bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reliability of plate of knife refiners
Authors: Vikharev S N 
Published: May 2020

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Abstract
The scientific problem of the synthesis of reconfigurable manufacturing systems is considered. Reconfigurable manufacturing systems are an integral part of self-reconfigurable factories in engineering. Self-reconfigurable plants operate on the basis of flexible and advanced lines equipped with RMS. A scheme is proposed for decomposing the requirements of the technical specifications for the design of self- reconfigurable plants in order to determine the particular requirements for individual components of the plant’s infrastructure. An algorithm for designing a different class of reconfigurable manufacturing systems is proposed.