bluuebunny/crossref_metadata_2025_split huggingface dataset:
Balanced management of innovative risks in the process of innovative development
Authors: Ponikarova A S , Zotov M A , Kadeeva E N 
Published: January 2020

Abstract
The article considers the issues of balanced management of innovative industrial risks as a mechanism to increase the efficiency of organizations innovative development. The place of this complex of management measures in the overall management system in the process of introducing innovations in the face of uncertainty and risks is determined. An augmented model of balanced management is proposed taking into account the innovative nature of company development and the risk factor. The role of innovative industrial risks is defined as a limitation of innovative development, and a method for effectiveness assessment of their balanced management by assessing the complex level of system survivability is developed. Thanks to this method, it is possible not only to assess the quality of the innovative industrial risks management system, but also to identify ways for its improvement and development.
Modelling the dynamics of an undercar generator with a v- belt drive of an isothermal railway vehicle
Authors: Bulavin Y P , Voron O A , Volkov I V 
Published: January 2020

Abstract
In this research work, mathematical modelling has been performed and the oscillations of the isothermal railway vehicle on the KVZ-I2 bogies with the v-belt drive of the undercar generator have been investigated. As a result, the natural frequencies of oscillations of the railway vehicle have been determined, the crew oscillations caused by random track irregularities have been investigated, the influence of the irregularities of the bogie frame on the generator oscillations has been evaluated.
Inverse Kinematic Problem of Movement of Six Degrees of Freedom Robotic Arm (Solved by a Numerical Method)
Authors: Kochetkov A V , Salov P M , Zakharov O V 
Published: January 2020

Abstract
Robot manipulators are widely used in engineering for solving various tasks in accordance with their purpose. Manipulators usually consist of sequentially connected rigid links and connections between them – joints. One of the most complex types of robot manipulators is the articulated robot, also called the Robotic Arm. It has a structure similar to a human arm with three rigid links and only rotational joints. Such a structure provides greater flexibility, manageability and versatility. At the same time, the accuracy is reduced and the kinematic calculation is complicated. The direct kinematic problem is fairly well known and is uniquely solved using Euler angles or quaternion matrices. At the same time, the inverse kinematic problem has a multivariate solution and, therefore, it must be an optimization. The article proposes a new approach to solving the inverse kinematic problem based on numerical methods and parametric optimization. Formulas of transformations of Cartesian coordinates for a direct kinematic problem act as a mathematical model. However, in the formulas, the angles of rotation of the joints are unknown. Their values are determined during the minimization of the objective function in the form of a sum of squares of the difference between the specified and obtained Cartesian coordinates of the end-effector. The article describes a robot with 6 Degrees of Freedom. Based on the above approach, modeling was performed in the MATLAB software environment. It is proposed to use the sum of the angles of the links of the robot as an optimization criterion. Analysis of the results showed that the optimal solution allows reducing the rotation angles of all links of the robot approximately two times.
Wear-resistant coatings based on niobium nitride
Authors: Tabakov V , Chikhranov A , Dolzhenko Y 
Published: January 2020

Abstract
The results of studies of the use of niobium nitride and its modifications as a material of wear-resistant coatings are presented. It is shown that coatings based on niobium nitride have higher values of mechanical properties. The use of such coatings changes the thermal and stress state and increases the shape stability of the cutting wedge of the tool, which reduces the intensity of wear.
Modeling of a high-power heating unit with pulse-width modulated control
Authors: Goltsov Yu A , Kizhuk A S , Rubanov V G , Yanochkina O O 
Published: January 2020

Abstract
We constructed a heating unit that can be used for provide the desired temperature regime of the technological equipment. Such type of a heating unit allow us to obtain a higher efficiency which is ensured by using a high-frequency switching power electronic converter with pulse-width modulated control. In this paper we also describe the transitions from regular periodic mode to chaos that can be observed in this high-power heating unit. The behavior of such a system can be described by a set of two coupled differential equations with discontinuous right-hand sides. We show that the transitions to chaos in this system are associated with the interplay between classical smooth bifurcations on one side and different forms of border-collision bifurcations on the other.
The laser-plasma cementation as a method of increasing the abrasive resistance of medium-alloy tool steels
Authors: Marinin Evgeny , Gavrilov Gennady , Belashova Irina 
Published: January 2020

Abstract
The paper is devoted to the study of resistance of medium alloy tool steels after laser-plasma cementation. The authors propose a method of increasing abrasive resistance by means of the combined effect of DC electric arc of reverse polarity and laser radiation. The increased concentration of carbon in the near-surface layer is provided by the erosion of the carbon electrode and melting due to the combined energy effect of laser radiation and electric arc. The formation regularities of the diffusion hardened layer are established. The modes of laser-plasma cementation and test results of the studied materials are presented. The reasons of resistance increase are revealed. The mechanical characteristics of the hardened surface layer are shown. The influence of the energy regimes of the technological process on the depth of the diffusion hardened layer is given.
Method for regulating welded deformations by local thermal extension in titanium alloys welding
Authors: Astafeva N A , Buzin A S 
Published: January 2020

Abstract
The article presents the results of the study of the influence of welding conditions on welding deformations of Ti samples. Welding using a non-consumable electrode in shielding gas was aimed at obtaining thin ribbed samples used in the aircraft building industry. The difficulty of welding a sheet with a stiffener is due to the occurrence of defects: changes in the surface geometry (angular deformations). The article aims to assess capability of controlling welding deformations using a tail heat sink due to local thermal tension for Ti alloy welded joints. The effect of welding conditions on the value of angular welding deformations of samples was determined. The best results were obtained for parts produced using a device designed by the author. The device combines gas protection of the cooling section of the welding joint and contributes to local thermal tension. The X-ray control did not identify internal defects in the joints produced by the standard method and the method using a tail heat sink. The tests showed that the use of a tail heat sink does not affect the structure and properties of welded joints made from the Ti-Al-Zn system alloy. The experiments proved the efficiency of the method for controlling welding deformations using a tail heat sink.
Improvement of operational characteristics of the assembly tool equipped
Authors: Artamonov E V , Tveryakov A M , Shtin A S 
Published: January 2020

Abstract
The article describes the studies of the performance of tool hard alloys using two different methods based on mechanical and physical properties. The studies were carried out in laboratory conditions without the use of metalworking machines, which is an undoubted advantage over persistent tests, where a lot of trial processing is necessary to assign rational operating conditions. A comparative analysis of the obtained experimental studies of the electromagnetic properties of replaceable cutting inserts made of tool hard alloys with the known results of studies on impact strength is given. The comparison results showed that the change in the state of the hard alloy diagnosed by impact strength correlates well with the results of studies of electromagnetic properties depending on the temperature in the range specific to the cutting process of materials. The data obtained with high accuracy make it possible according to the test results to assign rational processing modes corresponding to the temperatures at which the maximum operational characteristics of the tool are observed. As a result of the study, a scientifically based method for choosing rational performance processing was obtained, which is based on the physical and mechanical properties of tool materials, reacting to the structural changes during operation under the influence of high temperatures, and allowing to assign performance conditions providing the conditions to get maximum tool operability.
Production of Aluminum Matrix Composite Material by Internal Oxidation
Authors: Romanov A D , Romanova E A , Chernyshov E A 
Published: January 2020

Abstract
The scope of the use of aluminum-alloy-based metal-matrix composite materials has been expanding in recent years. However, the high cost of raw materials is a considerable deterrent to the widespread implementation of products made of such composites. Therefore, the ranges of the said materials commercial application are yet inadequate to their technical and operational capabilities. So, methods of making metal-matrix composite materials directly from a liquid melt are currently of interest. This paper presents the theoretical studies and the results of practical experiments for the production of metal-matrix composite material by the internal oxidation method. There are described the results of mechanical tests and the microstructure of specimens confirming theoretical assumptions in the oxidation of aluminum melt array. A comparative analysis is given for the cost of producing an alloy containing 30% of Al2O3 particles obtained by adding the Al2O3 powder and an alloy obtained by the internal oxidation of the aluminum melt. The studied technology provides for the formation of aluminum oxide directly in the aluminum melt, thus enabling to produce a composite material by a single-stage process and ensuring the process efficiency.
Strength, ductility and impact toughness of tube steels after hot rolling
Authors: Platov S I , Nekit V A , Maslennikov K B 
Published: January 2020

Abstract
The article is devoted to the study of mechanical properties of pipe steels after rolling on a broadband hot rolling mill. Using the methods of mathematical statistics, a close pair correlation between all the characteristics of the mechanical properties of hot-rolled sheet pipe steel is revealed. The results are obtained in production practice, they create additional opportunities to verify the results of expensive mechanical tests of pipe steels in order to reduce the cost of testing and improve the reliability of the results of their evaluation.
Simulating the rheological behaviour of an AlMg6/10% SiC metal matrix composite under high-temperature deformation
Authors: Smirnov A S , Konovalov A V , Muizemnek O Yu 
Published: January 2020

Abstract
The study presents the verification of a structural-hierarchical model of flow stress designed to describe the rheological behaviour of metal matrix composite materials. In the study, a composite with a matrix based on the AMg6 alloy reinforced with 10% silicon carbide is a model material. The model has been verified by experimental data obtained at a deformation temperature of 400 °C for strain rates ranging from 0.1 to 5 s-1. The identification results have shown that the model can be used to describe the rheological behaviour of metal matrix composites based on the AMg6 alloy under high-temperature plastic deformation.
Preparation and carring out of tests to assess the operation modes of a medium-duty cargo vehicle transmission
Authors: Toropov E I , Tumasov A V , Moshkov P C 
Published: January 2020

Abstract
This article discusses the achievements of Nizhny Novgorod State Technical University n.a. R.E. Alekseev specialists in the field of medium-duty truck Gazon Next testing in order to determine the engine operation modes and mechanical transmission in conditions close to operational. The latest achievements of measuring technologies for assessing the car performance properties are shown. The experimental characteristics obtained are necessary for the mechanical transmission robotic kit development.
Experimental studies of the snowmobile engine rubber-metal vibration dampers specifications
Authors: Diakov Aleksey S , Pozdeev Aleksey V , Lyashenko Mikhail V , Moskovskii Iaroslav V 
Published: January 2020

Abstract
The paper presents the methods and results of experimental determination of performance curves (flexibility and amortization characteristics) of two types of snowmobile engine rubber-metal vibration dampers with their stand radial and axial loading at different vibration amplitudes and frequencies using Macron BISS-ITW tensile testing machine. The obtained results were analyzed.
Hub dynamometric stand test features of the ATV engine and continuously variable transmission unit
Authors: Diakov Alexey , Salykin Evgeny , Potapov Pavel 
Published: January 2020

Abstract
This article discusses the ATV V-belt variator test features using hub dynamometric test stand. The problems encountered related to obtaining the necessary data for testing and ways to solve them are described, the test methodology, as well as examples of test results with their analysis are presented. The results of the study of the ATV transmission ratio are presented.
Development of CAD elements for automated selection component parts during assembly multi-bearing unit of an internal combustion engine
Authors: Petrukhin A V , Saninsky V A , Korzin V V 
Published: January 2020

Abstract
The article describes the implementation of the task of computer selection of component parts of multi-bearing units when using the computer-aided design system for internal combustion engines. Describes the elimination of harmful technological heredity of production of machines at the assembly stage, by means of an automated selection of liners to compensate for errors in the supports of crankcase, using the proposed mathematical model. A method for determining the optimal assembly option using an automated process control system for assembling multi-bearing support units is given. Given the functional structure of the system, illustrates the composition and application of elements of CAD in the framework of the proposed approach.
Effect of structure and texture on failure of pipe steel sheets produced by TMCP
Authors: Lobanov M L , Danilov S V , Urtsev V N 
Published: January 2020

Abstract
The method of orientation microscopy (EBSD) is used to study the structure and texture of low-carbon, low-alloy pipe steel sheets processed by controlled thermomechanical processing (TMCP). The temperatures of isothermal hot rolling varied. Samples cut from sheets showed a different properties during mechanical testing. The formation of cleavages (secondary cracks) during failure of steel is related to the presence of ferrite grains with orientation {001}<110> extended in the hot rolling direction. The formation of grains is a consequence of the isothermal hot rolling below the temperature Ac3 at TMCP.
Anticorrosive protection of the steam generator of the heat exchanger by the high-temperature oxidation method
Authors: Krivina L A , Tarasenko Yu P 
Published: January 2020

Abstract
The paper proposes a method of protection of steam generator tube systems from hot-salt corrosion that occurs during their operation. This method is based on heat oxidation, in which an anticorrosion oxide film of TiO2 type is formed on the surface of the tubes.
Development of a structurally similar element of a helicopter blade with an active twist system
Authors: Anoshkin A N , Barkanov E , Pisarev P V , Ashikhmin V A 
Published: January 2020

Abstract
A mathematical model is formulated for calculating the stress-strain state (SSS) of piezoelectric layered polymer composite materials (PCM) equipped with a control piezoactuator. The model implements the principle of thermo-piezoelectric analogy, which allows to move from the coupled boundary value problem of electroelasticity to the boundary value problem of thermoelasticity. The mathematical model was tested with a numerical calculation of the mechanical behavior of a sample structurally similar to a rotor blade, equipped with control piezo-actuators and made of equal strength and unidirectional fiberglass.
Calculation of the acoustic efficiency of smart resonant cells
Authors: Pisarev P V , Maksimova K A 
Published: January 2020

Abstract
In this work, numerical studies of the acoustic efficiency of prismatic resonators with adaptive neck diameters were carried out. In the process of research, the physical and mathematical models for predicting effective acoustic characteristics of a group of sound-absorbing structures cells with different neck diameters were formulated. The concept of the resonant frequency adaptive control and impedance of smart SAS cells by means of piezoelectric elements embedded into the neck is proposed. Verification of the developed numerical models has been carried out. According to the results of the numerical calculations, the dependences of the natural frequencies and sound absorption coefficients of the group of adaptive SAS cells were obtained for different variants of control modes (combinations of resonator neck diameters).
Numerical study of non-linear deformation processes of porous concrete
Authors: Balafendieva I S , Galimullin I A , Bajtemirov I K 
Published: January 2020

Abstract
In the work, on the basis of the determining relations between the increments of the true stresses and strains, in the framework of the finite-element discretization of the computational domain, the method of solving geometrically and physically nonlinear problems of the mechanics of a deformable solid body is implemented. A number of model problems of deforming elements of three-dimensional elastoplastic structures from solid and porous materials have been solved. It may be noted that there is a good agreement between the numerical results obtained by the proposed method and known solutions; some regularities of the deformation of structural elements made of porous materials were found.
Application of a decision support system in an industrial enterprise
Authors: Medvedev S N , Aksyonov K A , Aksyonova O P 
Published: January 2020

Abstract
Work at an industrial enterprise is associated with the constant adoption of management decisions at all levels, on which both the timeliness of order fulfilment and the efficiency of production capacity depend. The use of modern information technologies based on mathematical methods, allow you to make a decision knowing what should happen.
The design of the guide frame of the tunneling shield for laying communications under the riverbed
Authors: Letopolsky A B , Korchagin P A , Teterina I A 
Published: January 2020

Abstract
The article presents the option of improving the working equipment of the tunnel-boring complex for laying underground utilities, including trunk pipelines. The method of trenchless laying of underground utilities, consisting in a combination of methods of horizontal directional drilling and micro-channeling, is proposed. The proposed technology does not require the construction of a preliminary mine and a site for the installation of a drilling machine and allows one to combine in one working step the drilling of a well, the laying of a pipeline, welding and insulation works. Presents calculations aimed at determining the forces of movement of the shield, the definition of the power of the shield, as well as the calculation of the strength of the shield. The technique of carrying out technological operations is demonstrated taking into account the use of the proposed technical solution.
Study of efficiency of a 6x6 all-terrain vehicle in coastal zone
Authors: Belyaev A M , Belyakov V V , Makarov V S 
Published: January 2020

Abstract
In the paper, we consider relevance of autonomous mobile robotic system (AMRS) for coastal zones monitoring development. AMRS developed in Nizhny Novgorod State Technical University n.a. R.E. Alekseev is presented. General chassis characteristics are provided. The paper establishes four indicators of mobile chassis power efficiency: tractive force reserve under various operating conditions, tractive force for the certain probability of all soil surfaces, fuel consumption efficiency per 100 km, and the same indicator related to the carried load mass unit. Calculations based on the abovementioned indicators are made for 6x6 chassis, and for the track mover modification. The results show that on sand-gravel and sand roads power efficiency of wheeled chassis is 17-18% higher.
Development and research of functional coatings with laser modification
Authors: Gavrilov Gennady , Belashova Irina , Marinin Evgeny 
Published: January 2020

Abstract
The paper presents the study results of functional coatings of steel 45 formed by Ni, Cr, Mo, W alloying. The mechanical properties and relative resistance of steel 45 after alloying with these elements are presented. It is shown that the alloying coating thickness influence on the thickness of the functional coating. The analysis of the microstructure in the alloying area shows that the mass transfer of alloying components is realized mainly due to the convective motion of the melt. The surface tension of the melt depends on the temperature and the heterogeneity of the free surface heating of the alloying area. It was also found that the degree of hardening, the thickness and the microstructure of laser alloying depends on both the type of alloying component and the properties of the matrix material. The thickness of the alloying area depends not only on the thermophysical characteristics of the system but also on the energy parameters of the laser radiation.
Lay-out of cutting blades in an assembly basic rack of a counterpart rack for hob gears
Authors: Artamonov E V , Kireev V V , Zyryanov V A 
Published: January 2020

AbstractNowadays many Russian tool-making facilities which produce a metal-cutting tool for a processing of coarse-pitch tooth-wheels do not offer constructions of assembly hob gears with replaceable hard-alloy carbide blades. Creation of the assembly constructions for machine-building enterprises with the replaceable hard-alloy carbide blades (RHACB) is an effective solution for the processing of tooth wheels. Thanks to it productivity existing equipment increases many-fold, economical effectivity caused by implementation of the high-capacity tool allows to purchase modern equipment and make work of machine operators more effective and less labour-intensive. In this paper we offer a radical technical solution which allows to increase production efficiency of mechanical processing by a tool with lay-out of the hard-alloy carbide blades in the assembly basic rack of the counterpart rack in hob gears. Implementation of a group scheme in the assembly counterpart cutting rack is reached by means of usage of big amount of basic and side carbide blades on an Archimede’s tool worm that allows to cut away surplus consecutively and decrease depth of cut on the carbide blades. Also it allows to provide evenness of cutting and also decrease a value of blow stresses on cutting elements of the assembly tool. Due to usage of the replaceable hard-alloy carbide blades resistance and reliability of the assembly gear hob increases.