http://elartu.tntu.edu.ua/handle/lib/36264 International conference „Advanced Applied Energy and Information Technologies 2021“, ICAAEIT 2021 (Ternopil, 15-17 December 2021) 2026-04-20T19:22:56Z http://elartu.tntu.edu.ua/handle/lib/36959 Назва: Substantiation of design parameters of bernoulli grippers with automated control of the sizes of objects of manipulation Автори: Savkiv, Volodymyr; Mykhailyshyn, Roman; Duchon, Frantisek; Kelemen, Michal Короткий огляд (реферат): The advantages of using jet gripping devices with integrated function of size control of objects of manipulation in robotic systems are substantiated. Rational designs of gripping devices are proposed, which allow to measure the diameter of the object held by them, their design parameters are substantiated. The interaction of air flows flowing from the annular nozzle and measuring ejector nozzles in the gap between the outer surface of the jet gripper and the inner surface of the object of manipulation is carried out. Reynolds-averaged Navier-Stokes equations of viscous gas dynamics, SST-model of turbulence and γ-model of laminar-turbulent transition were used for this purpose. As a result of numerical simulation in the Ansys-CFX software environment, the influence of the spatial location of the measuring nozzles on the load capacity of the jet gripper, the range and accuracy of measuring the diameters of manipulation objects was determined. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36958 Назва: Light pulsed irradiation in growing seedlings Автори: Kotyk, Mariia; Andriychuk, Volodymyr; Spanik, Pavol; Kostyk, Liubov; Potalitcyn, Sergiy Короткий огляд (реферат): This work presents the research results of dynamic characteristics of ARPL-1W LEDs with a narrow-spectrum composition of luminescence (red, green, blue) using switching power supply of U-shaped pulses. Based on the results of increase and decrease of light flux and analysis of the kinetics of photosynthetic processes, from light absorption to absorption of CO2 from the atmosphere and the formation of carbohydrates, the LED irradiation installation is designed and approbated for growing seedlings. According to the results of experimental studies it is shown that pulsed irradiation stimulates faster plant growth without losing their morphometric parameters. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36955 Назва: Analysis of two section resonant voltage converter for matrix led light source drivers Автори: Lupenko, Anatolii; Sysak, Ivan; Frivaldsky, Michal; Chomko, Taras Короткий огляд (реферат): Analysis of two-section resonant DC-to-DC converter with phase power control, which is the basis of the matrix LED light source driver is carried out. Two-section converter is considered as a boundary case of the multi-section converter with one controlled section and other uncontrolled sections. Analysis is carried out by the fundamental harmonic approximation method. Analytical expressions for complex voltages and currents in the converter sections are determined, its control characteristic is obtained. It is shown that the converter power can be controlled within the range from the maximum value to zero. The problems of operation of section transistor switches in their zero-voltage switching mode is considered. The verification of the proposed analysis by means of converter simulation is carried out. The simulation results are in good agreement with the analysis results. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36954 Назва: Measuring device for photovoltaic modules electrical characteristics testing Автори: Koval, Vadym; Orobchuk, Bogdan; Kuzemko, Nataliia; Lijin, Gao Короткий огляд (реферат): There has been developed and produced a measuring device for measuring the electrical characteristics of photovoltaic modules. It has been experimentally tested. Its Volt-Ampere and Volt-Watt dependencies on its temperature and radiation spectrum have been collected. There have been made conclusions about device visible range spectrum radiation sensitivity and its effectiveness drop with temperature growth. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36952 Назва: Alphabetical index 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36953 Назва: Publishing page 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36956 Назва: Features of the enameled wires insulation diagnosing by voltage Автори: Vakulenko, Oleksandr; Sysak, Ivan; Babiuk, Serhii; Bunko, Vasyl Короткий огляд (реферат): It is established that the standard methods of the enameled wires insulation tests by voltage have low informativeness.The advantage of statistical modeling in the study of the enamel wires insulation defects is proved. The mathematical model of technological process influence of the electrical device coil element winding on the electrical strength of enameled wire insulation is presented. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36957 Назва: Kinetics of leds white lighting under pulse power supply Автори: Andriichuk, Volodimir; Nakonechyi, Myroslav; Filiuk, Yaroslav; Osadtsa, Yaroslav; Xinzhong, Gao Короткий огляд (реферат): The paper presents the results of the study of energy and dynamic characteristics of white glow LEDs FYL-3014 and ARPL-1W when powered by U-shaped pulses. Based on the obtained oscillograms, it is established that the increase and decrease of the luminous flux is described by an exponential dependence, from which the constants of the relaxation time are determined. As the frequency of the pulsed power supply increases, the time constant of increase and decrease of the luminous flux decreases. Based on the analysis of the parameters of the light flux LEDs kinetics and its behavior with a change in the frequency of the pulse supply and the amplitude of the pulses, it is shown that one-component phosphor YAG:Ce is used. The most energetically favorable frequency range of pulsed power supply FYL-3014 and ARPL-1W of white glow is from 1 to 100 kHz. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36951 Назва: Approach to gas consumption process forecasting on the basis of a mathematical model in the form of a random cyclic process Автори: Lupenko, Serhii; Lytvynenko, Iaroslav; Nazarevych, Oleg; Shymchuk, Grigorii; Hotovych, Volodymyr Короткий огляд (реферат): In the article, the approach to gas consumption process prediction on the basis of a mathematical model in the form of a cyclic random process is considered. The prediction is based on statistical information for previous years of gas consumption. An additive combination of three components was used as a mathematical model of gas consumption process: a cyclic random process, a trend component and a stochastic residue. The first component of the mathematical model in the form of a cyclic random process takes into account the scale factors, information about which is considered at the stage of prediction. Based on the caterpillar decomposition, ten components of the singular decomposition are obtained. The sum of nine components of singular decomposition forms a cyclic component – a cyclic random process. This component takes into account the scale factors of the amplitude of gas consumption process in each segment-cycle. The trend component of the mathematical model is the second component of the singular decomposition, and the stochastic residue is formed on the basis of the difference between the values of the studied gas consumption process and the sum of the cyclic and trend components. Computer simulation of realization of cyclic component of gas consumption process is carried out in the work, and also the annual forecast of gas consumption is made. The prediction results are compared with the real gas consumption process (information for last yearʼs gas consumption was used). This paper does not take into account the effects of climatic conditions on the gas consumption process, but this is going to be done in further research, which will improve the accuracy of computer simulation and prediction. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36950 Назва: Method of detecting radio signals with phase modulation in a mixture with noise Автори: Dunets, Vasyl; Martsenyuk, Anatoly; Kamchatna-Stepanova, Kateryna; Andreichuk, Bohdan Короткий огляд (реферат): Using Matlab software, a process of computer simulation of the phase modulation and demodulation process with different values of carrier frequency and phase deviation over the test signal in the form of an additive mixture of two deterministic sinusoidal signals under the influence of white Gaussian noise of various power. A justified method of detecting radio signals in a mixture with noise allows to expand the capabilities of radio systems, and the developed computer simulation model of radio signal is suitable for testing data processing algorithms to monitor and evaluate the signal-to-noise ratio in radio systems. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36947 Назва: Electromagnetic interferences in transistor converters and methods of interferences mitigation Автори: Gurin, Viktor K.; Pavlovskyi, Volodymyr O.; Yurchenko, Oleg M.; Senko, Vitaliy I. Короткий огляд (реферат): This paper describes the main types of conductive electromagnetic interference that occur in modern high-frequency transistor converters and shows methods for these interferences’ mitigation. A network interference-suppression device which makes it impossible penetration of conductive electromagnetic interference (EMI) from a consumer to a mains and back is introduced. The device also provides the complete galvanic decoupling between the power mains and the consumer. This is achieved through the introduction of an intermediate link between the consumer and the network, the link being powered by a rechargeable battery, and time separation of electrical energy between consumption and transmission cycles due to the special algorithm of charging and discharging the batteries of the consumer. It provides mutual protection of the consumer and the network from all types of conductive EMI, as well as protection of the consumer from possible electric shock. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36948 Назва: Model of motion route of unmanned aerial vehicles operations with obstacles avoidance Автори: Romaniuk, Leonid; Chykhira, Ihor; Tulaidan, Halyna; Mykytyshyn, Andriy Короткий огляд (реферат): The aerodynamic model of the group of unmanned aerial vehicles in space with obstacles is investigated in this paper, the model development is based on the methods of Dubins trajectory formation and Pythagorean spatial theorem concerning hodograph. It is determined that one of the classic trajectories used for unmanned aerial vehicle maneuver from one height to another is the intersection of circular spiral projected onto the X-Y plane in the form of a circle. The problem of obstacle avoidance is determined and Dubins diagram for two unmanned aerial vehicles routes in the environment with obstacles is given. On the basis of the specified scheme the algorithm of re-laying the UAV route with curvature adjustment by means of intermediate point which is taken out on the second scheme is described. Analysis of the known solutions in the field of increasing the route stability control for unmanned aerial vehicles and electronic suppression demonstrate the importance of the problem of forming the flight routes of unmanned aerial vehicles by passing opposing enemy areas, taking into account the peculiarities of air defense and electronic warfare application. The functional scheme of UAV recognition mechanism in the conditions of radio attacks is developed and the mechanism of formation of UAV safe movement in the conditions of radio attacks based on three basic techniques is defined. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36949 Назва: Computer tool for generating of test radio signals for verification of the radio computer systems software Автори: Khvostivska, Liliya; Dediv, Iryna; Khvostivskyy, Mykola; Dediv, Leonid Короткий огляд (реферат): A computer tool for generating test radio signals in the space of one repeat as an amplitude-modulated mix of composite waves of the radio signal transmitted in time space, and take into account repeat ability - as an amplitude-modulated mix of radio signals transmitted along the time axis of the k-th repeats. The developed computer tool provides a verification procedure the correct operation of the software of radio computer systems by generating test radio signals according to the specified parameters with high correctness of their reproduction and taking into account the properties of repeat ability and stochasticity. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36945 Назва: Mathematical modeling of high-frequency magamp switch B-H characteristic Автори: Yaskiv, Anna; Smedley, Keyue; Abramovitz, Alexander; Yaskiv, Volodymyr; Kasatkina, Natalia Короткий огляд (реферат): The current paper features a problem of high-frequency MagAmp switch modeling for computer aided design programmes to enable MagAmp power converters design automation. A new mathematical model of MagAmp switch B-H characteristic is presented. An algorithm of its computer integration is described. Dependence of B-H characteristic on switching frequency is investigated for two configurations of MagAmp switches with cores of amorphous Co-based alloy with rectangular hysteresis loop. The simulation results are obtained, and maximum modeling error is calculated. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36946 Назва: The process of shell formation and optimization by the criterion of accuracy of their geometric shape Автори: Dubynyak, Taras; Kruhlov, Volodymyr; Dzhydzhora, Roman; Oleksandra, Manziy; Stanislav, Andreichuk Короткий огляд (реферат): The research is devoted to the process of deformation of a two-dimensional grid. The difficulty of describing the deformation process is that the situation behaves when deformed, which is different from the sheet solid material. This is due to it possible rotation relative to the perpendicular wires of the grid from one structure to another in the nodes. In addition, as shown in more detail below, the conditions that must satisfy the solution are different from the standard ones: the surface that should lie after deformation is given, while the solutions applied to the grid in nodes remain unknown in the formulation of the problem. The deformation depends on the effort applied to the ends of the mesh element. The stiffness matrix of the element is located using the DIP-FEM package, for which a model of the element is created and at a given unit effort for each direction, the application of the displacement load is calculated. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36944 Назва: Theoretical and experimental aspects of optimal designing of dynamic vibration absorbers – rotating machines system Автори: Cherchyk, Hennadiy; Diveyev, Bohdan; Yuzefovych, Roman Короткий огляд (реферат): Significant issue in the development of modern machines is the reduction of vibration. Dynamic vibration absorbers are widely used to reduce vibration and noise levels in vehicle cabs, to reduce vibration of rotating machines, to reduce vibration amplitudes of various towers and structures and the like. Along with dynamic vibration absorbers tuned to the resonant frequency of the main design, DVAs used to reduce vibration in a given narrow frequency range are widely applied. These are, for example, turbo-generators, gas compressor units, pumps and other rotating machines with a standard speed over a period of exploitation time. Vibration in such machines is narrow-frequency and is caused by imbalances of rotating elements 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36943 Назва: Modeling of thermal process parameters in the ionosphere during the decline phase of solar activity CYCLE Автори: Kolodyazhnyi, Vyacheslav; Lyashenko, Mykhaylo Короткий огляд (реферат): Simulation of spatial-temporal variations of parameters of thermal processes in ionospheric plasma during the decline phase of solar activity cycle according to the Kharkiv incoherent scatter (IS) radar of is performed. For typical geophysical periods, the diurnal and altitude dependences of the energy supplied to the electron gas and the heat flux density transferred by electrons from the plasmasphere to the ionosphere are constructed. The analysis of spatial and temporal variations of parameters of thermal processes in the ionosphere is given. The obtained calculation results are used for further development of the CERIM IION regional model of ionosphere 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36938 Назва: Elaboration of the polarizer’s construction for work in Ka-band Автори: Duda, Serhij; Khymych, Hryhorij Короткий огляд (реферат): The problems of the polarizer`s construction over the basis of the circular waveguide for work in Ka-band are highlighted in the article. The purpose of the article is to establish the possibility of using the proposed design for the construction of high-tech Ka-band polarizers and to prove the correctness of analytical expressions for determining the structural dimensions by experimentally obtained characteristics. The analysis of the current decisions from the point of view of construction and technology is held. On the conclusion had been drawn more technological polarizer`s construction with the calculation of the main constructive sizes is proposed.Theoretical principles of construction and calculation of structural dimensions of the C and Ku ranges polarizersʼ phase-shifting sections are covered in detail in the works of modern researchers and tested on real devices. However, while constructing AFT elements designed to operate in higher frequency operating bands, such as the Ka-band (20/30 GHz), there are certain difficulties, the solution of which continues. In order to check the proposed decision, an experimental model of the polarizer was made and an investigation of the main characteristics corroborating the right theoretical assumption was held. For a practical study of the proposed design, a mock-up of a polarizer based on a round waveguide with an inner diameter of 11 millimeters was made. In the prototype, the rod structure was implemented in the form of five pairs of adjusting screws with a diameter of one millimeter. The final length of the polarizing plate, taking into account the smooth transitions designed to align the plate with the waveguide, was defined as the sum of the lengths of its regular part and one smooth transition multiplied by 0.9. The experimentally obtained characteristics confirm the possibility of using the proposed design for the construction of high-tech Ka-band polarizers, and the correctness of analytical expressions for determining the structural dimensions. Further development of the proposed solution may be the analysis and finding the necessary analytical relationships between the structural dimensions of the rod and dielectric structures in order to expand the operating range of the polarizer. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36939 Назва: The coronavirus disease COVID-19 Spreadi ng prediction in Ukraine by means of microsoft Excel Автори: Palaniza, Yuri; Shadrina, Halyna; Khvostivskyy, Mykola Короткий огляд (реферат): COVID-19 has completely eclipsed the morbidity, mortality, and economic impact of any other seasonal flu or communicable disease in the past century, and it is vitally important to have means that make it possible to predict its spreading. Analysis of the situation regarding the course of COVID-19 as well as diagrams of the future pandemic emphasizes their ability to change the configuration and behavior, which requires a rapid response to these changes. In view of this, an important factor is the efficiency and the need to develop a simple model, suitable for understanding even by non-specialists and with the possibility of use in the "field". Based on the Excel-project of the North-Western University, a system of automatic identification of the SIR-model (Susceptible, Infectious, Recovered) of COVID-19 was developed. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36942 Назва: Ensuring high high-precision testing of implants in the regulation of intra intra-eye pressure Автори: Tkachuk, Roman; Tkachuk, Andriy; Stadnik, Diana; Yanenko, Oleksiy Короткий огляд (реферат): Among the diseases that lead to partial or complete loss of visual function is glaucoma, which is characterized by increased intraocular pressure (IOP) due to changes in the structures of the eye and the human body, which inevitably leads to blindness. According to the WHO in 2020. more than 5 million people suffer from vision loss in glaucoma, which accounts for 13.5% of all cases of blindness in the world. Today this figure in Ukraine reaches more than 200 thousand patients. Visual problems significantly reduce the level of information perception and cause a pathological condition with progressive death of ganglion cell axons, which causes a decrease and complete loss of the visual field. Known methods of glaucoma treatment use drug therapy, laser therapy and surgical implantation of drainage devices. It was found that the main cause of the disease is a decrease in the speed of movement and outflow of intraocular fluid through the trabecular system of the eye, due to a significant increase in pressure. The optimal rate of fluid formation is normally 2-2.5 μl / min., Ie during the day through this natural system of the patient should be released in a controlled manner and about 3 ml. It is obvious that the implantation of drainage devices in glaucoma is performed after previous unsuccessful treatment procedures and is the last chance to preserve the patientʼs vision, provided that the rate of fluid leakage is successfully regulated. Therefore, there is often a need for preoperative individual selection of implants with the necessary parameters. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36941 Назва: The methods of biosignals processing and their implementation in the structure of the system of impaired human communicative function compensation Автори: Dozorska, Oksana; Dozorskyi, Vasil; Yavorska, Evhenia; Kapatsila, Yuriy; Pankiv, Iryna; Kubashok, Andriy Короткий огляд (реферат): The methods of biosignals processing and structure of the system of impaired human communicative function compensation are proposed. The methods of biosignals processing are based on the application of spectral-correlation analysis methods using the sliding window method and include preparatory and main stages. The sequence of steps of biosignals processing at the preparatory and main stages is substantiated. Also technical parameters and features of practical realization of constituent elements of the system of impaired human communicative function compensation are offered. The principle of operation of the system is based on the parallel selection and processing of electroencephalographic and electromyographic signals. At the same time the features of electrode constructions for selection of electroencephalographic signals, which are widespread today, as well as possible artifacts that will arise in the process of selection of these signals are analyzed. The design of electrodes for registration of electroencephalographic and electromyographic signals is proposed, the selection and processing of which is the basis of the method of indirect compensation of the impaired communicative function, which is realized by this system. A variant of realization of the functional diagram of the block of biosignals selection is proposed. The proposed design of the system of impaired human communicative function compensation can be manufactured using 3D printing technology, which will reduce its cost. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36940 Назва: Analysis of the complexity of algorithms for finding the coefficients of the mathematical model of lowintensity electroretinosignal Автори: Tymkiv, Pavlo Короткий огляд (реферат): The complexity of methods of parametric identification is analyzed and their comparison is carried out at definition of coefficients of mathematical model of response of a retina of an eye at decrease in intensity of test light irritation. The algorithm of parametric identification of the mathematical model of retinal response based on direct complete search has a significant time complexity, which prevents rapid readjustment of the expert system in the case ofremote, automated processing of low-intensity retinal response to diagnose the functional state of the body. Therefore, it is necessary to study the complexity of search algorithms and apply other approaches to solving problem of optimization or parameter identification. In this case, the criterion K of the optimality of the selection of coefficients will be the proximity of the simulated retinal response to the reference, pre-developed response. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36934 Назва: Some aspects of developing a multipurpose radio system for monitoring the geospace Автори: Bogomaz, Oleksandr; Barabash, Volodymyr; Iskra, Dmytro Короткий огляд (реферат): Hardware and software principles of building a multipurpose radio system for monitoring the geospace are considered. It is shown that Ettus Research USRP is the most suitable platform for such system. A structure of a multipurpose radio system for monitoring the geospace and developed software for VISCR2 ionosonde (based on USRP N200) as a part of this system are presented. The first results of testing new sowtware are shown. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36935 Назва: Methods to improve the accuracy of guidance of terrestrial antenna station Автори: Palamar, Mykhaylo; Yavorska, Myroslava; Bezrukovs, Vladislavs; Poikhalo, Anatolii; Kruglov, Volodymyr; Apostol, Yuriy; Batuk, Vitaliy Короткий огляд (реферат): The analysis of factors influencing accuracy of guidance of terrestrial antenna complexes and ways of improvement of a signal reception quality are considered. The above considerations are the result of authors many years practical experience in the AS ground stations setting and monitoring. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36937 Назва: Mechatronic approach to the design of a triaxial antenna with backlash minimization by the control system Автори: Palamar, Mykhaylo; Bezrukovs, Vladislavs; Nakonechny, Yuriy; Palamar, Andriy; Strembicky, Mykhailo; Pasternak, Yuriy Короткий огляд (реферат): The features and advantages of the support-rotating platforms design for the antenna systems with three axes are analyzed in the paper. The expediency of using such systems for the satellite tracking without signal losses in the zenith area relative to the coordinate of the antenna system is reasoned. It is necessary in order to expand the antenna system functionality, improve the performance of the antenna device, and increase the control system efficiency and the information reliability from the spacecraft as a whole. The developed design of the 3-axial support-rotating platform is described. The platform is built on a modular principle using of modern autonomous rotary actuators, which are combined by a special design. This approach is proposed in order to ensure backlash sampling using special software algorithms of the support-rotating device control system. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36936 Назва: Contents 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36933 Назва: Comparative analysis of computer systems for casting processes simulation Автори: Danylchenko, Larysa Короткий огляд (реферат): Casting processes simulation is one of the advanced research tendencies of foundry production. This article analyzes the current state and prospects for the development of innovative computer technologies in the national and world foundry. The main directions of the strategy for the further development of the foundry are formulated. An overview of the most well-known systems for computer modeling of foundry processes is presented, which allow simulating and controlling the quality of castings to maximize productivity and minimize defects. However, the choice of software for casting processes simulation is of decisive importance, which requires reliable information about the capabilities of computer programs and the principles of their operation. The purpose of the study is to carry out a comparative analysis of the most well-known systems for casting processes simulation and the possibility of their use for various casting methods. The software tools were compared by purpose, functionality, the number of simulated technological processes, the numerical method used for solving the problems of differential equations in the shaping of the casting, as well as the degree of completeness of the factors taken into account in the simulation. The research results can serve as recommended guidelines for specialists and managers of foundries on the choice of the necessary software, taking into account their requirements and the special aspects of the casting processes. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36930 Назва: Computer modeling of the stress stress-strain state of thin thin-walled tubular structural elements for predicting the limiting state Автори: Kozbur, Halyna; Shkodzinsky, Oleh; Kozbur, Ihor; Nadiia, Gashchyn Короткий огляд (реферат): If a thin-walled pipe loaded with internal pressure and axial tension allows the appearance of plastic strains, then the uniform plastic stability loss with the emergence of a local plastic deformation zone is considered the limit state, the corresponding stresses are considered as the limit ones. Correct prediction of the stress-strain state at the moment of strain localization requires taking into account the actual size of the loaded pipe and the calculation of true stresses. The paper proposes the implementation of the methodology of predicting the limit values of true stresses in the pipe at different ratios of internal pressure and axial tension values through the development of an algorithm for its computer modelling. Unlike existing, the methodology takes into account the physical and mechanical properties of the material, the type of stress state and the change in the actual dimensions of the loaded pipe. The algorithm is based on analytical dependences, established by the authors.For two grades of steels (carbon steel 45 and alloy steel 10MnH2MoV), an increase in the calculated strength threshold is shown with an insignificant additional load of a pipe loaded with pressure and axial tension. Analysis of the numerical results showed that it is possible to establish a balance between the actual geometry of the element and the load, which will solve the problem of finding the optimal ratio of «weight-strength», important for practical applications in aircraft, rocket and mechanical engineering. The developed computing modelling algorithm for finding the limit values of actual stresses makes it possible to calculate a realistic safety factor and make improved engineering solutions at the design and operation stages of structural elements; to increase the efficiency and safety of using pipeline and shell-type saving systems. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36932 Назва: Classification of rolled metal defects using residual neural networks Автори: Konovalenko, Ihor; Maruschak, Pavlo; Mosiy, Lyubomyr; Duchon, Frantisek; Kelemen, Michal Короткий огляд (реферат): The authors investigated deep residual neural networks, which are used to detect and classify defects found on the rolled metal surface. Based on the neural network with ResNet152 architecture, a classifier for recognizing defects of three classes was built. The proposed technique allows recognizing and classifying surface damage with high accuracy in real-time based on its image. The average binary accuracy of the classification made based on the test data is 97.3%. Neuron activation fields were studied in the convolutional layers of the model. The results obtained show that areas, which correspond to those with damage in the image, are activated. False-positive and false-negative cases of classifier application are investigated. Errors were found to occur most frequently in ambiguous situations when surface artefacts of different types are similar. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36931 Назва: Using a broadband signal based on m-sequence for automatic preventing of acoustic resonance in high pressure discharge lamps Автори: Medvid, Volodymyr; Beliakova, Iryna; Piscio, Vadim Короткий огляд (реферат): In the article, a method for preventing acoustic resonance of high-pressure lamps has been proposed. The main idea of which is the filing on the lamp of a modulated pseudo-random signal. For the set of a "discharge lamp - prototype of the device" an analysis of the spectral characteristics of the voltage on the lamp are made. The mathematical modeling of the set of a "discharge lamp - prototype of the device" is implemented. The results of simulation, which confirms the results of theoretical research, are presented. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36928 Назва: Construction and research of reverse frequency dividers Автори: Tsyrulnyk, Serhii; Tromsyuk, Volodymyr; Borodai, Yaroslav; Metelitsa, Artem; Tkachuk, Vasyl Короткий огляд (реферат): In the work, the reversible schemes of frequency dividers are constructed based on JK triggers are offered. It is proved that reversible frequency dividers work with insignificant differences in forward and reverse inclusions. When studying the frequency divider with direct inclusion, it was found that its real frequency differs from the calculated by 1.87%. And at return inclusion frequency dividers from are calculated on 2,17%. In general, such a relative error cannot be caused by the inaccuracy of the marker placement in the Multisim virtual oscilloscope. Such reversible frequency dividers can be used in unidirectional automated systems to build neural networks. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36926 Назва: The increasing of photovoltaic power supply system efficiency for the mobile unit of polymer waste processing into an alternative type of fuel Автори: Martynyuk, Valeriy; Fedula, Mykola; Makaryshkin, Denys; Kałaczyński, Tomasz 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36927 Назва: The mathematical modeling of coordinate determination of acoustic signals with priority placement of microphones Автори: Trembach, Bohdan; Trembach, Rostyslav; Mykhailyshyn, Mykhailo; Savkiv, Volodymyr; Mykhailyshyn, Roman Короткий огляд (реферат): The structural model of the spatial identification of sources of acoustic signals in Cartesian coordinates of a two-dimensional Hemming space with the priority placement of microphones as receivers of acoustic signals is proposed. [2] Examples of analytical calculations of the system characteristics of the hardware and time complexity of the correlation system based on a certain number of microphones and the corresponding number of interrelations are presented. The structural solutions of the hardware special processor implementation of such a class of multichannel devices for recognition and identification of types and the spatial location of sources of acoustic signals are developed. It is shown the possibility of using such a class of devices in the field of special military equipment. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36929 Назва: Use of computer computer-integrated technologies in training of engineering speciali specialists Автори: Vasylkiv, Vasyl; Pylypets, Myhajlo; Danylchenko, Larysa; Radyk, Dmytro Короткий огляд (реферат): The article considers the peculiarities of the use of computer-integrated technologies (CIT) for the training of specialists in engineering and technical specialties, analyzes the latest research and scientific publications on the introduction of information technologies in the educational process of higher technical educational institutions. Based on the theoretical analysis of scientific sources on the essence of CIT, the specifics of training future engineers and the study of practical experience, the scientific and pedagogical conditions for the use of computer-integrated technologies in the educational process were determined. The role, tasks and possibilities of CIT introduction for mastering engineering and technical disciplines are determined. Approaches to understanding the readiness of future engineers to use CIT during training are generalized. The peculiarities of the introduction of computer-integrated technologies in the educational process of training specialists of higher educational institutions in the specialty 131 "Applied Mechanics" are considered, the structuring of educational programs in this specialty is carried out. Ways to increase the efficiency of training of engineering skills in the specialty 131 "Applied Mechanics" given the widespread use of software products for mastering engineering disciplines. 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36925 Назва: Title 2021-12-15T00:00:00Z http://elartu.tntu.edu.ua/handle/lib/36266 Назва: Proceedings of International Conference „Advanced Applied Energy and Information Technologies“ 2021-12-15T00:00:00Z