Механіко-енергетичний факультет
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Item An Adaptive Prediction of Aircraft Motion with the Elements of Virtual Reality(Electronics and Control Systems, N 3(53) – Kyiv: NAU, 2017. – pp. 39–45., 2017) Tovkach, S.S.; Romanovska, A.A.The problem of adaptive method for predicting the aircraft state, which, by the dynamics control of the object, allows to reduce the load on the distributed network of virtual reality (with data consistency), while improving the accuracy of prediction the objects state, has been considered. The high-level protocol interaction approach let to organize interprocess communication network at a higher logical level, with less network loading, by supporting variable-length messaging and built-in mechanism the data replication control based on the principle “the election of consistency”. Method develops to reach better the prediction of the object rotation and trajectory motion correction of the aircraftItem Approaches to development the system for control of quality and combustion of biofuels(National Aviation University, 2018-04) Zaporozhets, Artur; Ivanov, Serhii; Serhiienko, RomanIn this article the methods and facilities of the system of quality and combustion of various types of fuel are considered. The device for measuring the heat capacity and evaporation heat of moisture and organic liquids from inhomogeneous materials is considered, which is realized by the method of synchronous thermal analysis. The methods and facilities of control of burning process of fuel with using oxygen sensors are showed.Item Arched transmissions teeth geometry within offset of initial profile(Національний авіаційний університет, 2019-10) Nosko, Pavlo; Носко, Павло; Bashta, Oleksandr; Башта, Олександр; Lysenko, Аndrii; Лисенко, Андрій; Tkach, Pavlo; Ткач, Павло; Bashta, Alla; Башта, АллаThere has been researched teeth geometry of cylindrical arched teeth gears, cut with rod instrument, teeth of which profiled by arbitrary curve in normal cross-section and in linear direction within initial profile offset. Toothing of instrumental rod with arched teeth with gears within initial profile offset is an analogue of the process of cutting teeth with rod instrument by means of enveloping. Surfaces of gear teeth within toothing with rod are enveloping of teeth surfaces of the last one. If teeth surfaces of instrumental rods for cutting pinion teeth and gear are non-congruous, then we have case of dotty toothing of pinion and gear. If initial profiles are non-congruous, then contact dot moves from one side of the tooth to another. It was obtained equations of teeth surfaces, while writing down coordinates of toothing surfaces in coordinate systems X1Y1Z1 and X2Y2Z2, connected with pinion and gear. While making such a transition, we have equations of surfaces of convex side of pinion teeth and concave side of gear teeth. In common case those equations are equations of helical lines of variable pitch. These equations can be used within the determination of toothing field borders, appropriate to the tops of the pinion and the gear teeth. Within this case two types of toothed gears with arched teeth will differ: gears with symmetric arched teeth (teeth are symmetric relatively to the plane XOZ and asymmetric arched teeth (working area of teeth surface is situated from one side of plane). Received results can be used within the determination of indices of loading ability and other characteristics of cylindrical arched transmissions with generalized teeth geometry within initial profile offset.Item Automated identification system baseds on the changing of the temperature field of aircraft elements(National Aviation University, 2013) Шевчук, Д.О.In this article, system of identification collisions (structural damage) in the air, based on the change of the temperature field was given. Identification system provides information about type and size of aircraft damage to all systems during recovering the controllability of the aircraft when an unexpected problem occurs during a flight is proposedItem Automation and remote control of lighting airfields systems modern civil aviation(Aviation in the XXI-st century. Safety in aviation and space technologies: the seventh world congress, 19-21 of september 2016: abstracts. – K., 2016. – V.1. – P. 1.1.7-1.1.9., 2016) Ilyenko, S.SOne way to increase the level of safety of civil aviation aircraft is automation lighting airfields systems. Automation is provided by remote control lighting equipment to obtain the required warning about the system and its individual elements according to international specifications and technical documentation to the type of equipment.Item Change in the entropy during a first-order phase transition induced by a magnetic field in an isotropic non-Heisenberg ferromagnet(AIP Publishing, Low Temperature Physics 44, 322 (2018), 2018-04) Лаванов, Геннадій ЮрійовичWe describe a first-order phase transition in an isotropic non-Heisenberg ferromagnet induced by a magnetic field with a fourth-order spin exchange interaction at temperatures above the Curie point. The field behavior of the magnetization is analyzed and the temperature dependences of the critical fields of the stability of the paramagnetic and ferromagnetic phases as well as the critical field of the phase transition between them are determined. It is shown that this first-order phase transition has a finite amplitude of the magnetization jump and can occur in small magnetic fields. An H–T phase diagram is presented. It is found that the amplitude of the phase jump during the magnetic field-induced transition from the paramagnetic to the ferromagnetic phase can exceed the magnitude of the entropy change of an isotropic Heisenberg ferromagnet by two orders of magnitude when it is magnetized at the Curie point. It is shown that the expansion of the free energy model up to the 6th power in magnetization can only qualitatively describe the entropy behavior in the phase transition between the paramagnetic and ferromagnetic phases.Item Comparison of sinusoidal and involute spur gears by meshing characteristics(Одеський політехнічний університет, 2019) Ткач, Павло Миколайович; Носко, Павло Леонідович; Башта, Олександр Васильович; Цибрій, Юрій Олександрович; Ревякіна, Ольга Олександрівна; Бойко, Григорій ОлексійовичСтаття присвячена актуальному завданню створення зачеплень, які є альтернативними до евольвентного (традиційного), та можуть бути застосовані в силових приводах машин. Найпоширенішою вимогою до альтернативних видів зачеплень є більша у порівнянні з традиційним навантажувальна здатність та довговічність. Для забезпечення зазначеної вимоги може бути використано синусоїдальне зачеплення. Метою даної роботи є встановлення його переваг у порівнянні з традиційною передачею. Для досягнення мети було виконано теоретичне дослідження якісних показників працездатності, які відносяться до трьох рівнів – одиничні, комплексні та інтегральний. Для зубчастих зачеплень якісними показниками є швидкість ковзання, швидкість руху точок контакту у напрямку, нормальному до контактної лінії, відносні ковзання та приведена кривизна. Ці показники відносяться до групи геометро-кінематичних, оскільки залежать від геометрії зубців та кінематики передачі. Їх віднесено до одиничних та вони входять до складу комплексних показників, до яких зазвичай відносять контактну міцність активних поверхонь зубців, стійкість проти заїдання, зносостійкість, товщина масляного шару та питома робота сил тертя. Комплексні показники разом з геометро-кінематичними визначають втрати у зачепленні. Цей показник за своєю суттю є мірою ефективності зачеплення, а за алгоритмом його визначення – інтегральним показником. Встановлено, що у крайніх точках поля зачеплення синусоїдальні передачі мають щонайменше у 10,14 рази більший показник контактної міцності; у 10,13 рази менший показник заїдання; у 21,58 рази менший показник зносу поверхонь зубців шестірні; у 36,81 рази менший показник зносу поверхонь зубців колеса; у 6,57 рази більший показник товщини мастильної плівки; у 8,3 рази меншу питому роботу сил тертя на поверхні зубців шестірні; у 14,16 рази меншу питому роботу сил тертя на поверхні зубців колеса. Втрати у зачепленні синусоїдальної передачі у 2,13 рази менші. Таким чином підтверджено припущення розробника синусоїдального зачеплення Е. Вільдгабера (Ernest Wildhaber) про підвищену навантажувальну здатність, а також попередні результати, отримані першим дослідником цього зачеплення Ю.В. Анікіним. Результати роботи можуть бути використані для подальших експериментальних досліджень, зокрема для вибору рівнів навантаження редукторів при випробуваннях.Item Conductivity of composites of thermotropic ionic liquid crystals(Electronics and Control Systems 2015. N 2(44): 29-32, 2015) Gridyakina, AlexandraThis work presents the studies of the transport properties of samples of oriented binary composite of cobalt decanoate with lead decanoate. Found that samples of the mixture at the temperature range of liquid crystal existence are weak electrolytes, which have anisotropy of bulk conductivity caused by the ordering of molecules. The values of mobility and charge concentration were estimated.Item Conductivity of thermotropic ionic liquid crystals(Proceedings of the National Aviation University. 2015. N 3(64): 64–68, 2015) Gridyakina, AlexandraThe article represents the results of electrical conductivity studies of cobalt decanoate and lead decanoate oriented samples. It was determined that samples are weak electrolytes in the liquid crystal state region. The samples are characterized by great anisotropy of bulk conductivity caused by molecular order.Item Cubic Susceptibility and Hyper-polarizability of the Lyotropic Liquid Crystal−Viologen System(Ukr. J. Phys. 2008, Vol. 53, N 12, p.1167-1173, 2008) Bordyuh, Hanna; Polishchuk, ArkadiyNonlinear optical properties of the “lyotropic liquid crystal–viologen” system are investigated. The system shows electrochromism under the action of an external electric field. For the colored samples, the recording of dynamic holographic gratings is obtained, by using the pulse laser method. The main characteristics of a recording on such samples are studied. On their base in view of the electrooptical properties of the system, the mechanism of the recording of gratings is proposed. The recording is realized due to a change in the polarizability of the π-electron system of viologen derivatives under the action of an intense laser radiation. The main nonlinear optical parameters (n2, χ(3), γ) of the system under study are determined.Item CUDA-based massively parallel computing application for improving the efficiency of turbulent flows modeling and methods of their control(Aviation in the XXI-st century. Safety in aviation and space technologies: the seventh world congress, 19-21 of september 2016: abstracts. – K., 2016. – V.1. – P. 1.1.17-1.1.20., 2016) Tovkach, S.S.; Shkvar, E.A.A perspective approach of increasing the computing performance properties of turbulent flows, based on productivity of Graphics Processing Units utilization has presented. It can be effectively applied for development of new principles of adaptive turbulent flow control strategies.Item Decision making in complex systems(Проблеми інформатизації та управління: Збірник наукових праць: Випуск 1 (53).-К.:НАУ, 2016.- С.83 – 86., 2016) Churina, O.I.This article describes methods of decision-making in complex systems - fuzzy mathematical programming methods, implemented in the man - machine decision-making procedures with the use of the decisions support systems (DSS)Item Decision making in complex systems(National Aviation University, 2016) Churina OleksandraThis article describes methods of decision-making in complex systems - fuzzy mathematical programming methods, implemented in the man - machine decision-making procedures with the use of the decisions support systems (DSS)Item Design of worm gears with optimal geometric parameters based on minimization of losses in gearing(Національний авіаційний університет, 2018-02) Tkach, Pavlo; Nosko, Pavlo; Grygory, Boyko; Bashta, Oleksandr; Bashta, AllaThe mathematical model of definition of losses in gearing worm gears and their decrease on 10 … 15 % is stated at definition on the basis of planning mathematical experiment of rational parameters of transfers.Item Designing an automated decision support system for energy management system of educational institutions(Aviation in the XXI-st century. Safety in aviation and space technologies: the seventh world congress, 19-21 of september 2016: abstracts. – K., 2016. – V.1. – P. 1.1.11-1.1.14., 2016) Zaharchenko, Y; Sokolova, N; Burenina, GDetermining the causes and sources of losses in the accounting and energy consumption is the basis for making management decisions and construction of power management and energy efficiency measures.Item Diagnosis of bearing installation damage in gas turbine engines(Національний авіаційний університет, 2021-04) Башта, Олександр Васильович; Bashta, Oleksandr Vasylovych; Носко, Павло Леонідович; Nosko, Pavlo Leonidovych; Бовма, Ярослава Валеріївна; Bovma, Yaroslava ValeriivnaThe work is devoted to solving the problem of constructing a measuring channel based on an analog interface for diagnosing damage to bearing assemblies in gas turbine engines at an early stage of their occurrence. The reliability of gas turbine engines (GTE) is due to the durability of elements and components, which during operation are under the influence of mechanical, acoustic, gas and temperature loads. One of the key components of the gas turbine engine is a bearing assembly, namely a rolling bearing. An important task of practical diagnostics is to improve methods and means of vibrodiagnostics of bearing assemblies in the gas turbine engine at an early stage of damage (defects) based on the construction of a measuring channel with improved metrological characteristics.Item Dynamic analysis of the lever mechanism(НАУ, 2018-10) Башта, Олександр Васильович; Бойко, Григорій Олексійович; Носко, Павло Леонідович; Цибрій, Юрій ОлександровичThe iterative method of the law of movement of an initial link of the lever mechanism in time of settled regime definition, not connected with dynamic synthesis, is offered.Item Dynamic grating recording in lyotropic ionic smectics of metal alkanoates doped with electrochromic impurities(Elsevier, Optical Materials 31 (2009) 1109–1114, 2009) Bordyuh, Hanna; Polishchuk, ArkadiyIn this work, we investigated nonlinear-optical properties in lyotropic ionic liquid crystals (LILC) of potassium caprilate doped with electrochromic impurities (viologens). It is known that after applying a direct electric field to the LILC-viologen cells colouration of samples is observed [1]. Dynamic grating recording under the action of nanosecond pulse laser radiation was obtained for the coloured samples. We analyzed the origin of the optical nonlinearity in the investigated materials taking into account their electrochemical and electrooptical properties. To explain grating recording in LILC doped with viologens, we proposed the mechanism of photoconversion in viologen molecules.Item Educational and methodical complex of discipline "Designing of Machines and Mechanisms and Bases of Interchangeability"(2019-07-04) Корнієнко, Анатолій ОлександровичThe discipline “Designing of Machines and Mechanisms and Bases of Interchangeability” is the last general engineering discipline which combines engineering strength calculations theory and method of machines elements and units and provides fundamental engineering training of engineers. The purpose of teaching the discipline is formation of students' knowledge about the basics of calculation and designing of typical general purpose machine elements and units and aircrafts and also main principals of interchangeability of details and assembly units in avia and rocket designing. The main objective of the discipline is: - to study the general principles of design and construction of elements and components of general and special purpose, which are found in a variety of mechanisms and machines; - building models and computational algorithms of typical mechanical engineering with regard to the main criteria of efficiency that are needed in creating a new or upgrading existing and reliable operation of the industry equipment; - studying methods of interchangeability of parts and assembly units at the designing, manufacturing and during their operation; - ensuring the interchangeability with using "Unified system of tolerances and landings" in engineeringItem Educational and methodical complex of discipline "Details of Machines"(2019-07-04) Корнієнко, Анатолій ОлександровичThe discipline “Details of Machines” is the last general engineering discipline which combines engineering strength calculations theory and method of machines elements and units and provides fundamental engineering training of engineers. The purpose of teaching the discipline is formation of students' knowledge about the basics of calculation and designing of typical general purpose machine elements and units and aircrafts. The main objective of the discipline is to study the general principles of design and construction of elements and components of general and special purpose, which are found in a variety of mechanisms and machines; building models and computational algorithms of typical mechanical engineering with regard to the main criteria of efficiency that are needed in creating a new or upgrading existing and reliable operation of the industry equipment.