Articles

2021, Vol. 13. № 1

 

1. THE İNTELLECTUAL ANALYSİS ALGORİTHM OF AİRCRAFT FLİGHT DATA

ISMAYILOV I.M., BİNNATALİYEVA T.V.

 

DOI: 10.52171/2076-0515_2021_13_01_07_12

 

The article discusses the methodology of the intellectual analysis of the multiple flight data which were recorded during the flight of the aircraft and principles of system construction which realizes this technique. In the proposed method, a flight event can be detected based on the values of the flight data from the sets and the values of the flight data from one of the second sets of flight data. Moreover, if a flight event is not detected from the subset, then this subset is associated with the probability of pairing between at least one second set and this subset.

 

 

2. THE PROBLEM OF PROBABLE DISTRIBUTION PATTERNS OF THE MAIN OPERATIONAL FRICTION PAIR PARAMETERS OF BRAKES

 

A.Kh. JANAHMADOV, N.A. VOLCHENKO, M.Y. JAVADOV,

P.S. KRASIN, V.S. SKRIPNIK, I.O. BEKISH

 

DOI: 10.52171/2076-0515_2021_13_01_13_19

 

Prediction of the reliability of designed friction units of brake devices is possible only if there are patterns of the probable distribution of their main operational parameters. The latter include the dynamic friction coefficient of friction units and wear of the working surfaces of the pads.

The presence of numerous data from domestic and foreign researchers made it possible to describe the values of the probable distribution of friction materials and operational parameters of friction pairs in curves with different frequencies and amplitudes, which made it possible to establish the suitability of the use of materials, fluctuations in operational parameters and uneven wear of the working surface of each friction overlays

 

 

3. EXPERIMENTAL INVESTIGATION OF THE INFLUENCE OF THE DEVIATION ANGLE OF THE ROPE ON ITS DURABILITY

 

N.M. FIDROVSKA, V.S. SKRIPNIK, I.G.KERECHENKO, V.V. NESTERENKO, O.S. PYSARTSOV

 

DOI: 10.52171/2076-0515_2021_13_01_20_24

 

All ropes, according to the rules of the State Labour Service, count on the static load without taking into account the bending and torsional stresses. The estimating the rope is based on the density of the rope and the maximum straight length. The operating conditions of rope are very different from the conditions of their work on the running machine. However, experimental studies conducted by scientists help to determine the influence of various factors on the durability of ropes. Based on these experiments, the rope estimation methods were developed.

The use of the proposed machine with a rocker mechanism for fatigue tests will expand the empirical data on the rope wear at different angles; therefore, will increase the durability of the use of ropes in lifting machines.

 

 

4. RESEARCH ON HYDRODYNAMIC PARAMETERS OF WET FRICTION PAIRS OF DISC-SHOE BRAKE OF VEHICLE

 

A.Kh. JANAHMADOV, A.İ. VOLCHENKO, M.M. NASIROVA, N.A. VOLCHENKO,

V.S. VITVITSKIY, E.S. FEDOTOV

 

DOI: 10.52171/2076-0515_2021_13_01_32_42

 

The article considers the following issues: the influence of design features of various types of the brake discs on the intensity of their irrigation with water; the use of generalized variables in analytical study of electrothermomechanical friction interaction of the wet friction pairs of disc brakes; the determination of water layer thickness on surface of solid disk during electrothermomechanical friction by method of generalized variables.

The designs of continuous and self-ventilated brake discs were analyzed taking into account the areas of their surfaces irrigated with water, as well as weight characteristics that affect the energy load of wet friction pairs of vehicle brakes.

A new method of estimating the allowable thickness of a water film covering the friction belt of any disk based on the second similarity theorem using the method of generalized variables using similarity criteria is proposed. A criterion equation was obtained for determining the permissible thickness of the water film taking into account the topography of the surface of the disk friction belt. The results of calculations are presented in the form of graphical dependencies.

 

 

5. THE MATHEMATICAL MODELING ASPECTS OF MULTI-FACTOR OPERATIONS AND COMPLEX TECHNOLOGICAL PROCESSES OF MACHINE AND EQUIPMENT PARTS PROCESSING

 

H.V. GAFARZADE

 

DOI: 10.52171/2076-0515_2021_13_01_43_49

 

The article considers the issues of multifactor operations and complex technological processes mathematical modeling of high-precision details machining of machines and equipment. It is clarified that if the mathematical notation of operations and processes is given as a form of finite and differential equations complex system, then the application of the mathematical model depends significantly on the construction of an effective modeling algorithm.

 

 

6. THE ISSUE OF OPTIMAL DISTRIBUTION OF LIMITED GASES BETWEEN THE WELLS WORKING PARALEL WITH GAS-LIFT METHOD

 

A.N. QURBANOV, I.Z. SARDAROVA

 

DOI: 10.52171/2076-0515_2021_13_01_50_53

 

The task of optimal distribution of limited amount of gas between parallel working gas-lift wells, having different performance characteristics was set. Mathematical model of wells was obtained by means of numerical experiments and optimization problem was solved with the application of the method of Lagrange multipliers, thus was shown obtaining of maximum performance.

In order to solve the issue, a mathematical model of the productivity characteristics of wells P(xi) should be prepared. As mentioned, 3 different gas lift wells were selected for numerical experiment. To obtain the mathematical model of the productivity characteristics of wells, 50 experimental values were obtained using the passive experimental method, and the smallest squares method was used to find the coefficients of the mathematical model.

 

 

7. DIAGNOSIS OF UNSTABLE HYDRAULIC CHARACTERISTICS IN MULTIPHASE PIPELINES

 

F.B. ISMAYILOVA, E.Kh. ISKANDAROV

 

DOI: 10.52171/2076-0515_2021_13_01_54_57

 

The experience of exploitation of multi-phase pipelines shows that, depending on the structure of the transported systems, unbalanced features, pressure pulsations and the presence of unstable zones in hydraulic characteristics often occurs. Therefore, it is important to model the flow of these systems through the pipe and to identify the conditions of instability associated with the multiphase flow.

The article shows the possibility to build a mathematical model for the flow of gas-liquid system through the pipeline in the conditions of phase transitions. In order to assess the hydraulic characteristics of the gas-liquid flow, different structural forms of flow were considered depending on the pressure change along the length of the pipeline. It has been found that the dependence of the pressure difference on the flow can be expressed by the cubic equation and the zones where the stable characteristic is present can be determined.

 

 

 

 

 

2021, Vol. 13. № 2

 

1. Stochastic Approach to Estimating Stresses of Polymer

Films from the Surface Microprofile

 

A.M. Pashayev, and A.Kh. Janahmadov

National Aviation Academy of Azerbaijan (Mardakan ave, 30, Baku, AZ1045, Azerbaijan)

 

DOI: 10.52171/2076-0515_2021_13_02_7_26

 

Abstract

The existing methods for determining the internal (residual, shrinkage) stresses arising from the curing of thin films of paint and varnish coatings (PVC), based on the cantilever bending of the substrate and the difference in the thicknesses of the wet and dry coatings, are analyzed. The dependence of their accuracy on the film / substrate thickness ratio and the uniformity of the applied film is noted. The application of atomic force microscopy methods based on measuring the geometry of the regular microrelief (RMR) of the film surface, which serves as a characteristic manifestation of its shrinkage deformations, is considered. It is noted that when applying the Euler problem on the stability of a compressed rod, the method demonstrates the calculated stress values unattainable for most polymers. The calculation of internal stresses and strains was carried out on the basis of a stochastic approach, taking into account the “checkerboard” distribution of deformation defects on the outer surface of the film. On the example of RMR film of polyester urethane varnish, the level of internal stresses was assessed using the proposed and existing methods. The values of internal stresses obtained by the three methods relatively coincide with each other, the difference between them does not exceed ~20%.

 

 

2. Assessment of Thermal Potential in Disc Brake of Transportation Unit

M.Y. Javadov¹, B.V. Dolishniy², V.S. Skrypnyk², D.Y. Zhuravlev²,

M.M. Nasirova³, N.A. Volchenko⁴, L.B. Malyk²

¹ Azerbaijan Engineering Academy (Mardakan ave, 30, Baku, AZ1045, Azerbaijan)

² Ivano-Frankivsk National Technical University of Oil and Gas (15 Karpatska St., Ivano-Frankivsk, 76019,   

  Ukraine)

³ National Aviation Academy of  Azerbaijan (Mardakan ave, 30, Baku, AZ1045, Azerbaijan)

⁴ Kuban State Technological University (2, Moskovskaya st., Bld. A, Krasnodar, 350072,  Russia)

 

 

Abstract

Potentials and their gradients are analyzed in mechanical, heat, chemical, electrical, magnetic fields arising during elektrothermomechanical interaction of friction pairs of disc-block tormos of vehicles. Influence of diffusion and adsorption potentials on formation of double electric layers on friction belts of solid disks during braking is shown. The effect of local thermal potential on the friction layer of the solid brake disc is considered from the point of view of obtaining excessive entropy. Stable state of elementary volume of disk friction belt layer is estimated through local functionals, which take into account fluctuation of its energy load.

 

 

3. ANALYSIS OF MODELING, OPTIMIZATION AND CONTROL METHODS OF MULTIFACTOR OPERATIONS AND COMPLEX TECHNOLOGICAL PROCESSES

H.V. GAFARZADA

Azerbaijan State University of Oil and Industry (Azadlig ave 16/21, Baku, AZ 1010, Azerbaijan)

 

DOI: 10.52171/2076-0515_2021_13_02_40_47

 

Abstract

Modeling, optimization and management of multifactor operations and complex technological processes of machines and equipment parts’ enameling was discussed in the article. It has been established that the main advantage of mathematical models construction for individual processing operations is the possibility to create mathematical models in new variants for different technological processes using these models. It was clarified that mathematical models reflecting processing operations and technological processes used to manufacture machine and equipment must take into account the key factors that characterize them. Studies show that the mode and technological factors of separate processing operations and technological processes are directly related to the accuracy and quality of the prepared parts. Taking all these factors into account not only complicates the proposed mathematical models, but also makes difficult, in some cases completely impossible to use and analyze them. From this point of view, they should be divided into main and second grade factors according to their impact level. Therefore, it should be considered appropriate to the purpose to take into account mostly main factors that characterize operations and processes to build mathematical models.

 

 

 

4.    DETERMINATION OF THE RUNNING MODE OF THE DRILLING TOOL INTO THE BOREHOLE TAKING INTO ACCOUNT THE PISTON EFFECT A.M. ALIYEV

Azerbaijan State Oil and Industrial University (Azadliq ave, 34, Baku, AZ1010, Azerbaijan)

 

DOI: 10.52171/2076-0515_2021_13_02_69_77

 

Abstract

When the drill string is run into the well, the load acting on the system can in some cases reach a dangerous level due to the load acting during pulling up. For example, if the weight of the casing being lowered into the hole is greater than the weight of the raised drill string, or when the drill string is lowered into the hole at high speed, very large dynamic forces can be generated that do not exist during pulling out. The only controllable parameters when running the drill string into the well for the length of one plug are the maximum value of the descent speed and the rate of deceleration. The relationship between these two parameters ultimately determines the efficiency of the lowering operation, which, in turn, is characterized by such factors as the operating mode of the equipment; compliance with technological requirements; physical load of the operator (driller). The goal is to determine the scientifically and technically sound mode of running the drilling tool taking into account the piston action. The permissible speeds of the drilling tool and the displacement of the string for the length of one plug during the well run, the speed of fluid movement in the annulus, were determined based on the equation of equilibrium of pressures in the well. Taking into account the turbulent regime of fluid movement in the annulus, the regime of safe running of the tool was determined to prevent hydraulic fracturing and ensure high-quality development of the productive horizon.

 

 

2021, Vol. 13. № 3

 

1. APPLICATION OF FRACTIONAL DERIVATIVES FOR DESCRIPTION OF KINETIC CURVATURE OF THERMOOXYLIC POLYMERS (PART II)

A.Kh. Janahmadov¹, O.A. Dyshin², I.A. Habibov³, S.A. Agamamedova³, I.S. Gasanzade³

¹ National Aviation Academy of Azerbaijan (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

² SRI “Geotechnological problems of oil, gas and chemistry” (D. Aliyeva st. 227, Baku, AZ1010, Azerbaijan)

³ Azerbaijan State University of Oil and Industry (Azadlig ave, 16/21, Baku, AZ 1010, Azerbaijan)

 

DOI: 10.52171/2076-0515_2021_13_03_7_17

 

Abstract

To describe the kinetic curves of thermo-oxidation failure, the differential equations of fractional order with the right-hand side, depending on the order of oxidation reaction, are proposed. It is shown that thermal oxidation destruction is possible only in the case of the fractal structure of the polymer. For the kinetic curves such as auto-slow as well as auto-accelerated type, the order of derivate in equation is coincide with the fraction of conserved part of the macromolecular polymer coil.

 

 

2. THERMAL BALANCE OF INTERNAL COMBUSTION ENGINES AND METHODS OF REDUCING HEAT LOSSES

 

M.Y. Javadov¹, V.S. Skrypnyk², B.V. Dolishniy², N.A. Volchenko³,

S.V. Nikiptchuk⁴, A.N. Vudvud⁵

 

¹ Azerbaijan Engineering Academy (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

² Ivano-Frankivsk National Technical University of Oil and Gas (Karpatska st. 15, Ivano-Frankivsk, 76019, Ukraine)

³ Kuban State University of Technology (Moskovskaya st. 2, Bld. A, Krasnodar, 350072, Russia)

⁴ Lviv Polytechnic National University (Stepana Bandery st. 12, Lviv, 79013, Ukraine)

⁵ Odessa National Polytechnic University (Shevchenko ave. 1, Odessa, 65044, Ukraine)

 

 

DOI: 10.52171/2076-0515_2021_13_03_18_26

 

Abstract

The paper focuses on the thermal balance of internal combustion engine systems, thermal energy loading and ways to reduce it. Factors influencing the energy loading of critical engine parts are highlighted: the ratio of areas of matte and polished surfaces taking part in heat exchange processes, the metal content of the parts and the heat conductivity factors of their materials. The influence of heat transfer coefficient in multi-layered resistance system is established: heat capacity, thermal heat conductivity and heat transfer. The choice of the engine energy mode is dictated by the conditions of optimum performance of the working process of the thermal strength of the parts, and it is therefore necessary to avoid both overheating and supercooling of engine.

3. DETERMINING THE ACCURACY OF WATER PRESSURE PROCESSING USING 3D SCANNING

F.G. Amirov¹, S. Simon², W. Steffen², S.F. Amirli², K. Frana³

¹ Azerbaijan Technical University (Husein Javid ave, 25, Baku, AZ1073, Azerbaijan)

² Brandenburg University of Technology (Universitätsplatz 1, Cottbus-Senftenberg, Senftenberg,01968, Germany)

³ Technical University of Liberec (Studentska 1402/2, Liberec, 46117, Czech Republic)

 

DOI: 10.52171/2076-0515_2021_13_03_38_44

 

Abstract

 

The article provides the results of the study of manufacturing tolerances in waterjet cutting by the method of three-dimensional (3D) measurements: shape deviations were shown by three-dimensional comparison of scanned samples. The dimensions were also measured using two-dimensional (2D) sections of the scanned samples. It has been determined that the clean waterjet cutting tends to separate soft materials such as plastic, foil, foam or paper, as well as food. Unlike the pure waterjet cutting, the abrasive cutting is used for hard materials such as steel, ceramics, glass. The optimal pressure for material processing has been calculated. Particular emphasis is placed on the separation of composite materials, which cannot be satisfactorily accomplished using conventional methods.

 

 

2021, Vol. 13. № 4

 

1. ACOUSTO-OPTIC MARKER FOR DETERMINING THE WEIGHT AND CENTER OF GRAVITY OF THE AIRCRAFT

 

E.A. AGAYEV

Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

 

DOI: 10.52171/2076-0515_2021_13_04_ 07_13

 

Abstract

The article shows the application of a new method for determining the center of gravity and weight of the aircraft and the process of its implementation. For this purpose, using the acousto-optic marker is measured displacement of the front and rear sides of the fuselage and is determined the center of gravity and weight on the basis of the obtained values. The method is synthesized on the basis of an acousto-optic modulator operating in Bregg diffraction mode. The distance determined by the laser rangefinder is used as the support parameter. Based on the support parameter is formed a high-precision measurement marker perpendicular to it.

 

 

 

2. ESTIMATION OF ENERGY LEVELS OF CONTACTS AND TRIBOLOGICAL PROPERTIES OF MATERIALS OF FRICTION PAIRS

A.Kh. Janahmadov¹, N.A. Volchenko², M.Y. Javadov³,

D.Y. Zhuravlev ⁴, S.A. Shasherina², N.N. Romaniv⁴

¹Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

 ² Kuban State University of Technology (Moskovskaya st. 2, bld. A, Krasnodar, 350072, Russia)

³ Azerbaijan Engineering Academy (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

⁴ Ivano-Frankivsk National Technical University of Oil and Gas (Karpatska st. 15, Ivano-Frankivsk, 76019, Ukraine)

 

DOI: 10.52171/2076-0515_2021_13_04_ 14_21

 

Abstract

Estimation of the energy levels of contacts of microprotrusions of friction pairs “shoe-disk” was carried out on a friction and wear machine SMTs-2. In this case, the block was made of ordinary Kh12MF steel, and the disk was diffusion-coated with a Ni-Cu alloy and reinforced by surface plastic deformation. Experimental studies carried out on four test cycles made it possible to obtain profiles of profilograms and use them to establish the types of contacts (ohmic, neutral and blocking) for the samples and their duration of action. Investigation of the tribotechnical properties of the “shoe-disk” friction pairs made it possible to determine: surface temperature, dynamic coefficient of friction and wear of the samples. At the same time, the influence of diffusion metallization and surface plastic deformation on the relative wear resistance and roughness of samples made of Kh12MF steel was established. The physical substantiation of the obtained parameters is given.

 

 

 

3. ON THE EFFICIENCY OF FORCED AIR COOLING OF FRICTIONAL CONNECTIONS OF BRAKE DEVICES

N.A. Volchenko¹, V.T. Balonniy², V.S. Skrypnyk³, M.M. Nasirova⁴,

N.M. Ostashuk⁵, D.Y. Zhuravlev⁴, V.S. Vitvitskiy³

¹ Kuban State Technological University (Moskovskaya  st. 2, bld A, Krasnodar, 350072, Russia)

² Drohobych College of Oil and Gas (M. Hrushevskoho st. 57, Drohobych, 82100, Ukraine)

³ Ivano-Frankivsk National Technical University of Oil and Gas (Karpatska  st., 15, Ivano-Frankivsk, 76019,   

  Ukraine)

⁴ Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

⁵ Lviv Polytechnic National University (S.Bandery st., 12, Lviv, 79000, Ukraine)

 

DOI: 10.52171/2076-0515_2021_13_04_22 _33

 

Abstract

The materials of the article are devoted to the features of forced, direct cooling with moist compressed air of the working surfaces of friction pairs of brake devices. The results of a computational experiment concerning the design parameters of the cooling system and its operational parameters are presented. The efficiency of air cooling of the drum-shoe brake friction pairs is estimated. Attention is paid to the peculiarities of forced cooling with moist compressed air of brake tribo couplings. Compressed air pressures have been established, at which it is possible to forcibly cool the friction pairs of drum-shoe and band-shoe braking devices.

 

 

4. INVESTIGATION OF HYDROGEN WEAR IN HEAVY LOADED METAL FRICTION ELEMENTS OF BRAKES

 

A.Kh. Janahmadov¹, V.S. Skrypnyk², N.A. Volchenko³,

A.N. Yahyayeva¹, D.Y.  Zhuravlev², A.S. Yevchenko³

¹ Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

² Ivano-Frankivsk National Technical University of Oil and Gas (Karpatska st.15, Ivano-Frankivsk, 76019, Ukraine)

³ Kuban State University of Technology (Moskovskaya st. 2, bld. A, Krasnodar, 350072, Russia)

 

DOI: 10.52171/2076-0515_2021_13_04_34_46

 

Annotation            

In the materials of the article, the following issues are considered: design, operation and energy loading of friction pairs of brake devices; the difference between internal and external friction of a metallic friction element; boundary conditions in the interaction of external and internal layers of material pairs. It has been established for what reason the subsurface layer of the metal friction element has a high surface-bulk temperature. This effect is associated with the action of pulsed specific loads during electrothermomechanical friction, which “tamp” the atoms of the crystal lattices in the layer and between the layers. As a result, the layers have high electrothermal resistance, which contributes to the accumulation of thermal energy. The thickness of the electrothermal layer of the metal friction element was determined by calculation.

 

 

5. NONLINEAR DEFORMATION ANALYSIS OF COMPRESSED REINFORCED CONCRETE ELEMENTS OF CIRCULAR CROSS-SECTION

U.M. Hajiyeva

Azerbaijan University of Architecture and Construction  (A.Sultanova st., 5, Baku, AZ1073, Azerbaijan )

 

 

DOI: 10.52171/2076-0515_2021_13_04_47_57

 

Abstract

The creep of concrete plays an important role in the formation of the stress-strain state of reinforced concrete elements. The creep of concrete strongly affects the bearing capacity of compressed reinforced concrete elements. In the article, taking into account the nonlinearity of instantaneous and long-term deformations, an effective numerical method is developed for calculating compressed reinforced concrete elements of circular cross-section. For this purpose, a discrete analogue of the nonlinearly hereditary concrete creep equation was first constructed. When solving special relaxation problems, the high accuracy of the proposed discrete analog is shown. In long-term loadings the solution of the considered problem is reduced to the solution of a nonlinear system of algebraic equations. A numerical algorithm for solving the resulting nonlinear system with any desired accuracy is proposed, and the effectiveness of the proposed algorithm is proved in numerical examples.

 

 

2022, Vol. 14. № 1

 

1. INCREASING THE WEAR RESISTANCE OF MATERIALS IN FRICTION VAPORS OF TOP-MOSE DEVICES TAKING INTO ACCOUNT HYDROGEN WEAR

 

A.Kh. Janahmadov¹, V.S. Skrypnyk², N.A. Volchenko³, A.S. Evchenko³,

A.N. Yahyayeva¹, V.N. Volchenko³

¹ Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

² Ivano-Frankivsk National Technical University of Oil and Gas (Karpatska st. 15, Ivano-Frankivsk, 76019, Ukraine)

 ³ Kuban State University of Technology (Moskovskaya st. 2, Krasnodar, 350072, Russia)

 

DOI: 10.52171/2076-0515_2022_14_01_07_24

 

Abstract

In the article, the value of external and internal hydrogen in the contact zones of microprotrusions of brake friction pairs is highlighted. The interaction of external hydrogen with internal hydrogen located in the subsurface layer of the metal friction element is illustrated. In friction pairs with electrothermomechanical frictional interaction, the source of hydrogen is the surface layer of the polymer lining during the cracking process. In the study of hydrogen wear, the following were considered: adhesion, adsorption, diffusion in electric and thermal fields, as well as an assessment of the stress-strain state of brake friction pairs. A method for industrial research of friction pairs of band-shoe brakes of drawworks is described, which prevents the release of hydrogen from the steel surface of the pulley rim by an electric field with the same charges, which restrict the movement of hydrogen ions.

 

 

2. METHODS AND MEANS OF REDUCING ENERGY LOAD AND HYDROGEN WEAR OF FRICTION PAIRS OF THE BAND-SHOE BRAKE OF THE DRILLING WINCH

 

V.S. Skrypnyk¹, M.Y. Javadov², V.T. Balonniy³, D.A. Volchenko¹,

I.O. Bekish¹, N.A. Volchenko⁴, A.S. Yevchenko⁴

¹Ivano-Frankivsk National Technical University of Oil and Gas (Karpatska st. 15, Ivano-Frankivsk, 76019, Ukraine)

² Azerbaijan Engineering Academy (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

³ Drohobych College of Oil and Gas (M. Hrushevskoho st. 57, Drohobych, 82100, Ukraine)

⁴ Kuban State University of Technology (Moskovskaya st. 2, Krasnodar, 350072, Russia)

 

DOI: 10.52171/2076-0515_2022_14_01_25_40

 

Abstract

 

In the materials of the article, the issues are considered in relation to the problem being solved: the construction of crystal lattices of metals and their parameters; assessment of the state of atoms in the crystal lattice of a metal from the standpoint of molecular dynamics; stress-strain state of brake discs and centers of hydrogen wear of their working surfaces. In the study of a metal friction element, a model of a multilayer atomic structure in the form of a bellows was adopted, which, under the action of pulsed specific loads, compresses its corrugations. When the load is removed, the multilayer atomic structure expands due to the elastic forces. It was found that the rate of the process of compression is hundreds of times higher than the rate of the process of expansion of a multilayer atomic structure.

 

 

4. THE IMPACT OF HIGH SPEED MECHANICAL PROCESSING EFFICIENCY ON THE PRODUCTION PROCESS

 

S.F. Amirli¹, P. Fritsche¹, I.T. Abbasov¹, S. Wichmann¹,

1. Simon¹, F.G. Amirov², A.S. Mammadov²

¹      Brandenburg University of Technology (Universitätsplatz 1, Cottbus-Senftenberg, Senftenberg,     01968,  Germany)

 ²    Azerbaijan Technical University (Husein Javid ave. 25, Baku, AZ1073, Azerbaijan)

 

DOI: 10.52171/2076-0515_2022_14_01_41_51

 

 

Abstract

The main purpose of the article is to increase productivity, reduce processing time and at the same time increase the cutting speed. The results are also displayed in Excel using a number of cutting parameters. For this purpose, the article shows the results of both high-speed milling and high-speed turning of a machine with different types of tools, as well as processing of one tool on different types of machines. Unlike other machines, in general, the work on the machines of universal processing centers turned out to be more productive. The feed rate of the machine tools is the focus area here. If we increase cutting values, then the tool life is reduced and that leads to higher tool costs. With universal high-performance machines we cannot save costs for tools (we can only save machine tool costs). Compared to universal high-performance machines, we can save tool costs with Universal Machining Center. Therefore, it is suggested to do the machining with the universal machining center, although the machining time and cutting time is faster with the universal high-performance machine.

 

 

5. CONSECUTIVE FILTRATIONS OF VARIOUS UNCOMPRESSED UNMIXED

LIQUIDS IN HOMOGENEOUS LAYER IN DIFFERENT SIMPLE FLOWS

DUE TO SOME FILTRATION LOWS

G.G. Mammadova

Azerbaijan State University of Oil and Industry (Azadlig ave., 16/21, Baku, AZ 1010, Azerbaijan)

 

 

DOI: 10.52171/2076-0515_2022_14_01_52_59

 

Abstract

Three tasks on hydrodynamic stationary filtration of two uncompressed unmixed viscous-elastic liquids taking place in various simple flows to the gallery and to the well hove been solved due to the various generalized Darcy filtration low. Difference of the filtration lows is conditioned with that these viscous-elastic liquids differ due to SMS liquids values. In all tasks all main formulae characterizing the filtration process, that’s filtration rate, lows distributing current pressures and current pressure gradients discharges of galleries and wells have been. It is necessary to apply these formulae when solving theoretical task for development of oil deposits, and also when designing the projects of development of new exploration deposits.

 

 

6. STAGNANT ZONE FEATURES ON WELL OPERATIONS

 

X.I. DADASH-ZADA, S.H. NOVRUZOVA, E.V. GADASHOVA

Azerbaijan State University of Oil and Industry (Azadlig ave., 16/21, Baku, AZ 1010, Azerbaijan)

 

 

DOI: 10.52171/2076-0515_2022_14_01_60_69

 

Abstract

Performance of numerous lab and field researches have demonstrated that the basic laws described in fluid filtration theory are relevant for gas filtration as well. Analysis shows that as gasses possess higher permeability coefficients in comparison to fluids, sliding effect occurs, i.e. gas velocity near formation top and bottom (near boundaries) isn’t, unlike fluid velocity, zero. Hence gas filtration is higher than described by linear filtration law. It is determined that development of skin zone at the bottom hole of the well, that increases resistivity of said zone via decrease in permeability, porosity, etc., greatly affects well productivity. Besides that development of that zone during radial gas filtration decreases volume of the depression funnel, that affects well productivity.

 

 

 

2022, Vol. 14. № 2

 

1. MEASUREMENT BY AIR DATA SYSTEM OF SPATIAL POSITION

AND DIRECTION OF AIRCRAFT

T.I. KARIMLI

Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

 

DOI: 10.52171/2076-0515_2022_14_02_7_14

 

Abstract

 

The article gives a review of air data  system,   the perspectives for expanding the improvement of its functional capability are determined. The conditions for increasing the technical capabilities of smart air signal systems, produced on the basis of advanced technology used on the 5th generation US military aircraft and civil aircraft, have been determined. The installation of additional air pressure receivers on smart air signal systems, along with the measured altitude and speed parameters, presents the possibilities and algorithms for measuring the angles of roll, pitch, yaw and lateral speed of aircraft, which are the necessary primary flight parameters.

 

 

2. CALIBRATION OF KA-14 LIDAR TO MEASURE THE FLUORESCENCE

SPECTRA OF OILS EXTRACTED IN VARIOUS ZONES

 

I.Z. SADIKHOV

Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

 

 

DOI: 10.52171/2076-0515_2022_14_02_15_19

 

Abstract

 

Laser sensing methods have been used since the 60s, and since the 90s this method has reached a new level along with the reduction in the cost of the element base, and the development of computer technology and software. Currently, the laser sensing method has been recognized as one of the most modern active methods of remote sensing of environment. KA-14 LIDAR (Light Detection and Ranging) developed at the National Academy of Aviation was successfully tested for the detection of oil pollution, and based on the analysis of fluorescence spectra of detected oil spills, distinctive features were observed between the spectra of oil samples extracted in the zones of the Absheron Peninsula. To create a database based on the spectra of various oil samples belonging to various Oil-Gas-Production Companies (OGPC), the KA-14 LIDAR calibration process was carried out, and the fluorescence spectra of the mentioned samples were measured using the calibrated KA-14 LIDAR. The database that will be created based on these results can be used to determine to which Company of the Absheron Peninsula the identified oil leak belongs to.

 

3. NON-EQUILIBRIUM THERMODYNAMICS WITH LINEAR MODES

IN TRIBO-COUPLINGS (PART I)

 

A.KH. JANAHMADOV¹, D.A. VOLCHENKO², N.A. VOLCHENKO³,

V.S. SKRYPNYK², D.YU. ZHURAVLEV², L.B. МАLYK⁴

¹ Azerbaijan National Academy of Aviation (Mardakan ave, 30, Baku, AZ1045, Azerbaijan)

² Ivano-Frankivsk National Technical University of Oil and Gas (Ivano-Frankivsk, Ukraine)

³ Kuban State Technological University (International Activities Support Department, Room A-523, 2, Moskovskaya st., Bld. A, Krasnodar, 350072, Russia)

⁴ Drohobich College of Oil and Gas (Qrushevski str. 57, Drohobich, 82100, Ukraine)

 

 

DOI: 10.52171/2076-0515_2022_14_02_20_30

 

Abstract

The article examines the following questions: thermal conductivity and thermoelectric phenomena in tribo-couplings; electro-kinetic phenomena and chemical reactions in tribo-couplings; the discussion of the results. An algorithm of non-equilibrium thermodynamics is proposed, which contains thermal conductivity and thermoelectric phenomena in a non-massive metal friction element and electrokinetic phenomena in the near-surface layers of a polymer lining. In linear modes of operation of friction pairs of brakes, it is shown that due to the cross effect with temperature gradients for metal elements, two equilibrium states are revealed – a steady surface temperature and a thermal stabilization state; for a polymer lining, the equilibrium state is considered to be the burnout of the binder components from its near-surface layer with the formation of liquid islands. The flow of electrokinetic phenomena in the near-surface layer of the polymer lining and the determination of: the potential of the fluid flow and the resulting electric current; effect of electro-osmosis and liquid pressure. From the above parameters, ratios are formed that are equal to the Onsager and Saxen ratios, which makes it possible to determine the parameters by calculation.

 

 

 

4. PHYSICAL METHODS FOR ASSESSING THE LOAD OF FRICTION PAIRS

OF BRAKING DEVICES (PART II)

 

D.YU. ZHURAVLEV¹, M.Y. JAVADOV², V.S. SKRYPNYK¹,

N.A. VOLCHENKO³, P.S. KRASIN³, A.S. EVCHENKO³

¹ Ivano-Frankivsk National Technical University of Oil and Gas (15 Karpatska St., Ivano-Frankivsk, 76019, Ukraine)

 ² Azerbaijan Engineering Academy (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

³ Kuban State Technological University (International Activities Support Department, Room A-523, 2,  

 Moskovskaya st., Bld. A, Krasnodar, 350072, Russia)

 

 

DOI: 10.52171/2076-0515_2022_14_02_31_47

 

Abstract

In the first part of the paper, the attention is given to the main principles of the physical methods, as well as the “mechanical-thermal” loading of friction pairs of braking devices. In the second part of the paper, the analysis of principles is conducted and their impact on the energy fields of the brake friction pairs are illustrated. Based on the operation of the principles, the following energy fields are distinguished in pairs: “electric-heat,” “chemical-thermal”, and “electromagnetic”. The “electric heat field” is based on the contact-pulse interaction of micro-protrusions of friction surfaces with various gradients of electrical potential and temperature under given boundary conditions. The “chemical-thermal” field rests on the model of a double electric layer in a pair of brake friction. The “electromagnetic” field is associated with a harmonic variable external electric field. Let us give an analysis of all energy fields.

 

 

5. APPLICATION OF THE FINITE ELEMENT METHOD IN THE CALCULATION OF SHELLS OF REVOLUTION

 

A.N. GURBANOV, I.Z. SARDAROVA, L.A. ALİYEVA

Azerbaijan State University of Oil and Industry (Azadlig ave. 16/21, Baku, AZ1010, Azerbaijan)

 

 

DOI: 10.52171/2076-0515_2022_14_02_48_54

 

 

Abstract

The paper describes an algorithm for calculating structurally orthotropic shells of rotation with an arbitrary shape of the meridian and an arbitrary law of change in the rigidity of the shell along the meridian. In this case, a number of restrictions are imposed on the law of change in the shell stiffness. Under the action of an axisymmetric load on the shell, the method of dividing the shell into a system of curvilinear rods lying on elastic supports and an elastic foundation turned out to be effective. At the same time, the limitations inherent in these algorithms do not provide a solution to many problems of interest to a design engineer. In this regard, the finite element method, which was previously successfully applied in the study of unsupported shells, is promising.

 

 

 

2022, Vol. 14. № 3

 

1. CALIBRATION OF KA-14 LIDAR TO MEASURE THE FLUORESCENCE

SPECTRA OF OILS EXTRACTED IN VARIOUS ZONES

 

I.Z. SADIKHOV

Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

 

 

DOI: 10.52171/2076-0515_2022_14_03_07_11

 

Abstract

Laser sensing methods have been used since the 60s, and since the 90s this method has reached a new level along with the reduction in the cost of the element base, and the development of computer  technology and software. Currently, the laser sensing method has been recognized as one of the most modern active methods of remote sensing of environment. KA-14 LIDAR (Light Detection and Ranging) developed at the National Academy of Aviation was successfully tested for the detection of oil pollution, and based on the analysis of fluorescence spectra of detected oil spills, distinctive features were observed between the spectra of oil samples extracted in the zones of the Absheron Peninsula. To create a database based on the spectra of various oil samples belonging to various Oil-Gas-Production Companies (OGPC), the KA-14 LIDAR calibration process was carried out, and the fluorescence spectra of the mentioned samples were measured using the calibrated KA-14 LIDAR. Author would like to note that the database based on these results can be used to determine the ownership of an identified oil leakage in the Absheron Peninsula.

 

 

2. NON-EQUILIBRIUM THERMODYNAMICS WITH LINEAR MODES IN

TRIBOCOUPLINGS (PART II)

 

A.KH. JANAHMADOV¹, D.YU. ZHURAVLEV², V.N. VOLCHENKO³,

V.T. BALONNIY⁴, V.YA. МАLYK⁴

¹ Azerbaijan National Academy of Aviation (Mardakan ave., 30, Baku, AZ1045, Azerbaijan)

² Ivano-Frankivsk National Technical University of Oil and Gas (Ivano-Frankivsk, Ukraine)

³ Kuban State Technological University (International Activities Support Department, Room A-523, 2,   

  Moskovskaya st., Bld. A, Krasnodar, 350072, Russia)

⁴ Drohobich College of Oil and Gas (Qrushevski str. 57, Drohobich, 82100, Ukraine)

 

 

DOI: 10.52171/2076-0515_2022_14_03_12_23

 

Abstract

An investigation of non-equilibrium thermodynamics with linear regimes in tribocouplings of brake devices is carried out using Fourier’s laws of thermal conductivity and Fick’s effect, as well as the Sora and Dufour effects in relation to the flow of non-equilibrium processes of diffusion and thermal diffusion in the surface layers of friction linings. It is shown that there is an increase in the surface-volume temperature, which contributes to an increase in the volume of exit of endothermic reaction products from the upper layer of the polymer lining, as well as an increase in the equilibrium constant, which is accompanied by the release of heat. In this case, in accordance with the principle of van’t Hoff’s mobile equilibrium, elastic-plastic deformation of the microprotrusions of the working surface of the metal friction element occurs. A change in the degree of dispersity and compactness of the phases that appear in the upper layer of the polymer lining containing amorphous and vitreous substances significantly affects their chemical activity. The application of the Onsager reciprocity relation made it possible to determine the quantitative dependences between the diffusion and thermal diffusion parameters and their coefficients by calculation and experiment.

 

 

3. FLOW OF ELECTRIC CURRENTS IN OHMIC CONTACTS OF FRICTION COUPLES OF BRAKING DEVICES

 

D.A. VOLCHENKO¹, M.Y. JAVADOV², V.S. SKRYPNYK¹,

N.A. VOLCHENKO³, D.YU. ZHURAVLEV¹

¹Ivano-Frankivsk National Technical University of Oil and Gas (Karpatska st. 15, Ivano-Frankivsk, 76019, Ukraine)

² Azerbaijan Engineering Academy (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

³Kuban State University of Technology (Moskovskaya st. 2, bld. A, Krasnodar, 350072, Russia)

 

 

DOI: 10.52171/2076-0515_2022_14_03_24_40

 

Abstract

The paper exams the energy levels of contacts in the frictional interaction of metal-polymer and semiconductor materials; ohmic contact in the system: “metal-polymer” and “metal-semiconductor”; the analysis of results. In this case, the height of the potential barrier between their materials in the near-contact zone and in the “metal-semiconductor” interface with “n” and “p” types of conductivity was taken into account. The different degree of regulation of their surfaces that contribute to the concentration of charge carriers and dislocations of imperfections in the crystal lattice of materials. In this case, thermionic, field and thermal field emissions were formed, accompanied by emerging metal shunts. As for the Fermi energy level, it affects the surfaces in the middle and in the depth of the band gap, near the edge of the valence band, as well as the resulting shift at the edge of the conduction band. All of these factors were under the influence of impulse specific loads and energy load, which contributed to the generation of electric currents of various magnitudes and directions along with alternating thermal currents.

 

 

4. PROSPECTS FOR THE USE OF MAGLEV TRAINS IN AZERBAIJAN

 

H.M. AHMADOV¹, E.K. MANAFOV², M.M. NASIROVA², F.H. HUSEYNOV²

¹ Azerbaijan Technical University (Husein Javid ave. 25, Baku, AZ1073, Azerbaijan)

²Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

 

 

DOI: 10.52171/2076-0515_2022_14_03_41_53

 

Abstract

The article examines the existing problems of passenger transportation in urban and suburban transport. A comparative analysis of trains with a magnetic cushion with various modes of transport is given. The history of the development of magnetic trains is given, the principle of operation of the EMC electromagnetic suspension system, the EMF electrodynamic suspension system and the permanent magnet system are considered. The advantages and disadvantages of magnetic trains are studied, the investment costs for this type of transport are analyzed. In addition to the noted obstacles that may arise when using magnetic trains, taking into account the growing problems in the operation of ground vehicles in the country, they will allow timely and high-quality satisfaction of the population’s need for passenger transportation. In terms of a significant reduction in the intensity of traffic in the land transport sector in the country and the harmful compounds that they disperse into the environment, it is proposed to use these trains in the future in Azerbaijan.

 

 

2022, Vol. 14. № 4

 

1. CROSSWIND APPROACH AND LANDING, ITS SOFTWARE APPLICATION

 

I.M. ISMAYILOV, U.V. HABIBULLAYEVA

Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

 

 

DOI 10.52171/2076-0515_2022_14_04_14_20

 

Abstract

In the article, as a result of the examination of the available navigation data on the specific characteristics of the processes of approaching and landing a safe place in crosswind conditions, appropriate ways and methods are shown to avoid the danger that may occur in order to ensure safety at each stage of the landing process. Appropriate software has been developed for the purpose of ensuring safety in the mentioned stages for the practical implementation of the researches and proposed methods. The developed software helps users (pilots) to avoid deadlocks during landing, as well as to increase their level of professionalism, so that during the implementation of the program, users can gain experience in this direction, and during training in the training centers of aviation specialists, this software tool, like other software products, can be used. they can also check their knowledge with the committee.

 

 

 

2. PROTECTION OF BIOMETRIC INFORMATION IN THE FRAMEWORK OF AVIATION SECURITY PROCEDURES

 

D.I. LOBODA

Azerbaijan National Aviation Academy (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

 

DOI 10.52171/2076-0515_2022_14_04­_21_28

 

Abstract

One of the modern systems capable of countering the threat of terrorism in the air transport is a biometric identification system. An important issue in improving the aviation security system is also a protection of the biometric information and the biometric systems. The methodological basis of study, conducted in this article, is the analysis of mathematical models of the biometric identification systems. The application of software and hardware systems for the protection of biometric information is considered, and the main methods for identifying parameters and patterns of biometric identification are analyzed.

 

 

2. MASTERING THE PRODUCTION OF HOT-DEFORMED CASING FROM 32Г2 STEEL AT “BAKU STEEL COMPANY” LTD

 

A.T. MAMEDOV¹, A.I. BABAEV¹, N.SH. ISMAILOV¹,

M.CH. HUSEYNOV¹, F.T. GULIYEV²

¹ Azerbaijan Technical University (H. Javid ave. 25, Baku, AZ 1073, Azerbaijan)

² Baku Steel Company (15 Mir-Jalal (Darnagul), Baku, AZ 1029,  Azerbaijan)

 

 

DOI 10.52171/2076-0515_2022_14_04_48_55

 

 

Abstract

The results of studies on the development of the production of casing pipes with a size of 114×7.4 mm from the steel 32Г2 according to GOST 31446-2017, ARI 5ST 10 edition, accuracy class 1 strength group H40 at  “Baku Steel Company” Ltd are presented. In an electric arc furnace, several batches of steel graded 32Г2 were smelted from a charge consisting of metal waste and about 20% of metallized HBI pellets. Then, pipe blanks with a diameter of Ø130 mm were cast on a continuous casting machine (CCM). From these blanks, casing pipes with an outer diameter of  Ø117 and a wall thickness of  7.4 mm were rolled on a piercing and rolling machine. After hot rolling of tubular billets, the casing pipes were subjected to thermal hardening. The tubes were heated in a continuous sectional furnace to the quenching temperature, then they were cooled with water from the outer surface, in a sprayer, and then subjected to tempering when leaving the furnace, i.e. there was a self-release with subsequent warm calibration and editing. When using low-alloy steel, the developed technology provides uniform structures and properties of the metal along the wall thickness. The strength class of casing pipes made of the steel 32Г2 corresponds to 1, and the strength group is H40.

 

 

3. INCREASİNG THE EFFİCİENCY OF OİL TRANSPORTATİON AND GATHERİNG TECHNOLOGY BY APPLİCATİON OF BAF-1 AND BAF-2 NANOREAGENTS AT “SİYAZANNEFT”

 

B.T. USUBALİEV, F.T. MURVATOV, V.H. NURULLAEV, N.I. MAMMADOVA

Azerbaijan State University of Oil and Industry (Azadlig ave. 16/21, Baku, AZ1010, Azerbaijan)

 

 

DOI 10.52171/2076-0515_2022_14_04_69_76

 

Abstract

The article studies the features of the influence of a number of additives on the composition of crude oil and formation water in order to increase the efficiency of the oil gathering system at the OGPD Siyazanneft. Also, under laboratory conditions, the degree of influence on the remaining physical and chemical characteristics of oil was studied and the need to use 0,5% waste composite in the alkaline diesel fraction (ALF) of mixtures of nanostructured polycrystalline powders BAF-1 and BAF-2, taken in the same proportion, was substantiated. The efficiency in the oil of the proposed composition was determined by comparing the experimental results with the addition of individual amounts of Alkan DE318 reagent and nanostructured polycrystalline mixtures of reagents.

 

 

 

2023, Vol. 15. № 1

 

1. Cİ­Vİ­LİAN USE OF UN­MAN­NED AE­RİAL VE­HİC­LES (UAV) AND TH­REAT

TO DA­TA PRİ­VACY

 

SH.S. ALİ­ZA­DA

Azer­bai­jan Na­tio­nal Aca­demy of Avia­tion (Mar­da­kan ave. 30, Ba­ku, AZ1045, Azer­bai­jan)

 

DOI 10.52171/2076-0515_2023_15_01_7_15

 

 

Abst­ract

The ar­tic­le exa­mi­nes the in­he­rent be­ne­fits of ci­vi­lian use of un­man­ned ae­rial ve­hic­les (UAVs) and the pos­sib­le vio­la­tion of fun­da­men­tal rights such as the right to pri­vacy and free­dom of exp­res­sion. The ar­tic­le desc­ri­bes the pos­si­bi­lity of using UAVs at the da­ta col­lec­tion sta­ge using the examp­le of Is­rae­li law as a ba­sis for over­co­ming the risks as­so­cia­ted with the use of UAVs. Is­rael is con­si­de­red the lea­ding ma­nu­fac­tu­rer of UAVs, and the­re­fo­re the in­teg­ra­tion of the Is­rae­li le­gal sys­tem in­to both com­mon and ci­vil law is att­rac­ting at­ten­tion to­day. The ar­tic­le al­so dis­cus­ses the so­lu­tion of such prob­lems adop­ted in the USA and Eu­ro­pe.

 

 

2. LAUNCHING SATELLITES FOR EARTH RADIATION MONITORING USING

LOW-THRUST ENGINES

 

T.H. MAMMADZADA

Azerbaijan National Academy of Aviation (Mardakan ave. 30, Baku, AZ1045, Azerbaijan)

 

 

DOI 10.52171/2076-0515_2023_15_01_16_25

 

Abstract

This article studies various scenarios of the launch of satellites using an electric propulsion system into predetermined orbits for the purpose of study of the Earth’s radiation belts. The parameters of various scenarios of the group satellite launch are calculated – considering both the form of ridershare launch of a satellite and the clustered launch of two satellites into specified elliptical orbits for the Earth radiation monitoring. The satellite launch scheme assumes successive delivery of satellites with the help of a space tug, previously launched into a base circular orbit and equipped with an electric rocket propulsion system. The problem of the spacecraft flight trajectory optimization with low thrust under the condition of minimization of the flight time is solved using the maximum principle of Pontryagin. Using the modified Newton’s method, the boundary value problem is transformed to the Cauchy problem, the solution of which is found by numerical integration of a system of ordinary differential equations. The results obtained demonstrate the technical feasibility of the problem of satellites launch into specified orbits using low-thrust engines.

 

 

3. INF­LUEN­CE OF GEO­MET­RIC PA­RA­ME­TERS OF THE LAN­DING GEAR ON THE CEN­TER OF GRA­VITY OF THE AIRC­RAFT

 

E.A. AG­HA­YEV

Azer­bai­jan Na­tio­nal Aca­demy of Avia­tion (Mar­da­kan ave. 30, Ba­ku, AZ1045, Azer­bai­jan)

 

DOI 10.52171/2076-0515_2023_15_01_26_33

 

Abst­ract

The ar­tic­le exa­mi­nes the inf­luen­ce of geo­met­ric pa­ra­me­ters of lan­ding gear on the cen­ter of gra­vity of the airc­raft. It is found that the geo­met­ric pa­ra­me­ters of the lan­ding gear di­rectly af­fect the disp­la­ce­ment of the cen­ter of gra­vity of the airc­raft. A mat­he­ma­ti­cal re­la­tions­hip is es­tab­lis­hed between the weight and cen­ter of gra­vity of the airc­raft. The inf­luen­ce of chan­ges in the geo­met­ric pa­ra­me­ters of the lan­ding gear on the cen­ter of gra­vity and weight of the airc­raft is shown in the MAT­LAB Si­mu­link softwa­re pac­ka­ge.

 

 

 

4. UN­DIS­TUR­BED UNI­VER­SAL PEN­DU­LUM DE­VI­CE FOR DE­TER­MI­NING

SPA­TIAL PO­SI­TION OF AIRC­RAFT

 

T.I. KA­RIM­LI

Azer­bai­jan Na­tio­nal Aca­demy of Avia­tion (Mar­da­kan ave. 30, Ba­ku, AZ1045, Azer­bai­jan)

 

 

DOI 10.52171/2076-0515_2023_15_01_34_42

 

Abst­ract

 

The ar­tic­le gi­ves a re­view of de­vi­ces for de­ter­mi­ning the spa­tial po­si­tion of sta­tic and dy­na­mic ob­jects for va­rious pur­po­ses, and prin­cip­les of their ope­ra­tion are in­ves­ti­ga­ted. The sta­te of a dis­tur­bed clas­si­cal pen­du­lum in de­ter­mi­ning the spa­tial po­si­tion of ob­jects un­der the inf­luen­ce of ac­ce­le­ra­ting mo­tion and the clas­si­cal so­lu­tion to eli­mi­na­te the im­pact of the di­tur­ban­ce are con­si­de­red. Va­riants of an un­dis­tur­bed uni­ver­sal-pur­po­se mec­ha­ni­cal pen­du­lum are pre­sen­ted.