Autor: Żyluk, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The testing of operating characteristics of cluster air weapons
Badania charakterystyk eksploatacyjnych lotniczych środków kasetowych
Autorzy:: Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/281504.pdf
Data publikacji:: 2007
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: lot dynamiczny
broń kasetowa
flight dynamics
cluster weapon
Opis:: In the paper, a general model for investigations of dynamical properties of cluster air weapons is presented. Flight tests were carried out in a research-development cycle. Results of simulation studies, preliminary tests in aerodynamical tunnel and in flight examination are presented. The mathematical model was verified through experimental flight tests.
W pracy przedstawiono ogólny model badań własności dynamicznych lotniczych środków kasetowych. Umiejscowiono doświadczalne badania w locie w cyklu prac badawczo-rozwojowych. Zaprezentowano wyniki badań symulacyjnych, badań doświadczalnych w tunelu aerodynamicznym i w locie. Model matematyczny zweryfikowano eksperymentalnymi badaniami w locie.
Źródło:: Journal of Theoretical and Applied Mechanics; 2007, 45, 4; 819-832
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Experimental validation of mathematical model describing external stores separation
Eksperymentalna walidacja matematycznego modelu opisującego proces odejścia podwieszenia z nosiciela
Autorzy:: Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/279308.pdf
Data publikacji:: 2005
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: external stores separation
aerodynamics interference
dynamics of aerial munitions
Opis:: This work is concerned with concepts and some results regardine the problem of aerodynamic interference in the system. The main emphasis is put on a practical, cost-effective engineering solution to this complex problem with reasonable computational efficiency allowing a code to run on PC computers. Prediction of separation trajectories of external stores is an important task in the aerodynamic design area having the objective to define operational release envelopes. To attain this purpose, a technique based on the Non-linear Panel Method with an unsteady free wake formulation has been developed. The comparison with a flight test as well as wind tunnel investigations has proved the reliability of this methodology.
W pracy przedstawiono ogólny model badań własności dynamicznych bomb lotniczych. Główny nacisk położono na praktyczne rozwiązanie złożonego problemu oddzielenia podwieszeń od nosiciela z uwzględnieniem interferencji aerodynamicznej. Opracowane algorytmy i programy komputerowe pozwalają na rozwiązanie tego zagadnienia na komputerach klasy PC. Model matematyczny zweryfikowano badaniami w tunelach aerodynamicznych i badaniami doświadczalnymi w locie.
Źródło:: Journal of Theoretical and Applied Mechanics; 2005, 43, 4; 855-873
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Sensitivity of a bomb to wind turbulence
Wrażliwość bomby na turbulencje wiatru
Autorzy:: Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/279357.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: bomb release
atmospheric turbulence
Opis:: This paper presents results of numerical investigations into the bomb release in a turbulent wind field. Short descriptions of mathematical models of both the bomb dynamics and the stochastic wind are shown. The effect of parameters of the turbulent wind field on a random distribution of points of the impact is investigated.
W pracy przedstawiono wyniki numerycznej symulacji wpływu turbulencji wiatru na zrzut bomby. Praca zawiera opis matematyczny dynamiki lotu bomby oraz stochastycznego pola wiatru. Badano zależność pomiędzy parametrami turbulencji i punktem upadku bomby.
Źródło:: Journal of Theoretical and Applied Mechanics; 2009, 47, 4; 815-828
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Numerical simulation of the effect of wind on the missile motion
Autorzy:: Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/281167.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: unguided missile
modeling
simulation
external ballistics
Opis:: The paper presents a model of the missile dynamics and the impact of the wind field thereon. Sample results of numerical simulation of the missile flight across the wind field are given and conclusions drawn.
Źródło:: Journal of Theoretical and Applied Mechanics; 2014, 52, 2; 335-344
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Sensitivity analysis for dynamic models of aerial munitions
Autorzy:: Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/243173.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: aircraft
air combat means
dynamic properties of aerial bombs
conditions on the aerial bomb’s flight path
trajectory of aerial bombs
Opis:: While investigating dynamic properties of aerial bombs, both the analytical and experimental outcome often find their applications. Analysis of how a series of changes in flight parameters affect flight dynamics is probably one of the most essential efforts throughout this study. Numerical solutions of equations of motion deliver no information on the effect of changes in the aerial bomb’s design parameters on flight characteristics thereof. Therefore, the theory of sensitivity has been used in the paper to investigate the effect(s) of external disturbances, drop/release conditions and technical parameters on the aerial bomb’s range and flight path. Among other, the elements of the theory of sensitivity, equations of motion, numerical analysis of sensitivity of the bomb-describing mathematical model to changes in some selected parameters, numerical analysis of sensitivity of the bomb-describing mathematical model to changes in some selected parameters, analysis of the effect of changes in drop/release conditions on the aerial bomb’s flight path, analysis of the effect of changes in engineering (design) parameters of the aerial bomb on the trajectory thereof, effect of drop conditions on the aerial bomb’s range, effect of drop conditions on the side deflection of the aerial bomb’s trajectory are presented in the paper.
Źródło:: Journal of KONES; 2013, 20, 4; 517-523
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Metody badań lotniczych środków bojowych
Methods of testing and reseach works on the ordnance used by the air forces
Autorzy:: Żyluk, A.
Długołęcki, A.
Powiązania:: https://bibliotekanauki.pl/articles/235506.pdf
Data publikacji:: 2006
Wydawca:: Wojskowy Instytut Techniczny Uzbrojenia
Tematy:: środki bojowe lotnicze
pociski rakietowe
air munitions
missiles
Opis:: Lotnicze środki bojowe (l.b) są przedmiotem ciągłych badań w całym okresie ich istnienia tzn.: cyklu prac projektowania i rozwoju; podczas badań odbiorczych przy produkcji seryjnej; w ramach bieżącej eksploatacji; po okresie gwarancyjnym. Praktyka eksploatacyjna wykazuje, że dla tego typu wyrobow niezbędne są ekspertyzy techniczne i badania w zakresie przedłużania resursu technicznego. Szeroka gama badanych wyrobów wymusza różnorodność stosowanych metod badań i kryteriow oceny. Badanie te przynoszą wymierne korzyści finansowe użytkownikowi, będące wynikiem przedłużenia okresów używalności sprzętu. Stanowią źrodło wielu cennych doświadczeń i pomysłów dla badaczy, ktore mogą być wykorzystywane przy realizacji nowych własnych rozwiązań.
The ordnance used by the Air Forces are subjected to the continuous process of research and testing works during its service life beginning from the design and development phase through the acceptation tests when manufactured and the periodical tests in the postwarranty time. The experience shows that these articles must be subjected to technical expertise works and tests on the prolongation of their service life and the large quantity of these articles creates the need for use of wide range of different testing methods and evaluation criteria. These tests make potential savings are possible for the user by the prolongation of the service life and on the other hand they provide the valuable data to the designers and researchers for new developments.
Źródło:: Problemy Techniki Uzbrojenia; 2006, R. 35, z. 97; 163-175
1230-3801
Pojawia się w:: Problemy Techniki Uzbrojenia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Influence of atmospheric turbulence on bomb release
Wpływ turbulencji atmosferycznych na zrzut bomby
Autorzy:: Kowaleczko, G.
Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/280204.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: atmospheric turbulence
bombing
Opis:: A model of the bomb release dynamics is presented in the paper, and how it is influenced by a wind field. The applied way of describing this field is discussed with account taken of its stochastic nature. Exemplary results of a numerical simulation of bombing are submitted and concluded.
W pracy przedstawiono model dynamiki zrzutu bomby. Pokazano wpływ pola wiatru na szybowanie bomby. Strukturę wiatru opisano, uwzględniając jego stochastyczny charakter. Pokazano wyniki symulacji numerycznej zrzutu oraz poddano je analizie.
Źródło:: Journal of Theoretical and Applied Mechanics; 2009, 47, 1; 69-90
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Feasibility of measurements in examination of air weapons
Autorzy:: Żyluk, A.
Pietraszek, M.
Powiązania:: https://bibliotekanauki.pl/articles/243450.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: aircraft
air combat means
flight tests of combat means
data recorders for parameters of air combat means
avionic bombs
on-line data transmission systems
Opis:: Specific features of air weapons, dynamic examinations as an important component of the investigation process, examples of data recorders for parameters of the combat mean under test, telecommunication system for on-line data transmission with the assumption that the system should be composed of components and subassemblies that are commercially available from the market, system for RF transmission of flight parameters in the real time mode are presented in the paper. The system is made up of a transmitter and rpm sensors embedded into the head of the S-7 uncontrolled missile. Signals from the telecommunication module are received and decoded by means of a transducer with the sensitivity of about 2PV and stored in the memory of the TDS 3020 digital oscilloscope from Tektronix as well as in a four-channel digital recorder. The data acquisition system is triggered at the moment when the transmitter installed on the missile head was switched on. The missile was launched several seconds later. The paper includes among others workflow for examination of combat means, composition of measuring instruments for flight tests, data recorders for flight parameters installed on avionic bombs, signal waveforms recorded from rotation sensors and rotation speed variations for the S-7 missile during the flight
Źródło:: Journal of KONES; 2013, 20, 3; 451-460
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Investigation of an additional oxidizer charge effect on selected operational characteristics of a solid-fuel rocket engine
Autorzy:: Żyluk, A.
Pietraszek, M.
Powiązania:: https://bibliotekanauki.pl/articles/279874.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: oxygen balance
rocket engine
aircraft
experimental examination
oxidizer charge
Opis:: The paper has been intended to discuss some issues closely related to the elimination of an extremely disadvantageous phenomenon, i.e. the occurrence of a negative oxygen balance in products of combustion emitted by a solid-fuel rocket engine while launching a missile from the aircraft. Findings of experimental examination of such engines furnished with an additional oxidizer charge have also been presented.
Źródło:: Journal of Theoretical and Applied Mechanics; 2014, 52, 1; 139-149
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Method for estimating the static friction degree in the slide pair of the miniaturised electrohydraulic servomechanism
Autorzy:: Ułanowicz, L.
Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/245112.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: operation
hydraulic drive
electrohydraulic servomechanism
pressure
friction force
Opis:: One of the most important parameters specifying the usability of the miniaturised electrohydraulic servomechanism includes a static friction degree in its slide pairs, i.e. resistance of the slider’s movement from rest after some time of its staying at rest under pressure. Therefore, at the stage of designing and construction of the electrohydraulic servomechanism, it is important to determine the greatest static friction degree, which may arise in the slider hydraulic pair of this device during its operation. The objective of this article is to present a method for estimating the maximum static friction values in the slide pair based on the extreme value theory. The operation and loading conditions of the slide pair of the electrohydraulic servomechanism for the unmanned aircraft control system were described. The procedure for estimating the maximum static friction degree in the slide pair with the use of the extreme and probabilistic grid was presented. The extreme and probabilistic grid structure was based on the Gumbel probability graph. The graphic presentation of results of the static friction experimental studies in the slide pair on the extreme and probabilistic grid was discussed. By using the graphics method, the empirical dependence of the static friction force in the slide pair on the working fluid pressure in the hydraulic drive (loading conditions) was determined. A practical example of estimating the maximum values of the static friction force that may occur in the slider hydraulic pair of the miniaturized electrohydraulic servomechanism is shown.
Źródło:: Journal of KONES; 2018, 25, 2; 399-407
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Development of mathematical model for the autonomous gliding delivery system
Autorzy:: Loroch, L.
Sibilski, K.
Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/235504.pdf
Data publikacji:: 2006
Wydawca:: Wojskowy Instytut Techniczny Uzbrojenia
Tematy:: modele matematyczne
mathematical models
Opis:: For parafoil and payload aircraft, control is affected by changing the length of several rigging lines connected to the outboard side and rear of the parafoil leading to complex changes in the shape and orientation of the lifting surface. Flight mechanics of parafoil and payload aircraft most often employ a 6 or 9 DOF representation with the canopy modeled as a rigid body during flight. The effect of control inputs usually is idealized by the deflection of parafoil brakes on the left and right side of the parafoil. This work focused on description of a 9 DOF parafoil and payload aircraft simulation model.
Źródło:: Problemy Techniki Uzbrojenia; 2006, R. 35, z. 97; 149-162
1230-3801
Pojawia się w:: Problemy Techniki Uzbrojenia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Experimental studies of leading edge vortex control of delta wing micro aerial vehicle
Autorzy:: Sibilski, K.
Żyluk, A.
Wróblewski, W.
Powiązania:: https://bibliotekanauki.pl/articles/246620.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: MIcro Aerial Vehicles
unconventional control effectors
Opis:: It is known, that small disturbances generated by the micro actuators can alter large-scale vortex structures, and consequently, generate appreciable aerodynamic moments along all three axes for flight control. In the current study, we explored the possibility of independently controlling these moments. We perform analytical simulations showing optimal position of LEX generators, and water tunnel measurements showing effectiveness of MEX generators as MAV control devices. We applied array of actuators located on either the forward or the rear half section of the leading edge. Both one- and two-sided control configurations have also been investigated. Experimental results showed that asymmetric vortex pairs were formed, which leads to the generation of significant torques in all three axes. The article presents typical vortical flow over a delta wing, water tunnel at Wroclaw University of Technology, experimental setup and procedures, static test results on water tunnel testing including normal forces, pitching and yawing moments, maximum values of rolling, pitching, and yawing moment coefficients, effectiveness of pitching and yawing control.
Źródło:: Journal of KONES; 2018, 25, 3; 393-402
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Experimental study and neural network modelling of aerodynamic and dynamic characteristics of flapping wings micro aerial vehicle
Autorzy:: Czekałowski, P.
Sibilski, K.
Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/242331.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: entomopter
flapping wings
aerodynamics
neural network
modelling
aerodynamika
sieć neuronowa
modelowanie
Opis:: The article is close connected with building flying object, that fly like an insect (entomopter). Present work concerns on concept of aerodynamic model using artificial neural networks. Model is used in simulations of flight of entomopter. Aerodynamic model based on experimental data. Necessary data are taken from experiment performed in water tunnel on entomopter model. For this case dynamic test are required. Measurements are ducted during sinusoidal motion of whole model. Modelled object is dipterous. Each wing can perform various spherical motions (wing is rotated around point). The motion of the wing in this case was two-dimensional; it was rotated around two axis. As a model, specially trained neural network is used. For training are used data from measurement. Presented in this article approach is based on artificial neural networks. In this article, innovative concept of model, describing unsteady aerodynamics of entomopter was proposed. It was shown that it could be easily implemented as mathematical model. Unsteady effects related to many state variables can be easily captured. Model can be easily adopted to predict different states of flight by networks training on appropriate data. Test has to reproduce real conditions as close, as it is possible. In reality, it is challenging to design test that will reproduce similar motion.
Źródło:: Journal of KONES; 2018, 25, 4; 49-57
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Modelling of physical phenomena in the vertical velocity measuring circuit for process of designing the SWPL-1 helmet-mounted display system
Autorzy:: Michalak, S.
Żyluk, A.
Szelmanowski, A.
Borowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/243481.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
avionics
helmet-mounted display systems
error
vertical velocity measurement
Opis:: The article presents the selected methods of identifying static and dynamic properties of the measuring paths to the extent necessary for the proper integration of on-board systems with the helmet-mounted flight parameter display system. It presents the methods of identifying static and dynamic properties of the WR-10MK on board variometer as one of more difficult identification elements. Its identification was carried out on the basis of the basic dependencies of the International Standard Atmosphere and the instruments construction’s parameters. It built a mathematical model describing the physical phenomena associated with vertical speed measurement. This model differs from the models found in the literature in terms of detail and description accuracy. On this basis, in the Simulink environment, it built a simulation model corresponding to its mathematical model. The non-linear model was the starting point for the construction of the linearized model based on the operator transmittance. The developed models were evaluated for errors of vertical speed’s dynamic indications. This allowed assessing the usefulness of the individual models for further works on ensuring the correlation of indications of the on-board variometer and the SWPL-1 helmet-mounted flight parameter display system. The presented simulation models include design details, as well as the characteristics of technological errors and disturbances of a stochastic nature. Another approach to the issue of identification is to use the characteristics provided by the manufacturer in the form of approximate characteristics of a module.
Źródło:: Journal of KONES; 2018, 25, 4; 277-284
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Experimental analysis of aerodynamic performance of flapping wings nano aerial vehicles
Autorzy:: Czekałowski, P.
Drewniak, T.
Sibilski, K.
Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/243431.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: aerodynamic performance
flapping wings micro aerial vehicles
water tunnel measurements
Opis:: The aerodynamics of flapping wings is ultimately concerned with the relation between motion kinematics and the time-history of aerodynamic forces and moments. However, an important intermediate quantity is the evolution of the flow field – and in particular of flow separation. Nature’s solution to large time-varying pressure gradients, for example those due to aggressive motions, is to form and eventually to shed vortices. We are interested in understanding and exploiting these vortices – for example, in delaying vortex shedding to promote lift in situations where flow separation is in any case inevitable. From the engineering viewpoint, the question is to what extent closedform models and conventional numerical/analytical tools can estimate the aerodynamic force history, with an eye to eventually running large parameter studies and optimizations. Our paper contains results of water tunnel experiments on flapping wings aeromechanics. The idea of investigation is to optimize the wing trajectories, and to find methods providing stability and control. In the paper, we present, also, conception and methodology of tests. The investigation is dividing into two parts: preliminary and principal tests. The aim of initial part is to extract quasi – state characteristic for wings of different platforms shapes. This characteristic will be used to generate initial kinematics of movement of wing. It will be initial point of further tests. The purpose of the main experiment is to find the best way of movement for wing taking account all of unsteady phenomena (interaction between vortices, wing – wing interference, etc.). Finally, we want to identify efficient way of controlling nano-microelectromechanical flying insect (entomopter).
Źródło:: Journal of KONES; 2014, 21, 3; 47-57
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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