bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of industrial performance in terms of achieving quality goals
Authors: Anikeeva O V , Ivakhnenko A G , Storublev M L 
Published: December 2020

Abstract
An approach is developed to analyze the results of the industrial enterprise in terms of achieving quality goals. The results of approbation of the developed approach are presented on the example of ZAO NPP ‘ANA’ (St. Petersburg). Based on the mathematical models created earlier by the authors, stability conditions are obtained depending on the values of the parameters of the enterprise quality management system, which enables to solve the problems of managing the state of this system as a subsystem of general management. For the study, the following were used: apparatus of the automatic control theory, Data Mining methodology, and elements of a Balanced Scorecard.
Formation and selection methodology of digital transformations programs for an industrial enterprise using machine learning algorithms
Authors: Lukina S V , Makarov V V , Dobrolyubova M F , Krutyakova M V 
Published: December 2020

Abstract
The article developed a Methodology for the formation and selection of digital transformation programs of an industrial enterprise using machine learning algorithms. The method allows creating a set of valid alternative options for digital transformation programs for the production activity of an industrial enterprise by a set of workarounds for a multilayer graph model. The choice of the optimal program is carried out by assessing the weights of the workarounds of the graph by a set of Key Perfomance Inticators (KPIs). The method is based on the presentation of the structure of an industrial enterprise by weighted oriented graphs which determine the structure of a neural network, and its subsequent training on arrays of source information. Each hidden layer of the graph model determines any component of the production structure of the enterprise, and the neurons in them are the components of this structure. As a basic part of the digital transformation is determined a automated workstation and a cyber-physical system. The PyTorch library for the Python 3.8 programming language is used as the main tool for implementing the method.
Operational control algorithm of parameters of high-pressure sodium lamps based on a statistical time series model
Authors: Semenov A D , Volkov A V , Shchipakina N I 
Published: December 2020

Abstract
The developed operational control algorithm parameters of a high pressure sodium lamp is considered in this work. We used a mathematical model to develop the algorithm. An analytical method was used to describe the operation of a sodium lamp based on differential equations as well as an algorithm for evaluating time series. The mathematical expectation and dispersion were also evaluated. The described models for quality control of sodium lamps have been tested in production. The obtained simulation results coincide with the results of the experiment. Using a series of tests based on the proposed control method we confirmed the adequacy of the developed model.
On reqularization and vector optimization of machine design variables
Authors: Matusov L B 
Published: December 2020

Abstract
The correct determination of the feasible solutions set and the set of Pareto-optimal solutions are the most important in engineering optimization problems. To create a machine with optimal parameters, you need to know exactly the boundaries of the feasible set on which to search for these parameters. And to claim that the resulting machine design is optimal, we need to approximate the Pareto set with the necessary accuracy. To create a feasible set the method of obtain his constrains was proposed. Earlier, the results of our research on determining the rate of convergence of this method and approximation of feasible set of solutions were solved. In this paper, the problems of approximation and regularization Pareto optimal set are solved. Due to the fact that the set of Pareto-optimal solutions is not stable, even small errors in calculating the values of the system performance criteria can significantly change this set. It follows from this that, approximating a feasible solutions set with a given accuracy, we cannot guarantee approximations of the Pareto set. Such problems are called ill-posedaccording to Tikhonov. In these case reqularization of the Pareto-optimal set is a solution of these ill-posed problem.. To get a complete solution to this problem, acceptable for most practical tasks, is quite difficult. In this paper, this problem is solved for criteria that satisfy Lipschitz condition. The results obtained here are not only theoretical in nature, but are already used in the design and identification of parameters of mathematical models of machines.
Deformations and casting defects depending on the gating system for gas turbine engine castings
Authors: Inozemtsev A , Dubrovskaia A , Dongauzer K 
Published: December 2020

Abstract
The article covers researching the processes of pouring, crystallizing and cooling to room temperature, while simultaneously solving the related task of the stress-strain behaviour of the casting process in course of the heat-protective panels manufacture. The influence of the technological parameters of casting onto the development of the deformation defects was evaluated. The works were performed on incorporating predeformation into the burn-out model for compensating temperature deformations during casting, and on production and control of the above casting with predeformation.
Digital enterprise comprehensive evaluation
Authors: Polyanskov Yu V , Yardaeva M N , Lipatova S V , Lutoshkin I V 
Published: December 2020

Abstract
The article presents a method for a comprehensive evaluation of the activities of an aircraft building enterprise. Based on an integral presentation of management principles ‘just in time, risks management’ and ‘design to cost, risks management’, an assessment of the required quality and volume of production is proposed, considering the aggregated nature of indicators and the heterogeneous structure of the enterprise. An automation algorithm for the developed method is described. The methodology for implementation and use of the tool for comprehensive assessment of the aircraft building enterprise is presented.
Calculation and design of mechanical transmissions with the help of various computer-aided design in conditions of educational process
Authors: Kurasov Dmitry 
Published: December 2020

Abstract
The field of application of computer-aided design (CAD) is an integral part of the design of real-world products of construction, lifting-and-transportation, road vehicles, as well as the design of electronic products. Computer-aided design allow you to solve the most time-consuming and time-consuming tasks, carry out calculations, help you to represent the most accurate visualization of an object (3D visualization). The calculation and design of mechanical transmissions using CAD, which form the basis of most working machines, is an important component of the educational process in the training of future specialists in technical areas. In this work, some modules of computer-aided design have been analyzed to apply them to the educational process in the calculation of mechanical transmissions.
Applicability of statistical modelling in problems of cardiopulmonary resuscitation device’s state control
Authors: Osipov K , Krugovoy A , Novikov V 
Published: December 2020

Abstract
The methods of experimental study of complex machines cardiopulmonary resuscitation are developed. They involve the statistical modeling of the tested objects on the basis of technical parameter values and adaptive filtering, utilizing Kullback-Leibler information measure as a criterion of the state estimation. The measuring information on technical parameters obtained during their tests is analyzed as an example.
Multi-operation machine with tool redundancy as a two-component recoverable system with instantly replenished time reserve
Authors: Peschansky A , Kharchenko A , Yagyaev E 
Published: December 2020

Abstract
The object of the research is the technical system of a multi-operation machine tool, the tools of which can fail and be restored. The failed tool remains functional for some time due to a temporary reserve until a parametric failure occurs, the magnitude of which is random. All random variables describing the system have general distributions. The apparatus for constructing a mathematical model of the described system is a semi-Markov process with a discrete-continuous phase space of states. The stationary distribution of the embedded Markov chain is defined explicitly. For systems with parallel connection, the stationary time between failures of the system, the stationary time spent in the state of failure and the stationary system availability factor are found by the series of connections with disconnection and without disconnection of elements. The dependence of the stationary characteristics of the system on the size of the time reserve is demonstrated with a numerical example.
The Blagonravov Continuously Variable Transmission: importance of internal force functions for torque transforming
Authors: Yurkevich A V , Tereshin A V , Soldatkin V A 
Published: December 2020

Abstract
It is shown that the use of properties of the potential force field generated by the elastic forces to transform mechanical energy enables us to provide infinite kinematic and significant power ranges of mechanical transmission. An example of a kinematic diagram of the Blagonravov continuously variable transmission implementing this method is given. It is shown that the use of elastic forces in a continuously variable transmission with kinematically provided oscillatory motion of internal links in combination with mechanical rectifiers provides in the stop mode of the transmission the energy return to the drive motor while maintaining a significant moment on the transmission driven shaft. The mechanism of formation and the role of power functions in the transformation of the moment are described. The possibility of independent control of power functions and the rotational speed of the drive shaft of the transmission is shown. This property is fundamental and practical.
The influence of the hardening curve of a material on the results of torsion tests of notched specimens
Authors: Erpalov M V , Pavlov D A 
Published: December 2020

Abstract
The article is devoted to the study of rheological properties of metals and alloys in a hot state. A method for torsion testing of materials is considered. It is known that the strain heterogeneity is observed along the gauge length of cylindrical specimens during torsion. Its value can reach several tens of percent, depending on a material and the quality of specimen preparation. Therefore, torsion tests are often carried out on specimens having a notch of a certain shape. In this work, the method of finite element modeling is used to study the effect of the hardening curve of a material on the strain distribution along the gauge length of specimens with a circular notch, as well as on the strain evolution in the minimum section of the notch. Using 12Kh18N9T steel and VT–16 and VT–33 titanium alloys as an example, three different variants of a hardening curve are considered, namely, monotonic hardening, monotonic softening, and also the curve with a local maximum of stress. The results of the study have shown that the stress-strain behaviour of a material has a significant effect on the strain distribution along the notch length of the specimen. In addition, the dependence of the strain value in the minimum cross-section of the specimen on the twist angle cannot be predicted. It makes difficult to control a test setup when it is necessary to provide accurate strain rate values during the test. The use of notched specimens for torsion testing requires the development of new automatic-control systems for changing the strain rate values in the minimum cross-section of the notch according to a specified time law.
An algorithm for controlling the visco-elasto-plastic model for studying shock interaction processes
Authors: Lapshin V , Zenkov E 
Published: December 2020

Abstract
In engineering practice, dynamic processes are crucial. Therefore, modeling and research of these processes are urgent tasks. To study the shock processes, a mechanorheological visco-elasto-plastic model was developed. An important parameter of the model is a force corresponding to the occurrence of plastic deformations. An improved algorithm and a new computer program for studying impact processes using the visco-elasto-plastic model with adjustable elastic-plastic transformations were developed. Differential model motion equations were built. The conditions of transformations were studied for the transition from elastic to plastic deformations, from the loading stage to the unloading one. Functions of the model were described, an algorithm of the model was developed and described.
Vibration and impact properties of magnetorheological elastomers
Authors: Minaev A Ja , Korovkin Ju V , Valiev H H , Stepanov G V 
Published: December 2020

Abstract
The paper describes experimental research into the dynamic properties of magnetoactive elastic polymers. Tests on a vibrostendshow that in certain ranges the test material is able to change the frequency of resonance vibrations under the influence of magnetic fields. Experimental data obtained during testing a sample of magnetorheological elastomer under the load produced by an unbalanced rotor of an electric motor are presented. The results of impact load action are shown.
Hydropress assembling automation of interference fits with steel and titanium parts
Authors: Romanov A V , Shchenyatsky A V , Petrov A V 
Published: December 2020

Abstract
The main aspects of assembling automation of hydropress connections are considered – increasing the assembling performance, its stability and ensuring the quality of hydropress connections. A control system for the technological complex of hydropress assembling on a base of fuzzy logic methods has been developed, it provides the control of technological assembling modes, including: pressing speed, oil pressure, control of the force and pressing length, without identifying the parameters of assembling process, as well as the guaranteed presence of liquid friction in the non-linearity conditions of assembling process. The structure and control algorithm of automated hydropress assembling that ensure the maintenance of the working oil pressure during assembling are proposed. The algorithm is based on a set of feedbacks: pressure and position sensors, that provides a qualitative transition from boundary to liquid friction. A prototype of the technological complex of hydropress assembling of interference fits has been developed, that allows to assemble joints with a coupling diameter up to 50 mm in an automated mode. The results of experimental studies of automated assembling of steel and titanium joints are presented.
Practical aspects of constructing a specialized control system for compact machines
Authors: Nikishechkin P A , Kovalev I A , Kazaryan O V , Grigorev N S 
Published: December 2020

Abstract
In the presented article is considered the task of constructing a specialized system for implementing numerical control of various compact machine solutions that allows to process wood or metal or create parts from model plastic based on additive technologies. The control system must be flexible and, by its principles of construction and programming, be close to classical CNC systems, but not possess excessive functionality and corresponding price. The development of such compact machine-tool solutions will make it possible to use them both for small productions and for training specialized specialists in working with numerical control systems and in their programming.
Questions process simulation of metal forming
Authors: Novokschenov S L , Yatsenko S N , Milushev E H , Shibaev P B 
Published: December 2020

Abstract
Today, enterprises are faced with the problem of reducing the terms of design and technological preparation of production, which ultimately has a significant impact on the cost of production. In reducing time, CAD / CAM / CAE systems and CAD processes help today. In this regard, the aim of the article is to develop a model that allows you to choose the main technological equipment with a sufficient degree of reliability for hot forming processes. Research method, finite element method, which is used to analyze the stress-strain state of the forging. The results of the study are expressed in the obtained dependence, which allows you to choose the main technological equipment by weight of forgings. The conclusions obtained from the study are based on multivariate calculations by the finite element method for forgings of varying degrees of complexity, covering the most common range of crank hot stamping presses with a nominal force of 6.3 to 40 MN. The practical significance of the research results is to reduce the time of design and technological preparation of production by 15%. The proposed methodology and / or its results can be applied at enterprises engaged in the manufacture of parts by metal forming.
Development of a method and decision support system for distributing orders of a machine-building enterprise
Authors: Medvedev Stepan , Aksyonov Konstantin 
Published: December 2020

Abstract
The efficiency of the machine-building enterprise depends on the efficiency of management decisions at all levels, which affect the implementation of production orders, rational use of production resources. The use of modern information technologies which are based on mathematical methods allows you to make the right management decisions in a timely manner to improve the efficiency of the enterprise.
Hybrid device for automatic assembly
Authors: Vitliemov Pavel , Markov Krasimir 
Published: December 2020

Abstract
This paper presents a hybrid device for experimental investigation of the possibilities for enhances of the assembly processes’ quality. The developed hybrid device provides a successful running of the assembly, surmounting certain errors in the positioning of the parts and fending from breakage situations during wedging and jamming of the assembled parts. In the paper is presented in detail the device’s control system as two levels hierarchical structure.
Investigation of cylindrical hydrocyclone for emulsion separation
Authors: Valeev S I 
Published: December 2020

Abstract
Experimental studies of velocity and pressure fields in a cylindrical hydrocyclone to separate emulsions with a low content of light impurities (not more than 1%) are carried out. The obtained data enable us to conclude that in a cylindrical hydrocyclone optimum conditions for the separation of liquid particles are provided.
Diversification instruments for machine-building enterprises
Authors: Prilutskaya M A , Murukina A D , Tipner L M , Kalinina N A 
Published: December 2020

Abstract
Improving the competitiveness of engineering products, import substitution and increasing high-tech exports are priority government tasks. The development of the high-tech products production is ensured through the diversification of engineering enterprises. The study revealed a number of problems that machine-building enterprises are facing when mastering the production of new products. The diversification methods and tools used largely determine the effectiveness of activities throughout the entire product life cycle. The authors consider the value analysis method as a key instrument for implementing the diversification strategy. Value analysis includes a variety of instruments, such as conducting marketing and patent research, reverse engineering, cooperative chain design, and others. The determination of the company’s preparedness for diversification is of particular importance. The article presents an approach to assessing the key functional areas of the enterprise that indicate its preparedness for diversification.
Influence of concentration-time parameters on nitride coatings formation on VT6 titanium alloy and their stability during subsequent treatment
Authors: Gvozdeva O N , Shalin A V , Stepushin A S , Ovchinnikov A V 
Published: December 2020

Abstract
The possibility of using a titanium nitride coating as a «protective» layer against the penetration of hydrogen into VT6 titanium alloy semi-finished or finished products was shown in this article. It was found that the titanium nitride coating does not dissolve during high-temperature vacuum annealing and «isolates» sample sides from hydrogen penetration, which allows to form a linear gradient structure during subsequent thermal hydrogen treatment.
Numerical modelling of spatial distributions of the pH value and electric field in a liquid electrode
Authors: Askhatov R M , Kashapov N F , Kashapov R N , Chebakova V Yu 
Published: December 2020

Abstract
This paper presents a mathematical model of sodium hydroxide electrolysis with inert electrodes, which allows calculate the amount of gas released, as well as the spatial distribution of the electric field and the pH value.
Improving methodology for calculating scaffolding formwork of monolithic slabs in building constructions
Authors: Kondratenko V E , Devyatiarova V V , Albul S V , Kartyshev D S 
Published: December 2020

Abstract
Currently, when designing various residential buildings, there has been a tendency to use monolithic reinforced concrete to cover significant spans. The article proposes the calculation of the outside racks of volumetric scaffold. The bearing capacity of the outside racks is reduced due to eccentric compression of the racks. Alignment of the bearing capacity of the racks provides a span decrease in the placement of outside racks. At the same time, all racks experience central compression and work in the same conditions. This article is a continuation of the paper dedicated to the calculation of volumetric scaffolding of monolithic slab formwork, published in this volume. Article considers the calculation of the outside racks of formwork scaffold, which, in contrast to the intermediate ones, experience bending stresses due to asymmetric load.
Comparative analysis of adaptive systems for automatic stabilization of the water level in the drum boiler
Authors: Livshits M Yu , Igonin I D , Sevastyanov P A , Khapalina A A 
Published: December 2020

Abstract
The comparative analysis of two kinds of adaptive systems for automatically maintaining the water level in the drum of large boilers of thermal power plants is carried out with the stabilization of their dynamic characteristics in the face of changing parameters of the control object. The analysis is carried out with the purpose of determining the most effective adaptation method and development on its basis, a typical local adaptive automatic control system for various paths of energy steam boilers. As a control object, for example, the drum boiler feed circuit is selected because the process of changing the water level in the drum due to a violation of the material balance between water supply and water consumption is the most responsible and complicated due to the astatic type of its transfer function. Both systems are unidentified and contain a reference model in the adaptation loop. The advantages and disadvantages of the analyzed systems and the prospects for the application of adaptation methods laid down based on their construction are established.