bluuebunny/crossref_metadata_2025_split huggingface dataset:
Damping control system design for SamSat nanosatellite platform
Authors: Kramlikh A V , Lomaka I A , Nikolaev P N 
Published: May 2020

Abstract
In this paper, we discuss the experience of development of a damping control system, based on the B-dot algorithm, for the SamSat unified nanosatellite platform. This platform was created by the center of testing and development of nanosatellites of Samara University. We divide the stabilization process into four repetitive phases: measuring, computing, control and delay for relaxation. Each phase has its particular duration, which significantly influences on the stabilization process. To use the B-dot algorithm, it is necessary to calculate the derivatives of the measured components of the Earth magnetic field induction in the body frame of nanosatellite. The SamSat nanosatellite platform has two three-axis magnetometers, which are characterized by a high noise level. To reduce the impact of this noise, the accumulated measurements are smoothed by the least square method. We provide recommendations for the selection of the damping algorithm parameters such as phase duration and polynomial degree. We conducted laboratory tests on magnetic test bench, following results proofs the efficiency of designed damping control system.
Improving the durability of machine parts connections
Authors: Apazhev A K , Shekikhachev Y A , Egozhev A M , Shekikhacheva L Z , Egozhev A A 
Published: May 2020

Abstract
Durability is the most significant component of reliability, which, depending on the purpose of the object and its operating condition, also includes indicators of failure-free, maintainability and preservation separately or a combination of them (both for the object and for its parts). Improving the strength and durability of machine parts connections, in particular, agricultural, at the present stage is achieved by various methods, the main of which is the method of statistical analysis of connections loading. This method is based on the theory of fatigue damage accumulation followed by strength calculation. The known calculation methods of durability of agricultural machines parts, based on this theory, often involve the use of data on the operation of the machine parts and units, its speed, the surface relief processed by the machine in real operating conditions, as well as duration of the impact of various loads (dynamic, peak or shock). Currently, agricultural producers have increased requirements for the machines used. They are not satisfied with agricultural machines that are often idle for a long time as a result of malfunctions and failures. In critical periods of operation this leads to a decrease in the quality of work, productivity and, ultimately, crop yields. In this regard, it is necessary to develop new agricultural equipment that will be characterized by high operational reliability.
Implementation of the nonlinear programming algorithm when optimizing the final turning mode
Authors: Galkin M G , Smagin A S 
Published: May 2020

Abstract
For computer-aided multi-variant design of machining technologies, it is important to optimize the cutting parameters at the final pass in each technological operation. When carrying out designing procedures, there emerge problems relating to the algorithm of choosing the decision-making method, the objective function, and the regions of feasibility at final machining steps. Linear programming is time-consuming for multi-variant and multi-pass machining, if the algorithm is to be clear. It is known that when simulating the optimal metal-cutting process, the optimization criterion and the system of constraints are non-linear. Therefore, a computational algorithm can be made significantly more efficient if it is a non-linear algorithm based on Lagrange multipliers Such approach to design helps simplify automating the computational algorithm for multi-pass single-tool machining with a precision cutting tool (a reamer) This is the method discussed herein.
Durability increase of mining dump trucks through the use of protective coatings of the body
Authors: Lagunova Y A , Khoroshavin S A , Kalyanov A E 
Published: May 2020

Abstract
The share of trucking in the total cost of open-cast mining is 50% or more. Therefore, reducing transportation costs is one of the tasks of increasing the technical and economic indicators of an open development method, which is an urgent task. Performance dump truck is estimated either by the volume of transported rock mass (in cubic meter or tons), or the value of cargo turnover (ton-kilometers). However, these indicators do not take into account the percentage of adhering rock that is transported uselessly and reduces productivity. The paper proposes methods for protecting the body of a mining dump truck from clay rocks adhering. Detail the method of protection with the help of vibration using metal structure is considered. A mathematical model of the stress-strain state of a two-layer beam is proposed. The dependence of the stress in the body on the stiffness of the elastic supports and impact energy when using a rubber lining is shown.
Computing exact factors for two-sided tolerance limits in a normal distribution with unknown parameters in MATLAB
Authors: Borbatc N M , Chistokletov N Yu , Shkolina T V 
Published: May 2020

Abstract
MATLAB procedure is presented for calculating the exact factors used to find of two-sided tolerance limits in a normal distribution with unknown parameter values. The proposed procedure allows using arbitrary combinations of the sample size and the degrees of freedom of estimated variance. The procedure can be used in systems for processing the results of statistical quality control created on the basis of MATLAB.
Hydroabrasive machining of internal channels of parts obtained by SLM
Authors: Balyakin A V , Goncharov E S 
Published: May 2020

Abstract
The paper discusses the effect of hydro abrasive treatment on the inner surface of products obtained by selective laser melting (SLM). The hydro abrasive treatment effect on the faceting of these products has been investigated, the process simulated in ANSYS, and an area defined in which cavitation bubbles have occurred. The abrasive grain of black silicon carbide has been used as a filler; cylindrical samples printed of VT6 titanium alloy (an analog of Ti6Al4V) have been processed.
Digital control systems for asynchronous electrical drives with vector control principle
Authors: Jumaev O A , Sayfulin R R , Samadov A R , Arziyev E I , Jumaboyev E O 
Published: May 2020

Abstract
Problems of optimizing the operation modes of an asynchronous electric drive according to the criterion of the minimum stator current, as well as the optimal control system of an asynchronous motor with a reference rotor flow vector, which can be used for most serial frequency converters, longitudinal components of the stator current are added to the control channel.
Methods for assessing the strength of the blades of soil-cutting parts of forestry machines
Authors: Kretinin V I , Sokolova V A , Markov V A , Teppoev A V 
Published: May 2020

Abstract
One way of increasing the wear resistance of working bodies of forestry machines is the use of strengthening technologies. Working tools of tillage machines used in forestry are dampened as a result of edge damage during multiple strike impacts of solid soil inclusions along blade edge. The purpose is to identify the pattern of damage of the blade edge of the of soil-cutting parts of forestry machines and theoretically justify the algorithm of strength evaluation in order to determine the rational thickness of the wear-resistant coating during strengthening. Instrumental and analytical studies were carried out on the damage of the reinforced blade edges as a result of multiple impacts on the pendulum copra. Mathematically described is the process of blade edge failure. In the course of multiple strike impacts of soil solid inclusions on the blade edge, there will be accumulation of volumetric damage because of plastic crumpling or chipping. The sharpness of the self-sealing reinforced blade is determined by the thickness of the reinforcing layer and its ability to resist collapse under strike impactsize.
Theoretical justification of the feed preparation technology by the gear pelletizer
Authors: Frolov V Y , Samurganov E E , Samurganov G E 
Published: May 2020

Abstract
In order to provide the livestock industry in the Russian agro-industrial complex with a feed of the right quantity and quality, it is necessary to conduct research on the design and creation of a set of technical tools, applicable to large, medium and small farms. Scientific researches and development on the design and creation of models of such tools are carried out at the Department of Mechanization of animal husbandry and life safety of FSBEI HE Kuban SAU. In particular, the design of the gear-type pelletizer with the main working body consisting of a matrix with pressing channels and gears, engaged in the complex motion when rolling the matrix, was developed. The working process of pressing the material consisting of crushed grain fractions, by the pelletizer, was described. As a result of theoretical substantiation the significant formulas of channel outlet pressure and pelletizer’s performance were derived by the end of the article.
Peculiarities of choice of materials for pistons of heat engines
Authors: Skryabin M L , Kuklin S M 
Published: May 2020

Abstract
In the modern automotive industry, heat engine pistons must have sufficient strength characteristics to ensure the necessary reliability and durability under high dynamic, mechanical and thermal loads. Currently, aluminum alloys, cast iron, steel and composite materials are used in domestic and international practice for the production of pistons. The use of cheap reinforcing elements made of carbon materials instead of expensive ceramic and boron fibers, silicon carbide particles will significantly reduce the cost of pistons and make them more affordable for mass production.
Calculation of parameters for altering the ship’s course at sea using Artificial Neural Network (ANN)
Authors: Nguyen Thai Duong , Nguyen Trong Duc 
Published: May 2020

Abstract
During ship manoeuvring and course alteration, the trajectory of ship or the time of ship’s turning which remarkably affect safety and effectiveness of navigation depends on ship’s factor, meteorological factor and control factor. Simulation commonly is applied for methods used for calculating the ship’s trajectory. However, these computed results which are only applied for simulated cases or for certain external affected conditions are not reliable enough for navigation officers to predict the ship’s turning index in practical situations. In this article, authors propose the model for calculating the ship’s course alteration by applying artificial neural network in order to assist navigation officers making decision of manoeuvring ship safely and effectively, especially in emergency situations.
The method for determining the profile of large diameter pipes and the optimal technological mode during calibration-bending in the weld zone
Authors: Nguyen D C , Efremov D B 
Published: May 2020

Abstract
The article presents the results of finite-element modeling of the local calibration-bending process of large-diameter pipes in the weld zone with control of the dynamics changes in the geometry of the inner and outer surfaces of the workpiece, the base diameter, the total deformation of the perimeter and ovalization of the contours. The author has developed the technique of determining the coordinates of surface grid nodes based on an algorithm implemented in a special LUA-program for the QForm complex. The developed modeling technique allows us to determine the optimal working stroke of the tool and other parameters of the local calibration of the tube billet to minimize its degree of ovalization. An example of the implementation of the local calibration method and the predicted change in the geometry of the contour of the pipe billet with diameter φ1420×40 made of K60 steel with the initial shape defects after welding is given. The technical implementation of the method of local correction and prediction of the tube billet profile is complemented by the possibility of editing it by expansion. Improving the accuracy of geometry in the end zones of pipes will directly increase the possibility of high quality butt-welding during installation of pipeline systems.
Assessing energy efficiency factors in industrial companies
Authors: Kelchevskaya N R , Shirinkina E V , Atlasov I V 
Published: May 2020

Abstract
The relevance of the study is due to the fact that changes in the energy management policy at the national level, rising energy prices and increased state environmental control over production prompt industry to develop effective organizational and technical solutions in the field of energy management. The aim of the study is to identify energy management factors that determine the success or failure of the implementation of energy efficiency measures in industrial companies. In the empirical part of the study, the case-stage method was used to analyze the energy management practice of large metallurgical enterprises, where the problems of energy conservation are especially acute due to the high energy intensity of production. A promising direction in such an environment is the integration of structural components used to support decisions and social components represented by staff commitment and accumulated energy-efficient human capital. The main results can be applied in the practice of energy system management in the development of strategic planning processes, the adoption of sound investment decisions and the formation of energy-efficient human capital.
Modeling and typologization of rural areas by the level of agricultural production development and the population density farms
Authors: Korobeynikov D A , Ivanova N V , Ovchinnikov M A , Kolpakova E A , Tokarev K E 
Published: May 2020

Abstract
The article describes a method for clustering rural areas has been developed that involves building a composite index based on the aggregation of six individual indicators that comprehensively characterize the level of agricultural development. Regional differentiation of the calculated index values allowed us to identify five typological groups within which it is possible to trace the correlation between the level of agricultural development and population density. The first group included twenty-one subjects of the Russian Federation located in the European part of the country, with the most developed agriculture and a predominantly higher density of rural population in comparison with neighboring regions. The second group includes 24 subjects of the Russian Federation (including the most populated North Caucasian republics – Dagestan, Ingushetia, Kabardino-Balkaria) with a range of index values from 0,501 to 0,550, corresponding to developed agriculture. The third group includes 26 subjects of the Russian Federation with a range of index values from 0,401 to 0,500, indicating the average development of agricultural production, which is largely a consequence of the general socio-economic problems of the regions. The fourth group includes 5 subjects of Siberia and the Far East With a range of values of the complex index 0,351-0,400, which are characterized by unfavorable ground-climatic conditions that objectively limit the development of agriculture and rural territories. Six regions complete the rating, some of them belong to the Northern territories with unfavorable climatic conditions (Murmansk region, Nenets district, Yamalo-Nenets district), some are outsiders in terms of socio-economic development (Republic of North Ossetia-Alania, Republic of Altai, Republic of Khakassia).
The rationalization model of the use of enterprise resources
Authors: Lubnina A A , Bashkirtceva S A , Rajskaya M V , Zaripov R N 
Published: May 2020

Abstract
The article proposes a logical-informational model that allows to rationalize the use of enterprise resources, using the example of the mechanism for advanced training of personnel “innovative lift” FSBEI HE “KNRTU”. Implementation of innovative elevator mechanisms of FSBEI HE “KNRTU” allows to improve the process of adapting industrial and industrial personnel to the requirements of the profession, mastering professional competencies necessary to perform labor functions, including the implementation of scientific and technological developments and the commercialization of their results. Based on the model of rationalizing the use of enterprise resources, a software product has been developed based on solving linear programming problems aimed at maximizing the target indicator and rationalizing the distribution of resources within the framework of the organizational structure of the enterprise.
Decision making support for the development of new products based on Big Data technology
Authors: Shinkevich A I , Zaraychenko I A , Ivanova R P , Vodolazhskaya E L 
Published: May 2020

Abstract
The paper presents an analytical model for constructing a production system based on the application of the concept of big data. There are proposed a model for data collection and the architecture of a dynamic control system based on KPI modeling and construction of predictive models. A model for processing system data is developed, based on the use of a dynamic three-dimensional indexing data in the following areas: equipment, technology and schedule. Based on this approach, it is proposed to use the multiple linear regression model with fixing system constraints to solve the problem of optimizing production resources.
The problems of the machine-building enterprise economic development
Authors: Makarenya T A , Kazanskaya A Yu 
Published: May 2020

Abstract
The article is devoted to studying the problems of the machine-building enterprise development using the example of public joint stock company Taganrog Combine Plant “Krasny Kotelshchik” (PJSC TKZ “Krasny Kotelshchik”), located in the city of Taganrog, Rostov Region, Russian Federation. PJSC TKZ “Krasny Kotelshchik” is one of the leaders in the Russian boiler equipment market. Currently, equipment, manufactured at this plant, operates in more than 60 countries of the world. The main directions of equipment export in 2018 were the Community of independent states (CIS countries) – Belarus, Kazakhstan, Asia (Vietnam, India) and others. Despite the leading position in the boiler equipment market, this company is in a difficult financial situation. Therefore, the purpose of this article is to study factors affecting the success of a machine-building enterprise and determining the main promising areas of development.
Ensembles of criteria for determining the number of homogeneous groups in a combined batch of industrial production
Authors: Rozhnov I P , Kazakovtsev L A , Karaseva M V , Stupina A A , Lapunova E V 
Published: May 2020

Abstract
An article proposes a procedure for ensembles of criteria formation for determine automatically a number of clusters for dividing a combined batch of industrial production. It is shown that these ensembles of criteria can improve the accuracy of the separation of combined batches of industrial production into homogeneous ones.
Economic and mathematical analysis of efficiency leasing in the electronic industry
Authors: Kirillov Yu V 
Published: May 2020

Abstract
The article, using the example of electronic industry enterprises, examines the operation of financial leasing of high-tech equipment to upgrade fixed assets in order to produce competitive products. An analysis is made of the effectiveness of the use of equipment necessary for the production of leased (rented) equipment as a special investment project implemented by the lessee, in which rental payments are an investment part of the project, and the profit from the sale of manufactured products makes up its profitable part. Analytical indicators of reduced net income and profitability index are supplemented by a payback period indicator, for the calculation of which a laborious recursive-logical procedure is used in practice. To obtain an analytical expression of the payback period, an original technique was used based on replacing a discrete payment stream with a financially equivalent continuous stream of payments. The obtained analytical formula made it possible to determine the fundamental economic and mathematical conditions for the payback of this operation for the lessee.
Assessment of technical level of new, promising models of equipment at the stage of their development in modern engineering practice
Authors: Skrypnik I L , Ksenofontov Yu G , Kaverzneva T T , Rumyantseva N V , Kiss V V 
Published: May 2020

Abstract
The problems of optimizing the selection of the best new model of technology are considered, based on an assessment of its functioning as part of the complex system. The composite indicator of the product technical level is proposed as such an assessment characteristic. It is represented by six basic components and can be used at all stages of the model development. Models and methods for calculating a generalized indicator of quality, novelty of technical solutions, functional and constructive organization, adaptability to advanced technology, reliability of a sample, its graphical representation based on classical methods of probability theory, expert and heuristic estimates, an ideal center, graph theory taking into account the functional cost analysis have been prepared.
Factors determining the decision on spatial location of mechanical engineering production forces
Authors: Fefelov A A , Malanina Yu N 
Published: May 2020

Abstract
The article deals with the search for the optimal spatial location of mechanical engineering production systems at the present stage of economic development of Russia. Spatial location is considered as an important investment issue that requires careful economic justification as part of choosing the appropriate strategy. The search for the most suitable place for spatial placement depends largely on what the mechanical engineering production system itself is. The article presents the approaches of various researchers, which are still relevant and valid in modern Russia, since they are focused on territories with a predominantly rural type of economy and are well correlated with the current system of administrative and territorial management of our country. The article describes a number of factors that affect the choice of spatial location of mechanical engineering production facilities, among which are the natural, historical, social, technical, economical, as well as governmental and political factors. The article concludes that the final decision on the specialization of the Russian Federation subject and the spatial location of machine-building production in the region depends on the requests of the entrepreneurs in a particular industry and the level of development of productive forces.
Development of a proactive project monitoring model
Authors: Averina T A , Glushkov A Yu , Moiseev S I , Shevchenko L V 
Published: May 2020

Abstract
The article proposes a model of proactive monitoring of the project performance consisting of a set of works. This model will allow you to predict in advance the values of the principal features of the project, the main of which is its duration. The use of this model in project management tasks will make it possible to make decisions at earlier stages. In the case of predicting the excess of their critical values, it becomes possible to take measures to eliminate the problem in advance. The mathematical model is based on the methods of regression analysis, namely, on modeling and forecasting the trends of the time series, consisting of the project deadlines at various points in time. The results of computational experiments are presented, which showed that the developed forecasting model provides adequate estimates and the forecasting results are in good agreement with empirical data. In addition, the model depends on a small number of parameters, the influence of which is studied in this paper.