676 results on '"Vitalii Ivanov"'
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2. Modelling of Flank and Crater Wear during Dry Turning of AISI 316L Stainless Steel as a Function of Tool Geometry Using the Response Surface Design
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Djordje Vukelic, Katica Simunovic, Vitalii Ivanov, Mario Sokac, Vladimir Kocovic, Zeljko Santosi, and Goran Simunovic
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crater wear ,dry turning ,flank wear ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The article investigates the influence of geometric parameters of CVD cutting inserts on flank and crater wear during dry turning. Turning of AISI 316L stainless steel was performed with different values of approach angles, rake angles, clearance angles, inclination angles and corner radii. After dry turning, the flank and crater wear of the cutting inserts were measured. The effects of the input parameters on the output parameters were evaluated using ANOVA. The results of the experiments showed that the flank and crater wear increases with increasing approach angle, rake angle, clearance angle, inclination angle and decreasing corner radius. Based on the test results, statistical models were developed to predict the distribution of flank and crater wear using the response surface design. The absolute and percentage errors obtained show that the models developed can be successfully used to predict flank and crater wear.
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- 2024
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3. New classification of industrial robotic gripping systems for sustainable production
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Vitalii Ivanov, Vladyslav Andrusyshyn, Ivan Pavlenko, Jan Pitel’, and Vladimir Bulej
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Medicine ,Science - Abstract
Abstract Robotics is an overarching trend in modern high-tech production, contributing significantly to automation. They are used in various industries to perform multiple tasks, and their number is constantly growing. Robots interact with the production object with the help of gripping systems, which are an essential component of industrial robots and manipulators designed for reliable grasping. Therefore, the process of design and rational selection of grippers for considering production conditions receives considerable attention worldwide. The article offers a comprehensive approach to the design of gripper systems as an integral element of the “gripping system – part – environment – production equipment” system to ensure further rational selection considering specific production conditions. A scientific approach to assessing the design of gripping systems was proposed to systematize knowledge in designing gripping systems. In the paper, the principal structural scheme of the robotic gripping system was developed, and the purpose of elements and design requirements were determined. Also, the sequence of stages in the process of selecting the elements of the gripping system has been proposed. The comprehensive system “gripping system – part – environment – production equipment” has been identified considering the mutual influence of structural elements. This work may be helpful to engineers and researchers while designing new gripping systems or selecting the most suitable one from the database. It can improve the rational selection of the element base and the structure of the gripping system by systematizing the experience in the gripper system design. Moreover, due to modern trends in automation and digitalization, the presented classification and coding system for gripping systems can be used in Computer Aided Process Planning and Computer Aided Gripping Systems Design systems. It can help to realize the approach “from the part geometry to the gripping systems design”. Also, it will ensure the production planning stage’s effectiveness due to reducing the time for robotic gripping systems’ design and increasing production safety, flexibility, autonomy, and performance.
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- 2024
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4. Effect of Strain and Surface Proximity on the Acceptor Grouping in ZnO
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Oksana Volnianska, Vitalii Ivanov, Lukasz Wachnicki, and Elzbieta Guziewicz
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Chemistry ,QD1-999 - Published
- 2023
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5. Corrosion Resistance of Coatings Based on Chromium and Aluminum of Titanium Alloy Ti-6Al-4V
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Tetiana Loskutova, Michael Scheffler, Ivan Pavlenko, Kamil Zidek, Inna Pohrebova, Nadiia Kharchenko, Iryna Smokovych, Oleksandr Dudka, Volodymyr Palyukh, Vitalii Ivanov, and Yaroslav Kononenko
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corrosion-resistant coating ,functional layer ,process innovation ,chemical-thermal treatment ,chromium ,aluminum ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Improvement of wear, corrosion, and heat-resistant properties of coatings to expand the operational capabilities of metals and alloys is an urgent problem for modern enterprises. Diffusion titanium, chromium, and aluminum-based coatings are widely used to solve this challenge. The article aims to obtain the corrosion-electrochemical properties and increase the microhardness of the obtained coatings compared with the initial Ti-6Al-4V alloy. For this purpose, corrosion resistance, massometric tests, and microstructural analysis were applied, considering various aggressive environments (acids, sodium carbonate, and hydrogen peroxide) at different concentrations, treatment temperatures, and saturation times. As a result, corrosion rates, polarization curves, and X-ray microstructures of the uncoated and coated Ti-6Al-4V titanium alloy samples were obtained. Histograms of corrosion inhibition ratio for the chromium–aluminum coatings in various environments were discussed. Overall, the microhardness of the obtained coatings was increased 2.3 times compared with the initial Ti-6Al-4V alloy. The corrosion-resistant chromaluminizing alloy in aqueous solutions of organic acids and hydrogen peroxide was recommended for practical application in conditions of exposure to titanium products.
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- 2024
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6. Fractional-order mathematical model of single-mass rotor dynamics and stability
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Ivan Pavlenko, Anton Verbovyi, Călin Neamţu, Vitalii Ivanov, Olaf Ciszak, and Justyna Trojanowska
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Fractional calculus ,Forced oscillation technique ,Damping force ,Stability analysis ,Critical frequency ,Process innovation ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Ensuring the vibration reliability of rotary machines is based on the reliable mathematical model of rotor movement. Considering the critical factors leading to a stability loss is an important problem in up-to-date machinery. However, the presence of fractional-order hydrodynamic features of gap seals and the effect of anomalous energy dissipation lead to a need to clarify existing rotordynamic models by considering the fractional-order terms. Therefore, this article deals with the comprehensive modeling approach to study forced oscillations of a single-mass rotor and check its dynamic stability considering the fractional-order origin of the damping force. Moreover, the impact of fractional order on the damping factor and dynamic stability of whirl movement considering the circulation force in gap seals, is still not fully explored. This problem adds particular importance to the presented research. As a result, a single-mass flexible rotor model was extended by considering the fractional-order damping force. Moreover, based on the discovered asymptotic property of the Mittag-Leffler function, the impact of fractional order on the amplitude-frequency response was also determined. Finally, boundaries for dynamic stability loss were identified considering the fractional-order damping force. Overall, the study allowed the development and substantiation of a more generalized scientific and methodological approach to ensuring the vibration reliability of rotary machines.
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- 2023
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7. Novel Gesture-Based Robot Programming Approach with the Ability of Code Reuse
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Vladyslav Andrusyshyn, Kamil Židek, Vitalii Ivanov, and Ján Piteľ
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teleoperation ,assembly ,gesture recognition ,production line ,collaborative robotics ,industrial growth ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
Nowadays, there is a worldwide demand to create new, simpler, and more intuitive methods for the manual programming of industrial robots. Gestures can allow the operator to interact with the robot more simply and naturally, as gestures are used in everyday life. The authors have developed and tested a gesture-based robot programming approach for part-handling applications. Compared to classic manual programming methods using jogging and lead-through, the gesture control method reduced wasted time by up to 70% and reduced the probability of operator error. In addition, the proposed method compares favorably with similar works in that the proposed approach allows one to write programs in the native programming language of the robot’s controller and allows the operator to control the gripper of an industrial robot.
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- 2024
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8. Physicochemical Conditions of Boron–Siliconizing of Molybdenum-Based Alloys in Chlorine and Fluorine Medium
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Tetiana Loskutova, Michael Scheffler, Vitalii Ivanov, Inna Pohrebova, Yaroslav Kononenko, Maryna Bobina, Nadiia Kharchenko, Marian Bartoszuk, and Ivan Pavlenko
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thermodynamics ,gas phase ,condensed phase ,partial pressure ,process innovation ,industrial growth ,Mining engineering. Metallurgy ,TN1-997 - Abstract
The physicochemical conditions of the siliconizing and boron–siliconizing processes of molybdenum-based alloys in a closed reaction space in an environment of chlorine and fluorine at reduced pressure were studied. Theoretical calculations of the equilibrium composition of systems with the participation of silicon, boron, molybdenum, nitrogen, oxygen, chlorine, and fluorine were carried out, which made it possible to determine the influence of process parameters (temperature, composition of the reaction medium) on the probable phase composition of the obtained coatings. Based on thermodynamic calculations, the composition and rational consumption of the initial powders and the temperature intervals of the chemical heat treatment (CHT) during the complex saturation of molybdenum-based alloys with silicon and boron were modeled. It was established that it is advisable to use chlorine as an activator, which leads to the formation of molybdenum chlorides MoCl4 and MoCl3 in the composition of the gas phase and can indicate the flow of exchange reactions between chlorides and the matrix of the processed material in the reaction space. The rational saturation temperature of alloys based on molybdenum with silicon and boron is determined—1100–1250 °C. The possibility of the existence of condensed phases MoSi2, MoB2.15, B6Si, MoB1.65, and MoB is shown.
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- 2024
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9. Approach to Determine Transport Delays at Unsignalized Intersections
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Olha Bieletska, Yevhen Liubyi, Serhii Ocheretenko, Dmitriy Muzylyov, Vitalii Ivanov, and Ivan Pavlenko
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transport systems ,sustainable transportation ,traffic control ,traffic flow ,sustainable cities ,queuing system ,field studies ,Transportation and communications ,HE1-9990 ,Science ,Transportation engineering ,TA1001-1280 - Abstract
This study proposes an approach to determine transport delays at unsignalized intersections, according to the theory of stationary Poisson flow and considering the priority of vehicle traffic in competing directions. The accuracy of the proposed approach was estimated by comparing the average values of delays of vehicles performing a left turn from a minor road and their actual values obtained as a result of processing data from field studies. The results of the accuracy evaluation at unsignalized intersections of non-equivalent roads indicate the obtained results' reliability, because the calculation error does not exceed 10 %, as well as the possibility of using the developed approach in the process of transport planning and unsignalized intersections modelling.
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- 2023
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10. Movement Monitoring System for a Pneumatic Muscle Actuator
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Oleksandr Sokolov, Aleksander Hosovsky, Vitalii Ivanov, and Ivan Pavlenko
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soft robotics ,process innovation ,pneumatic manipulator ,monitoring system ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Recent advancements in soft pneumatic robot research have demonstrated these robots’ capability to interact with the environment and humans in various ways. Their ability to move over rough terrain and grasp objects of irregular shape, regardless of position, has garnered significant interest in developing new pneumatic soft robots. Integrating industrial design with related technologies holds great promise for the future, potentially bringing about a new lifestyle and revolutionizing the industry. As robots become increasingly practical, there is a growing need for sensitivity, robustness, and efficiency improvements. It is anticipated that the development of these intelligent pneumatic soft robots will play a critical role in serving the needs of society and production shortly. The present article is concerned with developing a system for monitoring a pneumatic robot’s parameters, including a spatial coordinate system. The focus is on utilizing the relationship between the coordinates and pressure to model the movement of the soft robot within the MATLAB simulation environment.
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- 2023
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11. An Increase in the Energy Efficiency of R744 Heat-Using Thermotransformers
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Vyacheslav Arsenyev, Ján Piteľ, Oleksandr Korol, Serhii Sharapov, Jana Mižáková, Ivan Pavlenko, and Vitalii Ivanov
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energy efficiency ,thermotransformer ,carbon dioxide ,process innovation ,pressure ratio ,cycle coefficient of performance ,Technology - Abstract
This article deals with improving waste heat transformation in heat-using thermotransformers. Based on the directives of the European Commission on refrigeration equipment requirements, the possibility of using carbon dioxide (R744) in heat-using thermotransformers was evaluated. The possibility of the effective use of heat-using thermotransformers operating within the Chistyakov–Plotnikov cycle in the heat pump mode was assessed. As a result, a comparative analysis was performed with existing modern plants for combined cycles with an expander, for the expansion of CO2 in saturated steam, a suction gas heat exchanger (SGHE), and a compressor–expander unit. The design schemes with a throttling device and an SGHE were selected for a comparative analysis. As a result, calculation models for evaluating the operating parameters for the initial and proposed design schemes were developed. These models allow for evaluating thermodynamic and mode parameters for heat-reducing thermotransformers. They also allow for ensuring energy efficiency indicators and conversion factors for each cycle. Overall, the dependencies for the cycle conversion ratio for the pressure increase stage in the compressor were obtained for various under-recovery rates. Moreover, the cycle conversion ratios for the proposed design schemes were obtained depending on the discharge pressure of the first compressor. The proposed design schemes allow for increasing the energy efficiency of heat-using thermotransformers by an average of 23%, depending on the suction pressure in the compressor.
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- 2023
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12. Diffusion Nitride Coatings for Heat-Resistant Steels
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Khrystyna Berladir, Tetiana Hovorun, Vitalii Ivanov, Djordje Vukelic, and Ivan Pavlenko
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process innovation ,industrial growth ,heat-resistant steel ,AISI A290C1M ,ion nitriding ,nitriding in powder mixture ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
The effect of ion nitriding and nitriding in a melamine-based powder mixture on the structure and properties of AISI A290C1M steel was studied in the paper. Using ion nitriding made it possible to shorten the technological cycle’s duration by 5–6 times compared to two-stage nitriding, optimize the diffusion layer’s composition, provide a technologically simple process automation scheme, and improve the quality of nitride coatings. After the proposed mode of ion nitriding, a saturated layer depth of 0.25–0.32 mm, hardness up to 1000 HV, and an increase in wear resistance by 2.17 times were obtained. Using 95% melamine + 5% sodium fluoride during nitriding in a powder mixture significantly simplified the technological process. It did not require additional expensive equipment, which in turn significantly simplified the nitriding process with energy savings. The proposed technology and the composition of the mixture contributed to a significant acceleration of the nitriding process of AISI A290C1M steel, compared to traditional gas nitriding, and to obtain a hardness of the nitride layer of 970 HV and an increase in wear resistance by 2.6 times. A nitriding speed is explained by a significantly higher amount of atomic nitrogen when using melamine instead of ammonia and by the almost simultaneous disintegration of nanodispersed particles when the nitriding temperature was reached. After nitriding in a powder mixture, steel was subject to the slightest wear.
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- 2023
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13. Modeling of Traffic Flows Sustainability on Highway Network Stretches
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Viktor Vojtov, Dmitriy Muzylyov, Mykola Karnaukh, Andriy Kravtcov, Oleksiy Goryayinov, Tetiana Gorodetska, Vitalii Ivanov, and Ivan Pavlenko
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sustainability traffic flow ,mathematical modelling ,dynamic model ,density gradient ,velocity gradient ,stability criterion ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Assessing the transport flow robustness is a significant aspect of a qualitative solution to traffic management problems. Therefore, management should be based on appropriate criteria, accounting for different factors characterizing traffic flow sustainability. That’s why it is crucial to establish the impact rate for each group of factors on the robustness criterion. Therefore, the current study aims to obtain the dependence of the criterion changes for traffic flow sustainability on the traffic jam occurrence when changing the gradients’ product of traffic flow density and its speed. The value of the robustness criterion allows for performing an impact rating for input factors on traffic flow sustainability. All factors affecting transport flow robustness are divided into three groups. Based on simulation results, factors rating that impact the robustness margin value of the traffic flow is presented. Length and weight of automobiles are at first place according to impact terms on the sustainability loss of the traffic flow. In second place of impact on sustainability loss are the temporary factors group and factors group that considers the roadway environment’s infrastructure. Hence, the results can be used to analyze sustainability traffic flows in controlled highway network stretches and develop measures to increase sustainability reserve.
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- 2023
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14. Determination of contact points between workpiece and fixture elements as a tool for augmented reality in fixture design.
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Vitalii Ivanov, Ivan Pavlenko, Oleksandr Liaposhchenko, Oleksandr Gusak, and Vita Pavlenko
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- 2021
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15. An Increase in the Energy Efficiency of a New Design of Pumps for Nuclear Power Plants
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Ivan Pavlenko, Olaf Ciszak, Vladyslav Kondus, Oleksandr Ratushnyi, Oleksandr Ivchenko, Eduard Kolisnichenko, Oleksandr Kulikov, and Vitalii Ivanov
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energy efficiency ,centrifugal pump ,power consumption ,process innovation ,energy independence ,Technology - Abstract
The reliability of pumping units at nuclear power plants (NPPs) is critical in terms of their energy efficiency and safety. Remarkably, WWER-1000 reactors at Ukrainian NPPs are equipped with outdated pumping units that have already served their full-service life. This fact leads to an urgent need to develop a new, more efficient pump. In the article, a promising pump, ACNA 600-35, was developed. It was designed to increase the energy efficiency of pumps TX 800/70/8-K-2E, applied at the holding pool and the industrial circuit of the nuclear reactor. Since these pumps should be imported from the monopoly suppliers, this affects both the energy efficiency of pumping equipment and the energy independence of Eastern Europe. The proposed pump ACNA 600-35 is characterized by an increased efficiency of up to 0.12–0.13 compared with the TX 800/70/8-K-2E pump. In general, the life cycle cost of the proposed pump is 15–20% lower than for the analog TX 800/70/8-K-2E. The design of the developed pump ACNA 600-35 and the related pumping unit based on its production at industrial facilities allows for further development of the industrial and fuel-energy complex, increasing the state’s energy independence and employment. According to expert estimates, the average economic effect from supplying the developed pump can reach 10 mln USD/year.
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- 2023
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16. An Increase in the Energy Efficiency of Axial Turbines by Ensuring Vibration Reliability of Blade Milling
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Ivan Pavlenko, Serhii Kononenko, Krystian Czernek, Stanisław Witczak, Sergey Dobrotvorskiy, Yevhenia Basova, Vitalii Ivanov, Andżelika Krupińska, Magdalena Matuszak, Sylwia Włodarczak, and Marek Ochowiak
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energy efficiency ,high-speed machining ,process innovation ,industrial growth ,Technology - Abstract
Ensuring the vibration reliability of power equipment is one of the fundamental problems in modern power machinery. This problem has become more critical due to a permanent increase in the machining performance of high-speed milling of axial turbine blades. This article aims to identify reliable vibration parameters for high-speed milling of turbine blades to increase the energy efficiency of gas and steam turbines. For this purpose, mathematical models of free and forced oscillations of turbine blades during machining were developed. As a result of considering experimental and finite element analysis data, critical frequencies and corresponding mode shapes of free oscillations were identified using regression procedures by the best fit of analytical and empirical approaches. Additionally, after considering the forced oscillations of blades during high-speed machining, the magnitude of the specific cutting force and external damping ratio in the system ‘axial turbine blade and milling head’ were evaluated. The resulting magnitude of forced oscillations during machining was calculated. Finally, the amplitude–frequency response was also assessed, considering the machining parameters. Overall, the proposed methodology increases energy efficiency due to a decrease in the obtained machining quality of turbine blades.
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- 2023
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17. Effect of Impeller Trimming on the Energy Efficiency of the Counter-Rotating Pumping Stage
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Ivan Pavlenko, Oleksandr Kulikov, Oleksandr Ratushnyi, Vitalii Ivanov, Ján Piteľ, and Vladyslav Kondus
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energy efficiency ,centrifugal pump ,power consumption ,process innovation ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Developing ways to increase centrifugal pumps’ pressure and power characteristics is a critical problem in up-to-date engineering. There are many ways to resolve it, but each has advantages and flaws. The presented article aimed to ensure higher energy efficiency indicators by using a counter-rotating pumping stage with trimming. During the research, the comprehensive approach was based on CFD modeling and the Moore–Penrose pseudoinverse approach for overestimated systems. According to the obtained data, pumps with a counter-rotating stage allowed the pressure head to be significantly increased compared with the standard design of the flow part. Notably, for pumping units CPS 180/1900 with a basic stage, the pressure head of 127 m was reached. However, when using a counter-rotating stage, the pressure head could be increased up to 270 m, which was 2.1 times higher. Therefore, to ensure unchanged characteristics when using centrifugal pumps with the counter-rotating stage, the weight and size indicators can be significantly reduced compared to the traditional design scheme. The proposed numerical and analytical approaches allow estimating the highest pressure and energy characteristics values.
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- 2023
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18. Synthesis of the Energy-Saving Dry Dual Clutch Control Mechanism
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Nikolay Sergienko, Pavel Kalinin, Ivan Pavlenko, Marek Ochowiak, Vitalii Ivanov, Anton Sergienko, Natalia Pavlova, Yevheniia Basova, Oksana Titarenko, Aleksandr Nazarov, Andżelika Krupińska, Magdalena Matuszak, and Sylwia Włodarczak
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robotic transmission ,transport vehicle ,dual-clutch transmission ,torque ,clutch margin ,process innovation ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
A promising direction in developing up-to-date transport vehicles is the use of transmissions, an essential element of which is a dual-clutch. Improving functional performance, energy efficiency, and environmental friendliness are relevant and require appropriate research. The object of study is a dry dual-clutch working with a manual transmission with high energy efficiency. In the proposed design scheme, a rotary lever and a movable carriage can change the structural diagram of the force interaction between the pressure spring and the clutch discs. The developed mathematical model of the clutches control mechanism allowed for analyzing the process of controlling the dual-clutch transmissions (DCT) and obtaining functional dependencies between pushing forces in friction pairs and the carriage position. As a result, a method for synthesizing DCT was proposed to ensure the transmission of a given torque. Furthermore, it was determined and numerically proven that the same radial movement of the carriage when switching-on the clutches does not guarantee equal loading for the frictional discs of each clutch. This fact increases the uneven dynamics of torque and disc wear. Overall, the synthesis of the energy-saving dry dual-clutch control mechanism providing the same clutch margin for each clutch was developed. The method can be generalized and applied to designing dry dual-clutch transmissions for machines of various purposes.
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- 2023
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19. Statistical Optical Image Analysis for Information System.
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Oleksandr Ryazantsev, Ganna Khoroshun, Andrii Riazantsev, Vitalii Ivanov, and Aleksandr Baturin
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- 2019
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20. Using Computer Modeling and Artificial Neural Networks for Ensuring the Vibration Reliability of Rotors.
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Ivan Pavlenko, Calin Neamtu, Anton Verbovyi, Jan Pitel, Vitalii Ivanov, and Grigore Pop
- Published
- 2019
21. Improvement of the Dynamic Quality of Cantilever Boring Bars for Fine Boring
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Gennadii Oborskyi, Alexandr Orgiyan, Vitalii Ivanov, Anna Balaniuk, Ivan Pavlenko, and Justyna Trojanowska
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dynamic damper ,parametric vibrations ,process innovation ,frequency ,amplitude ,resonance ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
The paper presents ways to reduce the vibrations of special cantilever boring bars mounted on spindle heads of finishing and boring machines. Special cantilever boring bars are designed for machining holes in non-standard conditions, for example, when boring deep holes with l/d>3 (l–hole length, d-hole diameter) or holes with a discontinuous surface. The results of the experiments and theoretical developments, as well as the schemes of the experimental stands, are presented. The investigated methods for reducing fluctuations are the following: the use of a dynamic damper with intermittent cutting elements; the suppression of the normal vibrations of the cutter to the workpiece surface due to the excitation of vibrations directed tangentially to the workpiece surface and not causing processing errors; increased damping in the cutting zone when changing the design of the boring bar. The tuning parameters of the dynamic damper, the logarithmic decrement of vibrations, as well as the conditions for effective damping of vibrations during the interaction of their two coupled forms are given. The results are shown in the tables and graphs.
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- 2022
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22. Classification of Separation Equipment by Design and Technological Features
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Vitalii Ivanov, Ivan Pavlenko, Dagmar Caganova, Oleksandr Liaposhchenko, Maryna Demianenko, Yevhenii Lobov, and Oleksandr Golokhvost
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modular separation device ,technological classification ,flexible assembly ,Science ,Mathematics ,QA1-939 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Production range increasing causes many obstacles to ensure the work of the chemical industry. Production must respond quickly to the slightest change and must be customer-oriented. Due to this, there is a general trend towards increasing production flexibility by introducing modular systems. Thus, there is a need to classify existing solutions to develop flexible systems based on them. The article contains the analysis of chemical industry development tendencies, a methodology of research of modular separation devices, and their classification by design and technological features. The study result is a design and technological classification with a code that can optimize various separation devices. As a result of experimental research, preliminary and acceptance tests of experimental samples, the main hydrodynamic and separation characteristics of modular separation devices and combined multifunctional separators are determined: hydraulic resistance 0.15–2.00 kPa for units and 15–30 kPa for devices; effective capture of particles from the size of 5 μm; efficiency of separate stages of modular separation devices is about 70–90 %; efficiency of combined multifunctional separators is approximately 99.5–99.9 %. The offered multipurpose separators equipped with dynamically regulated modular separation devices do not concede to world analogs by the main technical characteristics of combined multistage separators worldwide.
- Published
- 2021
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23. Implementation of a DevOps Pipeline for Serverless Applications.
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Vitalii Ivanov and Kari Smolander
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- 2018
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24. Development of Flexible Fixtures with Incomplete Locating: Connecting Rods Machining Case Study
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Vitalii Ivanov, František Botko, Ivan Dehtiarov, Marek Kočiško, Artem Evtuhov, Ivan Pavlenko, and Justyna Trojanowska
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fixture design ,machining ,sustainable manufacturing ,process innovation ,complex-shape part ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
The rapid development of manufacturing in recent years has led to a significant expansion of the technological capabilities of modern metal-cutting equipment. Therefore, the modern approach to intensifying production requires an advanced fixture design. Design and manufacture of flexible fixtures capable of machining similar shapes and sizes of complex geometry parts reduce setup time. The article aims to design flexible fixtures for parts such as one-piece connecting rods under incomplete locating conditions. The advantages are the minimum number of parts and tool availability for multi-axis machining connecting rods in one setup. This approach, combined with up-to-date machining centers and industrial robots, can increase the production efficiency of manufacturing non-removable connecting rods. This effectiveness is in a decrease in the number of operations by 5–7 times, fixtures—by 3–4 times, and machine tools—by 3–5 times, depending on the type of a non-removable connecting rod and its design features. The numerical simulation results of the proposed fixture design confirmed the comprehensive technological capabilities and dynamic characteristics. Particularly, a decrease in displacements and oscillation amplitudes up to 7% compared to the full-basing locating chart was provided. It is determined that the system “fixture–workpiece” entirely meets all the strength, accuracy, and rigidity parameters, which allows you to perform machining with intensive cutting modes. The amplitudes of oscillations do not exceed the tolerances on the dimensions of these surfaces, established by requirements for non-removable connecting rods, and all displacements are elastic. During numerical simulation, the workpiece position remained stable at all machining steps.
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- 2022
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25. Locating Chart Choice Based on the Decision-Making Approach
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Vitalii Ivanov, Frantisek Botko, Vitalii Kolos, Ivan Pavlenko, Michal Hatala, Katarzyna Antosz, and Justyna Trojanowska
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sustainable manufacturing ,flexible fixture ,decision making ,product innovation ,CAFD ,production planning ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Modern manufacturing engineering requires quick and reasonable solutions during the production planning stage, ensuring production efficiency and cost reduction. This research aims to create a scientific approach to the rational choice of a locating chart for complexly shaped parts. It is an important stage during the manufacturing technology and fixture design process. The systematization of the designed and technological features of complexly shaped parts and the definition of the features that impact a locating chart create the fundamentals for justification. A scientific approach has been developed using the complex combination of the part’s features and a decision-making approach using the example of bracket-type parts. The matrix of design and technological features of parts was developed including steel AISI 3135 and cast iron DIN 1691. The classification of locating charts for bracket-type parts was defined. A mathematical model of the rational choice of the locating chart according to the structural code of the workpiece was verified in case studies from the practice. As a result, a decision-making approach was applied to the rational choice of the locating chart for any bracket-type part. The proposed solutions improve the production planning stage for machine building, automotive, and other industries.
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- 2022
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26. Using Regression Analysis for Automated Material Selection in Smart Manufacturing
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Ivan Pavlenko, Ján Piteľ, Vitalii Ivanov, Kristina Berladir, Jana Mižáková, Vitalii Kolos, and Justyna Trojanowska
- Subjects
mechanical properties ,phase composition ,process innovation ,predictive maintenance ,decision-making approach ,industrial growth ,Mathematics ,QA1-939 - Abstract
In intelligent manufacturing, the phase content and physical and mechanical properties of construction materials can vary due to different suppliers of blanks manufacturers. Therefore, evaluating the composition and properties for implementing a decision-making approach in material selection using up-to-date software is a topical problem in smart manufacturing. Therefore, the article aims to develop a comprehensive automated material selection approach. The proposed method is based on the comprehensive use of normalization and probability approaches and the linear regression procedure formulated in a matrix form. As a result of the study, analytical dependencies for automated material selection were developed. Based on the hypotheses about the impact of the phase composition on physical and mechanical properties, the proposed approach was proven qualitatively and quantitively for carbon steels from AISI 1010 to AISI 1060. The achieved results allowed evaluating the phase composition and physical properties for an arbitrary material from a particular group by its mechanical properties. Overall, an automated material selection approach based on decision-making criteria is helpful for mechanical engineering, smart manufacturing, and industrial engineering purposes.
- Published
- 2022
- Full Text
- View/download PDF
27. The Effect of Blade Angle Deviation on Mixed Inflow Turbine Performances
- Author
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Mohammed Amine Chelabi, Milan Saga, Ivan Kuric, Yevheniia Basova, Sergey Dobrotvorskiy, Vitalii Ivanov, and Ivan Pavlenko
- Subjects
energy efficiency ,industrial growth ,mixed turbine ,blade ,hub ,shroud ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
The choice of blades for mixed turbines is to achieve the required deflection with minimal losses. In addition, it is necessary that the blade functions without a detachment in a wide area outside the nominal operating point of the machine. In the blade profile study, it is required to satisfy the conditions relating to fluid mechanics and those relating to the possibility of realization of construction. The work carried out presents the effect of the blade deviation angle on the geometric blade shape and the performance of the mixed inflow turbine on keeping the same rotor casing in order to improve its performances. It was remarked that the efficiency is proportional to the deviation angle’s increase, but the rotor became heavy. It has been determined that the effect of the blade deviation angle on mixed inflow performances decreases dramatically starting from the angle −20° for a 100% of machine load. It was urged to avoid relying on angles greater than −20 as values for blade deviation angles. The study noted that the maximum obtained in the output work and power is related to the highest the efficiency for a specific optimum design case (−35° of deviation blade angle) due to the increase in the contact surface between the blade and the fluid, but the problem is that the rotor gets a little heavy (4.37% weight gain). Among recommendations, attention was given to the more significant absolute exit kinetic energies, for values of deviation blade angle between -10° and −20°, where an exhaust diffuser is recommended to use to recover a part of it into a greater expansion ratio. These simulation results were obtained using a CFD calculation code-named CFX.15. This code allowed for the resolution of the averaged dynamic equations governing the stationary, compressible, and viscous internal flow.
- Published
- 2022
- Full Text
- View/download PDF
28. Classification of Separation Equipment by Design and Technological Features.
- Author
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Vitalii Ivanov, Ivan Pavlenko, Dagmar Cagánová, Oleksandr Liaposhchenko, Maryna Demianenko, Yevhenii Lobov, and Oleksandr Golokhvost
- Published
- 2022
- Full Text
- View/download PDF
29. Quality Assessment of Teaching the Disciplines in the E-learning Environment of Sumy State University.
- Author
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Yuliia Denysenko, Vitalii Ivanov, and Oleksandr Ivchenko
- Published
- 2017
30. Impact of Magnetic-Pulse and Chemical-Thermal Treatment on Alloyed Steels’ Surface Layer
- Author
-
Kateryna Kostyk, Ivan Kuric, Milan Saga, Viktoriia Kostyk, Vitalii Ivanov, Viktor Kovalov, and Ivan Pavlenko
- Subjects
sustainable manufacturing ,alloy steel ,hard alloys ,surface hardening ,magnetic-pulse treatment ,nitriding ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
The relevant problem is searching for up-to-date methods to improve tools and machine parts’ performance due to the hardening of surface layers. This article shows that, after the magnetic-pulse treatment of bearing steel Cr15, its surface microhardness was increased by 40–50% compared to baseline. In this case, the depth of the hardened layer was 0.08–0.1 mm. The magnetic-pulse processing of hard alloys reduces the coefficient of microhardness variation from 0.13 to 0.06. A decrease in the coefficient of variation of wear resistance from 0.48 to 0.27 indicates the increased stability of physical and mechanical properties. The nitriding of alloy steels was accelerated 10-fold that of traditional gas upon receipt of the hardened layer depth of 0.3–0.5 mm. As a result, the surface hardness was increased to 12.7 GPa. Boriding in the nano-dispersed powder was accelerated 2–3-fold compared to existing technologies while ensuring surface hardness up to 21–23 GPa with a boride layer thickness of up to 0.073 mm. Experimental data showed that the cutting tool equipped with inserts from WC92Co8 and WC79TiC15 has a resistance relative to the untreated WC92Co8 higher by 183% and WC85TiC6Co9—than 200%. Depending on alloy steel, nitriding allowed us to raise wear resistance by 120–177%, boriding—by 180–340%, and magneto-pulse treatment—by more than 183–200%.
- Published
- 2022
- Full Text
- View/download PDF
31. Method for an Effective Selection of Tools and Cutting Conditions during Precise Turning of Non-Alloy Quality Steel C45
- Author
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Oleksandr Ivchenko, Vitalii Ivanov, Justyna Trojanowska, Dmytro Zhyhylii, Olaf Ciszak, Olha Zaloha, Ivan Pavlenko, and Dmytro Hladyshev
- Subjects
edge cutting tool ,finite element model ,precision machining ,cutting process ,industrial growth ,simulation design ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
The paper presents a constructing methodology for a modern approach to tools selection and solving the problem of assigning optimal cutting parameters for specific production conditions. The mathematical formulation determining the extreme values of the technological process optimality criteria is obtained. A system of technical and economic quality indicators for cutting tools is proposed. This system allows principles’ implementation of decentralization and interoperability “Industry 4.0” via finite element modeling of the cutting process based on solving the problem of orthogonal free cutting modeling. The proposed methodology further usage is possible by creating a standardized database on the parameters of the tool: the adhesive component of the friction cutting coefficient for processing of a specific pair of cutting and tool materials (or tool coating material) and the impacts of the cutting-edge radius on cutting efficiency of a particular material.
- Published
- 2022
- Full Text
- View/download PDF
32. The modelling of temperature-dependent stress-strain curves for weldable steels
- Author
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Jerzy Winczek, Miloš Mičian, and Vitalii Ivanov
- Subjects
Applied mathematics. Quantitative methods ,T57-57.97 - Published
- 2018
- Full Text
- View/download PDF
33. Information Support of the Computer-aided Fixture Design System.
- Author
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Vitalii Ivanov, Svitlana Vashchenko, and Yiming Kevin Rong
- Published
- 2016
34. Estimation of Wear Resistance for Multilayer Coatings Obtained by Nitrogenchroming
- Author
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Ivan Pavlenko, Jozef Zajac, Nadiia Kharchenko, Ján Duplák, Vitalii Ivanov, and Kateryna Kostyk
- Subjects
sample ,counterbody ,chemical-thermal treatment ,layer density ,mass loss distribution ,wear resistance ,Mining engineering. Metallurgy ,TN1-997 - Abstract
This article deals with improving the wear resistance of multilayer coatings as a fundamental problem in metal surface treatment, strengthening elements of cutting tools, and ensuring the reliability of machine parts. It aims to evaluate the wear depth for multilayer coatings by the mass loss distribution in layers. The article’s primary purpose is to develop a mathematical method for assessing the value of wear for multilayer steel-based coatings. The study material is a multilayer coating applied to steel DIN C80W1. The research was performed using up-to-date laboratory equipment. Nitrogenchroming has been realized under overpressure in two successive stages: nitriding for 36 h at temperature 540 °C and chromizing during 4 h at temperature 1050 °C. The complex analysis included several options: X-ray phase analysis, local micro-X-ray spectral analysis, durometric analysis, and determination of wear resistance. These analyses showed that after nitrogenchroming, the three-layer protective coating from Cr23C6, Cr7C3, and Cr2N was formed on the steel surface. Spectral analysis indicated that the maximum amount of chromium 92.2% is in the first layer from Cr23C6. The maximum amount of carbon 8.9% characterizes the layer from Cr7C3. Nitrogen is concentrated mainly in the Cr2N layer, and its maximum amount is 9.4%. Additionally, it was determined that the minimum wear is typical for steel DIN C80W1 after nitrogenchroming. The weight loss of steel samples by 25 mg was obtained. This value differs by 3.6% from the results evaluated analytically using the developed mathematical model of wear of multilayer coatings after complex metallization of steel DIN C80W1. As a result, the impact of the loading mode on the wear intensity of steel was established. As the loading time increases, the friction coefficient of the coated samples decreases. Among the studied samples, plates from steel DIN C80W1 have the lowest friction coefficient after nitrogenchroming. Additionally, a linear dependence of the mass losses on the wearing time was obtained for carbide and nitride coatings. Finally, an increase in loading time leads to an increase in the wear intensity of steels after nitrogenchroming. The achieved scientific results are applicable in developing methods of chemical-thermal treatment, improving the wear resistance of multilayer coatings, and strengthening highly loaded machine parts and cutting tools.
- Published
- 2021
- Full Text
- View/download PDF
35. Effect of Impeller Trimming on the Energy Efficiency of the Counter-Rotating Pumping Stage
- Author
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Oleksandr Kulikov, Ján Piteľ, Оleksandr Ratushnyi, Ivan Pavlenko, Vitalii Ivanov, and Vladyslav Kondus
- Subjects
Fluid Flow and Transfer Processes ,Process Chemistry and Technology ,energy efficiency ,centrifugal pump ,power consumption ,process innovation ,General Engineering ,General Materials Science ,Instrumentation ,Computer Science Applications - Abstract
Developing ways to increase centrifugal pumps’ pressure and power characteristics is a critical problem in up-to-date engineering. There are many ways to resolve it, but each has advantages and flaws. The presented article aimed to ensure higher energy efficiency indicators by using a counter-rotating pumping stage with trimming. During the research, the comprehensive approach was based on CFD modeling and the Moore–Penrose pseudoinverse approach for overestimated systems. According to the obtained data, pumps with a counter-rotating stage allowed the pressure head to be significantly increased compared with the standard design of the flow part. Notably, for pumping units CPS 180/1900 with a basic stage, the pressure head of 127 m was reached. However, when using a counter-rotating stage, the pressure head could be increased up to 270 m, which was 2.1 times higher. Therefore, to ensure unchanged characteristics when using centrifugal pumps with the counter-rotating stage, the weight and size indicators can be significantly reduced compared to the traditional design scheme. The proposed numerical and analytical approaches allow estimating the highest pressure and energy characteristics values.
- Published
- 2023
- Full Text
- View/download PDF
36. Machine Vision Systems for Collaborative Assembly Applications
- Author
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Vladyslav Andrusyshyn, Vitalii Ivanov, Ján Pitel’, Kamil Židek, and Peter Lazorik
- Published
- 2023
37. Surface Roughness Assessment After Milling of Pure and Carbon Black Reinforced Polypropylene Materials
- Author
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Ahmet Hakan Akin, Yusuf Furkan Yapan, Yaroslav Kusyj, Vitalii Ivanov, and Alper Uysal
- Published
- 2023
38. Parameter Identification of Cutting Forces in Crankshaft Grinding Using Artificial Neural Networks
- Author
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Ivan Pavlenko, Milan Saga, Ivan Kuric, Alexey Kotliar, Yevheniia Basova, Justyna Trojanowska, and Vitalii Ivanov
- Subjects
technological process ,intensification ,grinding parameters ,ANN model ,regression approach ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
The intensifying of the manufacturing process and increasing the efficiency of production planning of precise and non-rigid parts, mainly crankshafts, are the first-priority task in modern manufacturing. The use of various methods for controlling the cutting force under cylindrical infeed grinding and studying its impact on crankpin machining quality and accuracy can improve machining efficiency. The paper deals with developing a comprehensive scientific and methodological approach for determining the experimental dependence parameters’ quantitative values for cutting-force calculation in cylindrical infeed grinding. The main stages of creating a method for conducting a virtual experiment to determine the cutting force depending on the array of defining parameters obtained from experimental studies are outlined. It will make it possible to get recommendations for the formation of a valid route for crankpin machining. The research’s scientific novelty lies in the developed scientific and methodological approach for determining the cutting force, based on the integrated application of an artificial neural network (ANN) and multi-parametric quasi-linear regression analysis. In particular, on production conditions, the proposed method allows the rapid and accurate assessment of the technological parameters’ influence on the power characteristics for the cutting process. A numerical experiment was conducted to study the cutting force and evaluate its value’s primary indicators based on the proposed method. The study’s practical value lies in studying how to improve the grinding performance of the main bearing and connecting rod journals by intensifying cutting modes and optimizing the structure of machining cycles.
- Published
- 2020
- Full Text
- View/download PDF
39. The Mathematical Model for the Secondary Breakup of Dropping Liquid
- Author
-
Ivan Pavlenko, Vsevolod Sklabinskyi, Michał Doligalski, Marek Ochowiak, Marcin Mrugalski, Oleksandr Liaposhchenko, Maksym Skydanenko, Vitalii Ivanov, Sylwia Włodarczak, Szymon Woziwodzki, Izabela Kruszelnicka, Dobrochna Ginter-Kramarczyk, Radosław Olszewski, and Bernard Michałek
- Subjects
oscillatory wall ,vibrational impact ,Weber number ,critical value ,nonstable droplet ,Technology - Abstract
Investigating characteristics for the secondary breakup of dropping liquid is a fundamental scientific and practical problem in multiphase flow. For its solving, it is necessary to consider the features of both the main hydrodynamic and secondary processes during spray granulation and vibration separation of heterogeneous systems. A significant difficulty in modeling the secondary breakup process is that in most technological processes, the breakup of droplets and bubbles occurs through the simultaneous action of several dispersion mechanisms. In this case, the existing mathematical models based on criterion equations do not allow establishing the change over time of the process’s main characteristics. Therefore, the present article aims to solve an urgent scientific and practical problem of studying the nonstationary process of the secondary breakup of liquid droplets under the condition of the vibrational impact of oscillatory elements. Methods of mathematical modeling were used to achieve this goal. This modeling allows obtaining analytical expressions to describe the breakup characteristics. As a result of modeling, the droplet size’s critical value was evaluated depending on the oscillation frequency. Additionally, the analytical expression for the critical frequency was obtained. The proposed methodology was derived for a range of droplet diameters of 1.6–2.6 mm. The critical value of the diameter for unstable droplets was also determined, and the dependence for breakup time was established. Notably, for the critical diameter in a range of 1.90–2.05 mm, the breakup time was about 0.017 s. The reliability of the proposed methodology was confirmed experimentally by the dependencies between the Ohnesorge and Reynolds numbers for different prilling process modes.
- Published
- 2020
- Full Text
- View/download PDF
40. Parameter identification of a discrete-mass mathematical model of crankshaft oscillations
- Author
-
Ivan Pavlenko, Ivan Kuric, Yevheniia Basova, Milan Saga, Vitalii Ivanov, Alexey Kotliar, and Justyna Trojanowska
- Subjects
Mechanical Engineering ,Applied Mathematics ,Automotive Engineering ,General Engineering ,Aerospace Engineering ,Industrial and Manufacturing Engineering - Published
- 2022
41. Vapor Overproduction Condition Monitoring in a Liquid–Vapor Ejector
- Author
-
Serhii Sharapov, Jana Mižáková, Danylo Husiev, Vitalii Panchenko, Vitalii Ivanov, Ivan Pavlenko, and Kamil Židek
- Subjects
Process Chemistry and Technology ,Chemical Engineering (miscellaneous) ,Bioengineering ,liquid–vapor ejector ,degree of vapor overproduction ,experimental study ,interchangeable geometry ,energy efficiency ,vacuum unit - Abstract
We consider the influence of vapor content in the mixed flow leaving a liquid-vapor ejector on the energy efficiency of a vacuum unit. As shown by numerical studies of liquid-vapor ejectors, this issue is important as vapor overproduction, which accompanies the process of secondary flow ejection, directly impacts the efficiency of the working process of both the liquid-vapor ejector and the vacuum unit as a whole. The greater the degree of vapor overproduction, the greater the load on the vapor phase of the separator, which is part of the vacuum unit. In addition, the liquid phase must be returned to the cycle to ensure the constancy of the mass flow rate of the working fluid of the primary flow. Our numerical study results revealed the rational value of the degree of vapor overproduction at which the efficiency of the liquid–vapor ejector was maximized, and the amount of additional working fluid that needed to enter the cycle of the vacuum unit was minimal. Experimental condition monitoring studies on the liquid–vapor ejector were carried out on plane-parallel transparent models with different flow path geometries. Through experimental studies, we confirmed and adjusted the values of the achievable efficiency of the working process of a liquid–vapor ejector, depending on the degree of vapor overproduction. Using a comparative analysis of liquid–vapor ejectors with different flow path geometries, differences were revealed in their working processes, which consisted of the degree of completion of the mixing of the working media of primary and secondary flows. To determine the feasibility of using liquid–vapor ejectors with different flow path geometries, exergy analysis was performed, resulting in achievable efficiency indicators.
- Published
- 2022
- Full Text
- View/download PDF
42. Three-Dimensional Mathematical Model of the Liquid Film Downflow on a Vertical Surface
- Author
-
Ivan Pavlenko, Oleksandr Liaposhchenko, Marek Ochowiak, Radosław Olszewski, Maryna Demianenko, Oleksandr Starynskyi, Vitalii Ivanov, Vitalii Yanovych, Sylwia Włodarczak, and Michał Doligalski
- Subjects
separation layer ,gas–liquid ,interfacial surface ,velocity field ,dimensionless parameters ,Technology - Abstract
Film downflow from captured liquid without wave formation and its destruction is one of the most important aspects in the development of separation equipment. Consequently, it is necessary to create well-organized liquid draining in areas of captured liquid. Thus, the proposed 3D mathematical model of film downflow allows for the determination of the hydrodynamic parameters of the liquid film flow and the interfacial surface. As a result, it was discovered that the interfacial surface depends on the proposed dimensionless criterion, which includes internal friction stress, channel length, and fluid density. Additionally, equations for determining the averaged film thickness, the averaged velocity vectors over the film thickness, the longitudinal and vertical velocity components, and the initial angle of streamline deviation from the vertical axis were analytically obtained.
- Published
- 2020
- Full Text
- View/download PDF
43. Fundamental Approach for Analysis of Dynamic Characteristics of Fixtures
- Author
-
Vitalii Ivanov and Ivan Pavlenko
- Subjects
functional element ,stiffness ,free oscillations ,eigenfrequency ,forced oscillations ,cutting force ,amplitude-frequency response. ,Computer engineering. Computer hardware ,TK7885-7895 ,Systems engineering ,TA168 - Abstract
Present work is aimed at research of locating and clamping process of prismatic parts in fixtures during the machining on drilling-milling-boring machines. The fundamental approach for developing mathematical modeling of the system “fixture – workpiece” has been proposed. It allows to determine critical frequencies of functional elements oscillations and amplitude-frequency response characteristics, as well as dynamic component of fixture deformations at operating frequency of the machining process. The developed mathematical model is evaluated by numerical calculations of spectrum of critical frequencies considering the stiffness of cutting tool. The further researches are directed on the development of the methodology of calculation of the system “fixture – workpiece” by computer means of numerous realization and development of practical recommendations regarding its use during fixture design.
- Published
- 2018
- Full Text
- View/download PDF
44. Flexible Fixtures for CNC Machining Centers in Multiproduct Manufacturing
- Author
-
Vitalii Ivanov and Jozef Zajac
- Subjects
modular design ,cnc equipment ,flexibility ,experimental research ,production planning ,machining ,efficiency ,automotive industry. ,Computer engineering. Computer hardware ,TK7885-7895 ,Systems engineering ,TA168 - Abstract
In modern manufacturing engineering, a major challenge is the contradiction between the need to reduce the time required to design and manufacture the products and the increasing complexity of product design. Today's market requires more varieties of products, and consequently the equipment and processes should be more flexible. Fixtures play an essential role in production of high-quality and competitive products in multiproduct manufacturing. The paper describes the ways of increasing of machining efficiency of parts. The principally new constructions of functional modules of modularadjustable fixtures for locating and clamping of workpieces are introduced. Use of the proposed fixtures with the possibility of automatized adjustment ensures the spreading of technological capabilities of CNC metal-cutting equipment, decreasing of preparatory time and setup time, and therefore, assists improving of the efficiency of production planning.
- Published
- 2018
- Full Text
- View/download PDF
45. The Efficiency of Dynamic Vibration Dampers for Fine Finishing Boring
- Author
-
Alexandr Orgiyan, Vitalii Ivanov, Volodymyr Tonkonogyi, Anna Balaniuk, and Vasyl Kolesnik
- Published
- 2022
46. Mathematical Modeling as a Tool for Selecting a Rational Logistical Route in Multimodal Transport Systems
- Author
-
Olexiy Pavlenko, Dmitriy Muzylyov, Natalya Shramenko, Dagmar Cagáňová, and Vitalii Ivanov
- Published
- 2022
47. Using Regression Analysis for Automated Material Selection in Smart Manufacturing
- Author
-
Vitalii Kolos, Ján Piteľ, Kristina Berladir, Ivan Pavlenko, Vitalii Ivanov, Justyna Trojanowska, and Jana Mižáková
- Subjects
phase composition ,predictive maintenance ,mechanical properties ,process innovation ,decision-making approach ,industrial growth ,General Mathematics ,Computer Science (miscellaneous) ,Engineering (miscellaneous) - Abstract
In intelligent manufacturing, the phase content and physical and mechanical properties of construction materials can vary due to different suppliers of blanks manufacturers. Therefore, evaluating the composition and properties for implementing a decision-making approach in material selection using up-to-date software is a topical problem in smart manufacturing. Therefore, the article aims to develop a comprehensive automated material selection approach. The proposed method is based on the comprehensive use of normalization and probability approaches and the linear regression procedure formulated in a matrix form. As a result of the study, analytical dependencies for automated material selection were developed. Based on the hypotheses about the impact of the phase composition on physical and mechanical properties, the proposed approach was proven qualitatively and quantitively for carbon steels from AISI 1010 to AISI 1060. The achieved results allowed evaluating the phase composition and physical properties for an arbitrary material from a particular group by its mechanical properties. Overall, an automated material selection approach based on decision-making criteria is helpful for mechanical engineering, smart manufacturing, and industrial engineering purposes.
- Published
- 2022
- Full Text
- View/download PDF
48. Composition, Structure, and Properties of Ti, Al, Cr, N, C Multilayer Coatings on AISI W1-7 Alloyed Tool Steel
- Author
-
Tetiana Loskutova, Michal Hatala, Inna Pogrebova, Natalya Nikitina, Maryna Bobina, Svetlana Radchenko, Nadiia Kharchenko, Serhii Kotlyar, Ivan Pavlenko, and Vitalii Ivanov
- Subjects
titanium carbide ,titanium nitride ,chromium carbides ,diffusion ,barrier layer ,heat resistance ,wear resistance ,coefficient of friction ,industrial growth ,process innovation ,Surfaces and Interfaces ,Surfaces, Coatings and Films ,Materials Chemistry - Abstract
New methods of diffusion metallization of AISI W1-7 steel have been developed. The paper proposes a comparative analysis of the properties and characteristics of AISI W1-7 steel after three methods of chemical heat treatment: diffusion nitriding, nitrogen titration by physical deposition from the gas phase, and diffusion chromium plating with subsequent titanium alloys. The results are presented as a comprehensive analysis of coatings: metallographic, micro-X-ray spectral, X-ray phase, durometric, heat resistance, and wear resistance. It is established that multilayer protective coatings are formed as a result of treatments. It is shown that the coatings consist of carbide and nitride zones, intermetallic, and an Al2O3 layer outside the coating. The coatings have been found to contain barrier layers that prevent aluminum from penetrating the substrate. The maximum microhardness is typical for layers based on titanium carbide—30.3–35.5 GPa and titanium nitride—22.0–22.6 GPa, heat-resistant steels AISI W1-7 at a temperature of 900 °C in 4.2–8.5 times and wear resistance under sliding friction without lubrication up to 5.4 times compared to samples without treatment.
- Published
- 2022
- Full Text
- View/download PDF
49. Impact of Nitrocarburizing on Hardening of Reciprocating Compressor’s Valves
- Author
-
Kristina Berladir, Michal Hatala, Tetiana Hovorun, Ivan Pavlenko, Vitalii Ivanov, Frantisek Botko, and Oleksandr Gusak
- Subjects
corrosion-resistant steel ,fungi ,technology, industry, and agriculture ,Surfaces and Interfaces ,flow valve ,chemical–thermal treatment ,energy efficiency ,nitrocarburizing ,reciprocating compressor ,industrial innovation ,predictive maintenance ,fatigue stress ,Surfaces, Coatings and Films ,Materials Chemistry - Abstract
One of the urgent problems in reciprocating machinery is ensuring the functional properties of direct-flow valves. Coatings of these parts should increase energy efficiency, reduce compressed gas temperature, and increase compressor performance. In this article, the effect of nitrocarburizing in pastes on increasing the performance and resource of such valves was studied. The primary research methods were metallographic and electron-metallographic research of the surface layer structure of steel 60Si2Cr. Comparison with similar characteristics obtained for stainless steel 09Cr15Ni8Al was also performed. As a result, it was determined that nitrocarburizing of carbon spring steel 60Si2Cr leads to a greater depth of the diffusion layer than nitrocarburizing of alloyed chromium-nickel steel 09Cr15Ni8Al. Simultaneously, the diffusion layers of both types of steel are almost the same. Simultaneously, the increase in the endurance limit of 60Si2Cr steel during nitrocarburizing is about 1.3 times compared to untreated material. Finally, the predictive maintenance showed that the evaluated lifetime of nitrocarburized valves increases by 5.7 times compared with untreated valves.
- Published
- 2022
- Full Text
- View/download PDF
50. Ensuring economic efficiency of flexible fixtures in multiproduct manufacturing
- Author
-
Yuliia Denysenko, Ivan Pavlenko, Oleksandr Oleksandrovych Liaposhchenko, and Vitalii Ivanov
- Subjects
Multiaxis machining ,Economic efficiency ,0209 industrial biotechnology ,business.product_category ,Computer science ,Process (engineering) ,Strategy and Management ,flexible manufacturing ,02 engineering and technology ,Fixture ,Industrial and Manufacturing Engineering ,Management Information Systems ,multiaxis machining ,cost of machining ,020901 industrial engineering & automation ,Machining ,Management of Technology and Innovation ,0502 economics and business ,fixture design ,TS155-194 ,Cutting tool ,05 social sciences ,Manufacturing engineering ,Machine tool ,Production planning ,Production management. Operations management ,business ,050203 business & management - Abstract
The first-priority directions for modern engineering, especially for multiproduct manufacturing, include the intensification of manufacturing processes, increasing the efficiency of technological equipment, and reducing the time required to implement technological solutions. Fixture design is a complicated and time-consuming process that requires considering many parameters of the closed-loop technological system “machine tool — fixture — cutting tool — workpiece”. One machined part can have several fixture layouts corresponding to all specified parameters; however, their effectiveness differs depending on production conditions. Search for an optimal fixture for specified production conditions is an essential stage of production planning. It has been proved that the efficiency of a manufacturing process should be assessed using single economic indicator — the cost of machining, which considers the costs of time, the total costs for process realisation, and a batch of parts. The paper aims to substantiate the efficiency of manufacturing processes in machining complex parts using flexible fixtures by developing a mathematical model that considers the cost of time, the cost of implementing the manufacturing process, and the batch value of parts production. This approach estimates the efficiency of manufacturing processes for machining complex parts and choosing the flexible fixture layout that corresponds to specific production conditions. It was proved that flexible fixtures could be effectively used for machining small batches of parts with frequent readjustments to new workpieces and short-term machining. A tendency has been established that the higher number of nomenclature of parts contributes to expanding the scope of the effective use of flexible fixtures.
- Published
- 2021
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