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Документ Plasma acceleration in the atmosphere by pulsed inductive thruster(Національний технічний університет "Харківський політехнічний інститут", 2024) Korytchenko, K. V.; Bolyukh, V. F.; Buriakovskyi, S. G.; Kashansky, Y. V.; Kocherga, O. I.One of the directions of development of plasma technologies consists in the formation of gas-metal plasma formations and throwing them to a certain distance. Known thrusters of plasma formation either have an electrode system that is prone to erosion, or a discharge system in a solid dielectric substance in which ablation occurs, or a complex gas-dynamic system with fuel supply. They do not provide acceleration of plasma formation in the atmosphere for a significant distance. Purpose. A theoretical and experimental study of electromechanical and thermophysical processes in a plasma thruster, which ensures the formation of a plasma formation due to thermal ionization by an induced current in a thin conductor layer during a high-voltage discharge on an inductor and the accelerating of a plasma formation in the atmosphere for a significant distance. Methodology. The proposed concept of a plasma thruster, in which the inductor inductively interacts with a combined armature, which includes an aluminum armature in the form of a thin (0.5-1 μm) foil, a copper armature made of a thicker foil (35-50 μm).On the basis of a mathematical model that takes into account the uneven distribution of currents in the inductor and conductive armatures, the features of the process of acceleration the combined armature in the atmosphere were established and experimental studies were carried out. Results. The electromechanical and thermal characteristics of the plasma thruster were calculated. It was established that the choice of the thickness of the dielectric layer of the armature, to which the aluminum and copper armatures are attached, is determined by the energy balance between the heating temperature of the aluminum armature and the electromechanical indicators of the thrower. Scientific novelty. It was experimentally established that the greatest density and homogeneity is observed in the middle of the plasma formation, which has the shape of a torus, moving away from the dielectric sheet on which the aluminum armature was located. As the voltage of the capacitive energy storage increases, the induced current density in the armature increases and the plasma formation becomes more uniform. Practical value. In comparison with the experimental results, the calculated current in the inductor coincides both in shape and in magnitude with an accuracy of 7 %. The biggest difference between the calculated and experimental currents of the inductor occurs when the aluminum armature is thermally destroyed. The transition of an aluminum armature into a plasma formation depends significantly on the voltage of the capacitive energy storage.Документ The method for design of electromagnetic hybrid active-passive shielding by overhead power lines magnetic field(Національний технічний університет "Харківський політехнічний інститут", 2024) Kuznetsov, B. I.; Nikitina, Nikitina; Bovdui, I. V.; Chunikhin, K. V.; Kolomiets, V. V.; Kobylianskyi, B. B.Development of the method for designing electromagnetic hybrid active-passive shield, consisting from active and multy-circuit passive parts, which is characterized by increased effectiveness of reducing the industrial frequency magnetic field created by twocircuit overhead power lines in residential buildings. Methodology. The designing problem of electromagnetic hybrid active-passive shield including robust system of active shielding and multy circuit passive shield of initial magnetic field comes down to a solution of the multy-criteria two-player zero-sum antagonistic game. The game payoff vector calculated based on the finite element calculations system COMSOL Muliphysics. The game solution calculated based on the particles multyswarm optimization algorithms. Results. During the design of the electromagnetic hybrid active-passive shield the coordinates of the spatial arrangement of 11 circuits passive shield and the coordinates of the spatial location of one compensation winding, as well as the current and phase in this winding of the active shielding system are calculated. The results of theoretical and experimental studies of hybrid active and multy-circuit passive shield by magnetic field in residential building from two-circuit power transmission line with a «Barrel» type arrangement of wires presented. Originality. For the first time the method for designing hybrid active and multycircuit passive shield, consisting from active and multy-circuit passive parts, which is characterized by increased effectiveness of reducing the magnetic field of industrial frequency created by two-circuit overhead power lines in residential buildings is developed. Practical value. Based on results of calculated study the shielding efficiency of the initial magnetic field what is confirmed by experimental studies determined that shielding factors whith only multy-circuit passive shield is more 1.2 units, whith only active shield is more 4 units and with electromagnetic hybrid active-passive shield is more 6.2 units. It is shown the possibility to reduce the level of magnetic field induction in residential building from two-circuit power transmission line with a «Barrel» type arrangement of wires by means of electromagnetic hybrid active shielding with single compensating winding and multy-circuit passive shielding with 11 circuit passive shield to 0.5 μT level safe for the population.Документ The method for design of combined electromagnetic shield for overhead power lines magnetic field(Національний технічний університет "Харківський політехнічний інститут", 2024) Kuznetsov, B. I.; Nikitina, T. B.; Bovdui, I. V.; Chunikhin, K. V.; Kolomiets, V. V.; Kobylianskyi, B. B.Aim. Development of the method of designing a combined electromagnetic shield, consisting of active and passive parts, to improve the effectiveness of reduction of industrial frequency magnetic field created by two-circuit overhead power lines in residential buildings. Methodology. The problem of design of combined electromagnetic shield including robust system of active shielding and electromagnetic passive shield of initial magnetic field solved based on of the multi-criteria two-player antagonistic game. The game payoff vector calculated based on the finite element calculations system COMSOL Muliphysics. The game solution calculated based on the particles multiswarm optimization algorithms. During the design of combined electromagnetic shields spatial location coordinates of shielding winding, the currents and phases in the shielding winding of active shielding, geometric dimensions and thickness of the electromagnetic passive shield are calculated. Results. The results of theoretical and experimental studies of combined electromagnetic passive and active shielding of magnetic field in residential building from power transmission line with a "Barrel" type arrangement of wires presented. Originality. For the first time the method of designing a combined electromagnetic shield, consisting of active and passive parts, for more effective reduction of the magnetic field of industrial frequency created by two-circuit overhead power lines in residential buildings is developed. Practical value. Based on results of calculated and experimental study the shielding efficiency of the initial magnetic field determined that shielding factors whith only electromagnetic passive shield is more 2 units, whith only active shield is more 4 units and with combined electromagnetic passive and active shield is more 10 units. It is shown the possibility to reduce the level of magnetic field induction in residential building from power transmission line with a "Barrel" type arrangement of wires by means of a combined electromagnetic passive and active shielding with single compensating winding to 0.5 μT level safe for the population.Документ Efficiency of multi-armature linear pulse electromechanical power and speed converters(Національний технічний університет "Харківський політехнічний інститут", 2024) Bolyukh, V. F.; Kocherga, O. I.Introduction. High-speed linear pulse electromechanical converters (LPEC) provide acceleration of the executive element in a short active section to high speed with significant displacement, while power-purpose LPECs create powerful power impulses of the executive element on the object of influence with minor movements. One of the areas of improvement of LPEC is the creation of multi-armature structures. Methodology. To analyze the electromechanical characteristics and indicators of LPEC, a mathematical model was used, which takes into account the interconnected electrical, magnetic, mechanical and thermal processes that occur when connected to a pulse energy source with a capacitive energy storage. The main results of the calculations were performed in the COMSOL Multiphysics software environment and confirmed by experimental studies in laboratory conditions. Results. The features of the electromechanical processes of multi-armature LPECs are established and their indicators are determined. With the help of efficiency criteria, which take into account electrical, power, speed and magnetic indicators in a relative form with different options for their evaluation strategy, it was established that multi-armature LPECs for power purposes have increased efficiency, and for high-speed LPECs the use of multiarmature configurations is impractical. The conducted experimental studies confirm the reliability of the calculated results. Originality. It has been established that almost all multi-armature LPECs for power purposes have higher efficiency compared to a converter with one armature, and for high-speed LPECs it is advisable to use traditional LPECs with one armature. Practical value. On the basis of multi-armature LPECs, models of an electromagnetic UAV catapult, a magnetic pulse press for ceramic powder materials, an electromechanical device for dumping ice and snow deposits from a power line wire, a device for destroying information on a solid-state digital SSD drive have been developed and tested.Документ Method for design of two-level system of active shielding of power frequency magnetic field based on a quasi-static model(Національний технічний університет "Харківський політехнічний інститут", 2024) Kuznetsov, B. I.; Kutsenko, A. S.; Nikitina, T. B.; Bovdui, I. V.; Kolomiets, V. V.; Kobylianskyi, B. B.Development of method for design a two-level active shielding system for an industrial frequency magnetic field based on a quasistatic model of a magnetic field generated by power line wires and compensating windings of an active shielding system, including coarse open and precise closed control. Methodology. At the first level rough control of the magnetic field in open-loop form is carried out based on a quasi-static model of a magnetic field generated by power line wires and compensating windings of an active shielding system. This design calculated based on the finite element calculations system COMSOL Multiphysics. At the second level, a stabilizing accurate control of the magnetic field is implemented in the form of a dynamic closed system containing, in addition plant, also power amplifiers and measuring devices of the system. This design calculated based on the calculations system MATLAB. Results. The results of theoretical and experimental studies of optimal two-level active shielding system of magnetic field in residential building from power transmission line with a «Barrel» type arrangement of wires by means of active canceling with single compensating winding are presented. Originality. For the first time, the method for design a two-level active shielding system for an power frequency magnetic field based on a quasi-static model of a magnetic field generated by power line wires and compensating windings of an active shielding system, including coarse open and precise closed control is developed. Practical value. It is shown the possibility to reduce the level of magnetic field induction in residential building from power transmission line with a «Barrel» type arrangement of wires by means of active canceling with single compensating winding with initial induction of 3.5 µT to a safe level for the population adopted in Europe with an induction of 0.5 µTПублікація Електромеханічні та теплофізичні процеси в імпульсному індукційному прискорювачі плазмового утворення(Національний технічний університет "Харківський політехнічний інститут", 2023) Коритченко, Костянтин Володимирович; Болюх, Володимир Федорович; Буряковський, Сергій Геннадійович; Кашанський, Юрій Володимирович; Кочерга, Олександр ІвановичРоботи по створенню та метанню плазмових утворень різними способами ведуться в провідних наукових центрах світу. Досягнуто формування плазмового утворення тривалістю декілька мілісекунд та його метання у відкритому атмосферному середовищі на відстань 0,5-0,6 м. Для створення плазми використовують енергію первинного розрядного кола з подальшим прискоренням газоплазмового утворення за допомогою енергії вторинного кола. Плазмове утворення отримують і за рахунок електричного вибуху провідника. Метою статті є теоретичне та експериментальне дослідження електромеханічних та теплофізичних процесів в імпульсному індукційному прискорювачі, який забезпечує формування плазмового утворення за рахунок термічної іонізації в результаті електричного вибуху провідника та метання його у атмосферному середовищі відносно індуктора. Методика. Для аналізу електромеханічних та теплофізичних процесів в імпульсному індукційному прискорювачі плазмового утворення (ІІПП) розроблена і реалізована в програмному пакеті Сomsol Multiphysics математична модель прискорювача, в якій якір не змінює своєї форми і агрегатного стану в процесі роботи та враховує розподілені у просторі параметри. Результати. Розраховані електромеханічні і теплові характеристики прискорювача. Показано, що перевищення температури в якорі, що виконаний у вигляді алюмінієвої фольги, суттєво нерівномірно. Максимальне значення температури має місце в середній частині фольги ближче до зовнішнього краю, причому ця температура значно перевищує температуру кипіння алюмінію. Наукова новизна. Проведені експериментальні дослідження ІІПП, у якого якір виконаний з алюмінієвої та мідної фольги, а індуктор, що підключається до високовольтного ємнісного накопичувача енергії, виконаний у вигляді плоскої дискової спіралі. В процесі роботи ІІПП якір переходить в плазмовий стан і переміщується вертикально вверх, перетворюючись в об’ємний комок, або на скупчення маленьких частинок, які здіймались на декілька метрів відносно індуктора. Експериментально показано характерний круговий контур термічного нагрівання мідноїфольги якоря, яка закріплена на листі склотекстоліту. Практична цінність. Результати експериментальних досліджень з точністю до 15 % співпадають з розрахунковими і показують справедливість концепції ІІПП, в якому за рахунок високої густини індукованого струму в якорі відбувається термічна іонізація в результаті електричного вибуху провідника з переходом його в плазмовий стан. Взаємодія плазмового утворення з магнітним полем індуктора призводить до появи електродинамічної сили, яка забезпечує його переміщення у відкритому атмосферному середовищі на декілька метрів.Документ Optimization of spatial arrangement of magnetic field sensors of closed loop system of overhead power lines magnetic field active silencing(Національний технічний університет "Харківський політехнічний інститут", 2023) Kuznetsov, B. I.; Nikitina, T. B.; Bovdui, I. V.; Voloshko, O. V.; Kolomiets, V. V.; Kobylianskyi, B. B.Development of a method for optimization of spatial arrangement and angular position of magnetic field sensors of a closed system to ensure maximum efficiency of active silencing canceling of the magnetic field generated by overhead power lines. Methodology. Spatial arrangement and angular position of magnetic field sensors of closed loop system of overhead power lines magnetic field active silencing determined based on binary preference relations of local objective for multi-objective minimax optimization problem, in whith the vector objective function calculated based on Biot–Savart law. The solution of this vector minimax optimization problem calculated based on nonlinear Archimedes algorithm of multi-swarm multi-agent optimization. Results. Results of simulation and experimental research of optimal spatial arrangement and angular position of magnetic field sensors of a closed system to ensure maximum efficiency of active silencing of the magnetic field generated by overhead power lines with a barrel-type arrangement of wires. Originality. The method for optimization of spatial arrangement and angular position of magnetic field sensors of a closed system to ensure maximum efficiency of active shielding of the magnetic field generated by overhead power lines is developed. Practical value. An important practical problem optimization of spatial arrangement and angular position of magnetic field sensors of a closed system to ensure maximum efficiency of active silencing of the magnetic field generated by overhead power lines has been solved.Документ The method of multi-objective parametric design of magnetic field active canceling robust system for residential multy-story buildings closed to double-circuit overhead power lines(Національний технічний університет "Харківський політехнічний інститут", 2023) Kuznetsov, B. I.; Nikitina, T. B.; Bovdui, I. V.; Voloshko, O. V.; Kolomiets, V. V.; Kobylianskyi, B. B.Aim. Development the method of multi-objective parametric design for robust system of active canceling of magnetic field based on binary preference relations of local objective for multi-objective minimax optimization problem. Methodology. Spatial location coordinates of the compensating winding and the current in the shielding winding were determined during the preference-based multi-objective parametric design of systems of active canceling based on solution of the vector minimax optimization, in whith the vector objective function calculated based on Biot-Savart's law. The solution of this vector minimax optimization problem calculated based on nonlinear Archimedes algorithm. Components of Jacobi matrix and Hesse matrix calculated based on multi-swarm multi-agent optimization. Results. Theoretically and experimentally confirmed the effectiveness of reducing the level of the magnetic field in residential multy-storey old building of a doublecircuit overhead power transmission lines with a barrel-type arrangement of wires by means of active shielding with two compensation winding. Originality. The method of multi-objective parametric design for robust system of active canceling of magnetic field based on binary preference relations of local objective for multi-objective minimax optimization problem is developed. Practical value. It is shown the possibility to reduce the level of magnetic field in residential multy-storey old building closed to double-circuit overhead power transmission lines with a barrel-type arrangement of wires by means of system of active canceling with two canceling winding to a level safe for the population with an induction of 0.5 μT.Документ Synthesis of an effective system of active shielding of the magnetic field of a power transmission line with a horizontal arrangement of wires using a single compensation winding(Національний технічний університет "Харківський політехнічний інститут", 2022) Kuznetsov, B. I.; Nikitina, T. B.; Bovdui, I. V.; Voloshko, O. V.; Kolomiets, V. V.; Kobylianskyi, B. B.Aim. The theoretical and experimental studies of the effectiveness of reducing the level of the magnetic field in two-storey cottage of the old building of a power transmission line with a horizontal arrangement of wires by means of active shielding with single compensation winding. Methodology Spatial location coordinates of the compensating winding and the current in the shielding winding were determined during the design of systems of active screening based on solution of the vector game, in whith the vector payoffs is calculated based on Biot-Savart's law. The solution of this vector game calculated based on algorithms of multi-swarm multi-agent optimization. Results The results of theoretical and experimental studies of the effectiveness of reducing the level of the magnetic field in two-storey cottage of the old building of a power transmission line with a horizontal arrangement of wires by means of active shielding with single compensation winding are presented. Originality. For the first time, the theoretical and experimental studies of the effectiveness of reducing the level of the magnetic field in two-storey cottage of the old building of a power transmission line with a horizontal arrangement of wires by means of active shielding with single compensation winding are considered. Practical value. From the point of view of the practical implementation it is shown the possibility to reduce the level of magnetic field in two-storey cottage of the old building from power transmission line with a horizontal arrangement of wires by means of active shielding with single compensation winding to the sanitary standards of Ukraine.Документ The method of multi objective synthesis of stochastic robust control by multimass electromechanical systems under non-gausian random external disturbances(Національний технічний університет "Харківський політехнічний інститут", 2022) Kuznetsov, B. I.; Nikitina, T. B.; Bovdui, I. V.; Voloshko, O. V.; Kolomiets, V. V.; Kobylianskyi, B. B.Development of the method of multi objective synthesis of stochastic robust control by multimass electromechanical systems to satisfy various requirements for the operation of such systems in various modes under non-gausian random external disturbances. Methodology. The problem of multi objective synthesis of stochastic robust control by multimass electromechanical systems to satisfy various requirements for the operation of such systems in various modes under non-gausian random external disturbances solved based on the choosing of weight matrices in the robust control goal vector.The calculation of the target vector is performed based on the solution of the zero-sum vector antagonistic game. The components of the game payoff vector are variable quality indicators that are applied to the system operation in various modes. The calculation of the components of payoff vector game are performed based on the simulation of the initial system closed by the synthesized stochastic controllers in various operating modes and under various external influences and variations in the parameters of the uncertainty of the initial plant. Results. The results of multi objective synthesis of stochastic robust twomass electromechanical servo systems modes under non-gausian random external disturbances in which differences requirements for the operation of such systems in various modes were satisfied are given. Based on the results of modeling and experimental studies it is established, that with the help of synthesized robust nonlinear controllers, it is possible to improve of quality indicators of two-mass electromechanical servo system in comparison with the system with standard regulators. Originality. For the first time the method of multi objective synthesis of stochastic robust control by multimass electromechanical systems to satisfy various requirements for the operation of multimass systems in various modes is developed. Practical value. From the point of view of the practical implementation the possibility of solving the problem of multi objective synthesis of stochastic robust control systems to satisfy various requirements for the operation of multimass electromechanical systems in various modes is shown.