from the outlet pipe of the locomotive sand feeding system to determine the effect of the shape of the outlet cross-section on the transportation of quartz sand particles at various outlet flow velocities.
Kinematic parameters of the device for cleaning the excavator bucket
Authors: Zenkov S A , Lkhanag D 
Published: December 2020

Abstract
This article discusses the use of a mechanical method of combating soil adhesion to an excavator bucket. Experience in the operation of earthmoving machines shows that when developing wet soils (especially at freezing temperatures), freezing and sticking of soil to working bodies significantly reduces machine performance. The analysis of devices designed for mechanical cleaning of the excavator bucket was carried out, the most effective equipment design was also selected hydraulic excavator, eliminating the disadvantages of other models. According to the technical task, the working body in Compass-3D was designed, angles, speed of movement of the hydraulic cylinder relative to the handle of the excavator and the force on the cutting edge of the bucket were calculated.
Phasechronometric performance data processing for lathe operation parameters monitoring
Authors: Boldasov D D , Komshin A S , Potapov K G , Syritskii A B 
Published: December 2020

Abstract
The article describes the problems of processing measuring phase-chronometric information in order to obtain information about the turning process. Similar techniques are used to monitor the current state of the cutting tool, optimize cutting conditions and control the correct operation of the machine. Also, a methodology for determining the parameters of the machine using the Pearson correlation coefficient.
Operation of process equipment with crack-like defects
Authors: Valeev S I , Kharlamov I E 
Published: December 2020

Abstract
Analysis of the ‘layer separation’ defect of the base metal depending on the depth of its occurrence on the further safe operation of process equipment is carried out. The calculation is performed by the finite element method using ANSYS software package. The obtained results enable one to conclude that the layer separation does not have a significant effect on the bearing capacity of the equipment, while it is local and not being distributed.
Non-traditional approaches to the problems of forming the structure of the vibration field of technological machines
Authors: Eliseev A V , Kuznetsov N K , Eliseev S V , Vuong Q T 
Published: December 2020

Abstract
A technology for evaluating the dynamic properties of mechanical vibration systems within the framework of structural and mathematical modeling methods with the use of dynamic characteristics of the structure of vibration fields of technological machines has been developed. We consider the problem of developing a mathematical model that allows us to correct the dynamic state depending on the system parameters based on local estimates of the properties of the vibration field. The ratio of reactions is used to evaluate the dynamic state of the vibration field. The coupling coefficient of external harmonic perturbations and the mass-inertia characteristic of a device for converting motion are considered as parameters of a mechanical oscillatory system. Based on a model with two degrees of freedom and two external influences, a detailed method for constructing mathematical models for evaluating local features of the vibration fields of technological machines is proposed. The obtained analytical expressions allow us to construct diagrams of the characteristics of mechanical oscillating systems depending on the parameters of the adjustment tools.
The formation of errors caused by temperature processes in mechanisms built on the principles of parallel kinematics
Authors: Brovkina Yu I , Sobolev A N , Nekrasov A Ya 
Published: December 2020

Abstract
The article discusses issues related to the process of formation of the total error affecting the position error of the output link of mechanisms with a parallel structure caused by thermal deformations of the leading links. Movable rod mechanisms allow you to create lightweight technological machines for complex technological operations: finishing turbine blades, the production of art products, complex configurations, as well as medical devices and navigation equipment. The causes causing a change in the temperature state of the mechanisms under consideration are considered. A technique for determining the position of the output coordinate as a result of deviation from a given trajectory is presented.
Selection of displacement coefficients in external and internal involute gearing of planetary rotor hydraulic machine
Authors: Kurasov Dmitry 
Published: December 2020

Abstract
Hydraulic and pneumatic volume displacement machines are commonly the most important and integral elements of modern mechanical systems. One of the known types of such machines is planetary rotary hydraulic machines (PRHM) with floating satellites in contact with central gearwheels. The numbers of the central gearwheels «waves» M and N may be different or the same. The article considers the case of the same number of «waves» when the central wheels are round. The algorithm of selection of the range of permissible values of the PRMM displacement coefficients, in which the central wheels of internal and external gearing have the same number of teeth, is proposed. Equal number of teeth is proposed to be obtained by application of maximum values of positive displacement of tool in processing of central gearwheel with internal gearing. The calculation was carried out according to formulas according to GOST 16532-70 and GOST 19274-73, which are based on the module “Shafts and mechanical transmissions” of the Kompas 3D software complex.
About form of elastic flexible tube
Authors: Shinkin V N 
Published: December 2020

Abstract
The approximate solution of the equation of elastic flexible rod by means of a power series is given below. For this solution, the coefficients of the series are found up to the 12th degree of the series argument. As an example of the use of the found approximate solution, the numerical calculation of the shape and inclination angle of the subwater part of TurkStream at its laying on the sea-bottom are given.
To question about moment at elasticoplastic bending
Authors: Shinkin V N 
Published: December 2020

Abstract
Sheet metal is one of the main forms used in the metal-working, it can be cut or bent into various shapes. Bending of sheet metal on the vertical presses is the most common technological operation in metallurgy and mechanical engineering at the production of various products. Below the mathematical model of elastic-plastic deformation at bending of sheet metal on the vertical presses is proposed.
Compression of a porous cylindrical body
Authors: Fedyaev V L , Faskhutdinov M Kh , Sidorov I N 
Published: December 2020

Abstract
Unsteady compression by a flat stamp of a porous cylindrical body located on a rigid support is considered. It is assumed that slippage occurs on the contact surface of the cylinder end face with the stamp (the friction forces are small), and on the opposite, the friction forces are significant. The compressed body is conventionally divided into two parts: the upper cylindrical and lower conical. In each of these parts, in accordance with the principles of the theory of plasticity, a stress-strain state is evaluated, and, under certain assumptions, the shape and characteristic dimensions of the compressed body are found.
Method of optimization synthesis of parameters of actuating system of anthropomorphic gripper with adaptive control
Authors: Zhdanova Yu I , Moshkin V V 
Published: December 2020

Abstract
Gripper is a basic component of any robot. Its functionality is determined by realized number of degrees of freedom and control system. Anthropomorphic robots (AR) possess the biggest number of mobilities. Usage of group drive with adaptive control of mobile links is developing way of AR construction. This method allows to grasp and hold arbitrary shape objects when the motors number is less than mobilities number. Method of parametric synthesis of actuating system (AS) of AG made by two subsystems: the main kinematic chain (MKC) and motion transmission system (MTS) is represented in the article. MKC including two output links connected with each other and gripper base by rotational pairs with parallel axes is considered. MTS is parallel leverage mechanism. Subsystems are connected with each other by additional functional connection. The connection provides moving torque in MKC kinematic pairs. The presented approach is based on choosing MTS parameters that provide producing maximum torque in MKC kinematic pairs of its links end positions. The obtained equations of connection reflect the specificity of AS construction. The optimality criterion is defined and formalized by revealed equations of connection. The presented method allows to choose MTS parameters providing rational functioning of anthropomorphic gripper AS.
The engine-recoverer of secondary energy thermal sources based on a Curie point effect for magnetic materials
Authors: Papin V V , Bezuglov R V , Dyakonov E M , Shaforost D A 
Published: December 2020

Abstract
The article discusses one of the most important issues of the fuel and energy complex - the energy efficiency and the most complete use of the flue gases heat. A review of existing technologies for the heat utilization, including some designs of magneto-thermal engines, is carried out, their structural and technical characteristics are considered. A technology is proposed that ensures not only the utilization of exhaust gases from power plants, but also the application in the field of waste management, for example, increasing the energy efficiency of waste incineration technologies. The idea is to use the Curie point effect when designing a recovery engine that utilizes the waste heat of secondary energy sources. The applied potential of using the effect is based on the possibility of utilizing the heat of various secondary energy sources, such as exhaust gases of heat engines, up to low potential sources, since today there are materials that carry out a second-order phase transition already at 20 °C.
Cycloidal reducer with rotation external ring gear
Authors: Kormin T G , Tsumbu J-D B 
Published: December 2020

Abstract
Process of modelling cycloidal reducer with rotation external ring gear is presented in this article. Due to industrial interest in such devices, the prototype cycloidal reducer with rotation external ring gear for the stepping motor Nema 23 is shown. The program for creation of a wave profile of the planet for CAD packets became result.
Control and optimization of technological processes for forming nanoscale films for sensitive sensor elements
Authors: Mikhailov P G , Ualiyev Zh , Kabdoldina A , Sokolov A V 
Published: December 2020

Abstract
Modern metal film sensors are used in products and systems of rocket, space and aviation equipment, in extreme operating conditions. In order for the sensors to function correctly in such conditions, they must have a high temporary stability over the entire life of operation and storage. In addition, metal film sensors are often operated at elevated temperatures and under the influence of large-scale vibration and shock. Therefore, they must have high mechanical static and dynamic strength. Increased requirements for the reliability, accuracy and strength of metal film sensors force designers and technologists to develop new design and technological solutions that ensure the regular operation of sensors in products and systems of rocket, space and flight equipment.
Application of multi-agent approach to development of the petrol dispatching system of gas stations network
Authors: Aksyonov Konstantin , Ayvazyan Hambardzum , Aksyonova Olga 
Published: December 2020

Abstract
This work is devoted to questions of analysis, planning and modeling of logistics processes and delivery for oil products supply networks of gas stations. The task of organizing the petroleum product supply process is a complex task of great dimension, which actually comes down to long-term and short-term transportation planning, as well as the operational management of vehicles and the solution of situational management and dispatch tasks. The report discusses the solution of the problem of oil and gas supply to a network of gas stations using a hybrid approach (multi-agent and simulation), as well as its software implementation in the form of a complex decision-making and simulation BPsim. This approach was applied to the “Bashneft” network of petrol stations in the Sverdlovsk Region.
Mathematical support of walking robots-tetrapods movement algorithms
Authors: Grekov E L , Shelikhov E S 
Published: December 2020

Abstract
This work presents a mathematical model that describes the movement of robots with four limbs (tetrapods). The relevance of the publication is justified by the popularity and increased demand for robotic devices used in production and everyday life. The main advantage of these machines is the ability to move over rough terrain, so are often used to perform transport and loading operations. The authors considered the most common movement scheme, taking into account the features of the kinematic scheme of this type devices. Tasks of transforming the coordinates of legs contact points of the supporting surface are formulated and solved to form tasks for controlling servo drives. The resulting mathematical expressions are universal for the considered robots and allow their statically stable movement in all directions and turning through a given angle. The obtained results can be used in development of algorithms of control programs for different microprocessor systems, in design of kinematics of these devices, in selection of optimal electromechanical equipment, as well as in creation of similar mathematical models for other types of walking robots. The materials of the article can be useful for engineers and scientists in the field of robotics and automation.
A plant with a rotary jet grinder to produce small fractions of mineral raw material
Authors: Bardovsky A D , Valeeva L M , Basyrov I I 
Published: December 2020

Abstract
This paper presents the results of studying a set of equipment including a centrifugal mill and a separator. It presents data on the plant’s design and operation, defines a rational shape of the working surface of the mill’s accelerating discs providing highly effective collision of particles moving in oncoming flows. As a result of theoretical studies, we established that the generatrix of such a surface should have the form of a logarithmic curve. Experimental studies have shown that the best quality of the plant operation is achieved with certain combinations of parameters, such as rotor speed, the distance between the ends of rotating rotors, and the air flow rate.
Multimodal transport network freight routing algorithms in optimization models
Authors: Lebedeva O A , Poltavskaya J O 
Published: December 2020

Abstract
The development of international trade is associated with global growth in trade. For the implementation of trade between different regions, multimodal transportation is used. The cost of international logistics reaches approximately 30-50% of the total cost of production, therefore, reducing transportation costs is one of the options to increase profits and maintain competitiveness in the world market. Thus, the optimization of freight routes for moving goods through a multimodal transport network is relevant. This study discusses the problems of planning multimodal transport routes from the point of view of developing models and algorithms: characteristics of optimization models; selection of optimization models; solving optimization models with heuristic algorithms.
Prediction of residual life of complex electromechanical systems based on small training samples
Authors: Lekomtsev P V 
Published: December 2020

Abstract
A model for predicting the residual life of complex electromechanical systems based on small training samples is presented. The developed algorithm involves the use of a probabilistic model of a complex electromechanical system. The statistical characteristics of the model parameters are determined by training samples, that is, by past experience of the functioning of this or similar system. The developed algorithm is based on recognition and forecasting algorithms based on a Wald’s sequential decision-making procedure, a modified V. S. Pugachev canonical decomposition, and an improved Parzen window density estimation algorithm.
Improvement of the workers labour rationing and motivation methodology for the manufacturing shop
Authors: Matalasov S Y , Kuznetsova E Y , Podoliak O O 
Published: December 2020

Abstract
The hypothesis considered in the work is that it is possible to normalize all works carried out at the production site and to use these norms to build a successful system of remuneration and motivation of personnel. To prove this hypothesis, the most complex and responsible in margin terms load section of the production plant was chosen. The work analyzed the causes of downtime and their impact on the productivity of workers and on the level of remuneration. The method of determining the worker’s earnings depending on the unit of indicators and parameters is proposed.
Assessment of the effect of humidity of air-cooled in the absorption refrigeration machine on the operation of an energy gas turbine
Authors: Mendeleev D I , Marin G E , Galitskii Yu Ya , Savina M V 
Published: December 2020

Abstract
Due to the fact that the construction of combined cycle plants has become the main trend in the development of the world heat power industry in the last two decades studies of the operating modes and operation of such equipment are very relevant at the moment. The aim of this work is to study the effect of chilled air in an absorption refrigeration machine on the operation of a stationary gas turbine installation. The operation of a gas turbine installation is affected by the temperature of the surrounding air due to changes in its density and humidity at different temperatures and because of the different useful work of the gas turbine. The standard adopted in the design of gas turbines is 15 °C. An increase in ambient temperature leads to a decrease in the generated power of the gas turbine. The influence of gas turbine power from ambient air can be reduced by means of cooling units for incoming air (absorption refrigeration machine (ARM)), or by modernizing the gas flow part of gas turbines and injecting water or carbon dioxide. This study is devoted to the influence of humidity of air entering the gas turbine compressor from the ARM, where it was previously cooled. It was noted that air humidity affects the efficiency of the ARM and therefore the useful power of gas turbines. The power of a gas turbine can be increased to 7-9 MW when using the ARM.
Gradients in rails at long-term operation
Authors: Yuriev Anton , Kormyshev Vasiliy , Glezer Alexander , Gromov Victor , Ivanov Yurii , Semin Alexander 
Published: December 2020

Abstract
Long-term operation of rails is accompanied by the formation of the gradient structural constituents consisting in the regular change in relative content of lamellar pearlite, fractured pearlite and structure of ferrite-carbide mixture in cross-selection of rail head. As the distance to the surface of railsincreases the relative content of metal volume with the structure of lamellar pearlite decreases and that with the structure of fractured pearlite and ferrite-carbide mixture increases. The ferrite-carbide mixture structure has a nanodimentional range of grains, subgrains and particles of the carbide phase forming it.
The theoretical substantiation of the roller diameter of a versatile tillage implement
Authors: Zykin Evgeny , Lazutkina Svetlana 
Published: December 2020

Abstract
The paper is devoted to a soil compacting implement. To improve the quality of soil cultivation before sowing, a versatile tillage tool has been designed which consists of a frame, loosening and leveling rollers, and rods with springs. The versatility of the implement lies in the fact that it can be used in combination with disc harrows, cultivators, grain seeders and units for the main moldboard or non-moldboard tillage. Theoretical studies have demonstrated that when the hollow cylinder of the roller interacts with a clod of soil, two normal forces N
1 and N
2 arise. The resulting force N = N
1 + N
2 tends to push the soil clod out of the clearance area between the hollow cylinder and the surface of the field in the direction of the positive part of the Ox axis. The friction force F
2 arises between the surfaces of the soil clod and the soil and the force F
1 between the surface of the hollow cylinder and the soil. The resulting frictional force F = F
1 + F
2 is directed opposite the movement direction (rotation) of the leveling roller. Preliminary theoretical calculations showed that the minimum diameter of the hollow cylinder should be at least 0.35 m, and the height of the annular compacting components and pointed rippers should not exceed 6 cm. Then the total outer diameter of the leveling roller will be 0.47 m. It was proven in the course of theoretical studies that the minimum diameter of the hollow cylinder of the leveling roller depends on the quantity hcm of the soil compaction, the maximum size of soil clods left after the pass of the loosening roller, and the physical and mechanical properties of the soil.
A device for harvesting and utilization of non-grain part of crop and fertilization
Authors: Borisova Svetlana M , Papusha Sergey K , Papusha Vladimir K 
Published: December 2020

Abstract
An effective method of harvesting grain crops using straw for fertilization, which can be carried out by installing a device on the harvester for spraying the crushed straw mass with a working liquid using a pneumatic slot sprayer designed in Kuban State Agrarian University. The device and the process of operation of this device with pneumatic slotted sprayers of working fluid are considered. Various parameters of sprayers have been studied: the air pressure supplied to the spray jet and the position of the equalizing tank that regulate the static pressure of fertilizers for setting the specified flow rate.
The algorithm for determining the effect on the dynamic characteristics of the fuel composition on the properties of the working process of the gas-diesel engine
Authors: Akhtulov A L , Dadayan S E , Edigarov V R , Maly V V 
Published: December 2020

Abstract
The article deals with the method of determining the optimal composition of the components of the combined fuel taking into account the heat-dynamic tension in the operation of the diesel engine on a mixture of diesel fuel and natural gas, i.e. the gas-diesel cycle. The calculation was based on the method developed by A. V. Grinevetsky and M. N. Mezingom, taking into account the specific conditions of the diesel engine on a mixture of natural gas and diesel fuel. The peculiarity of the mathematical model is that the optimal composition of the fuel components is initially unknown and is indicated as an array. The search for the optimal ratio of fuel components will take into account the heat and Dynamo tension. The resulting model can be used in the study of the diesel engine on other alternative fuels. Thus, it is possible to significantly improve the quality of the fuel combustion process, thereby increasing the engine power and ensuring the environmental safety of exhaust gases.