Wszystkie pola: rybak, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The analysis of chosen technological parameters in the process of manufacturing components of landing gear of structural post aircraft
Autorzy:: Boś, P.
Hakim, M.
Budzik, G.
Rybak, M.
Powiązania:: https://bibliotekanauki.pl/articles/950100.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
aviation
landing gear
measuring method
engineering
Opis:: High quality of components used in constructions of Landing Gears forces the manufacturers to choose appropriate technologies in order to manufacture and control dimensions of particular details. It is especially difficult to predict how the elements of huge dimensions will act during heat treat and chemical processing. The changes in size and. shape of the elements of suspension of STRUCTURAL POST aircraft are connected with hardening stresses. This requires accurate determining of allowance of final machining. The analysis of processing parameters and manufacturing of a precise component is possible with the use of high-tech coordinate measuring techniques based on touch and untouched measurements . The highest quality of machines used in manufacturing and measuring as well as innovative technologies used during the process of manufacturing STRUCTURAL POST components result in effects assumed by the designing engineer. The aim of this article is to present issues connected with technological process of manufacturing STRUCTURAL POST components as well as the analysis of particular parameters of manufacturing process which have an impact on the accuracy of dimensions and shape of the final product. These parameters are also responsible for functionality, operational reliability and safety of the Landing Gear.
Źródło:: Journal of KONES; 2013, 20, 1; 23-28
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Determination of common rail injector flow characteristics with the use of diesel and biodiesel fuels
Autorzy:: Rybak, A.
Gęca, M.
Krzaczek, P.
Mazanek, A.
Powiązania:: https://bibliotekanauki.pl/articles/247692.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: fuel
oil
lubrication
engine
injector
biodiesel
Opis:: One of the most important requirements in the design of diesel combustion systems is to reduce emissions of harmful chemical compounds contained in exhaust gases. Solution to this problem is sought by the use of advanced engine injection systems and accurate control of mixture formation inside a cylinder via split fuel injection. The differences in physical characteristics between traditional and alternative fuels can affect fuel metering, especially at short injection durations. Thus, the aim of the current study was to identify dynamic flow parameters of the Common Rail injector with the use of different fuels. The study involved Diesel available in retail and biodiesel fuel obtained by methyl esterification of fatty acids. Measurements were performed on a test stand designed for determination of injectors and injection pumps characteristics. Studies were carried out changing the following parameters: injection pressure in the range of 30-180 MPa, injection time in the range of 200-1600 microseconds. Each fuel was tested at temperature 40 and 60°C. The obtained test results showed that injection of different fuels provided variable amounts of fuel injected at short injection durations, which can affect mixture formation process as well as combustion. Effect of the dose of the injected fuel has a viscosity of used fuel.
Źródło:: Journal of KONES; 2016, 23, 4; 443-450
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Reduction of pressure rise rates in boosted HCCI engine using advanced valve actuation strategies
Autorzy:: Hunicz, J.
Rybak, A.
Gęca, M.
Powiązania:: https://bibliotekanauki.pl/articles/243727.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: low temperature combustion
HCCI
valve actuation
combustion harshness
Opis:: Homogeneous Charge Compression Ignition (HCCI) is a promising low temperature combustion technology which offers high fuel efficiency and extremely low exhaust emissions. However, there are still some pending issues to be resolved before the technology will achieve mass production level. Namely, combustion controllability should be improved and HCCI operating range should be widen. The latter is constrained by excessive combustion rates under high loads. In this study, advanced variable valve actuation strategies were applied to control auto-ignition timings and combustion rates. The examinations were conducted using single-cylinder research engine fuelled with directly injected gasoline. The HCCI combustion was achieved using negative valve overlap technique. The engine was run under boosted conditions, in an operation regime where acceptable pressure rise rate (PRR) level is usually exceeded. Selected valve timing sweeps were carried out within a scope of the experiments to evaluate PRR reduction potential. The obtained results manifested superior combustion controllability. Late exhaust valve closing enabled reduction of the amount of internally re-circulated exhaust, which propagated to the main event combustion. From the intake side, two effects were observed, i.e. variability of the intake air aspiration and variability of the apparent compression ratio. Both phenomena were found to affect combustion timings and rates.
Źródło:: Journal of KONES; 2018, 25, 4; 369-376
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Research on the effectiveness of the innovative protective structure for vehicles
Autorzy:: Borkowski, W.
Rybak, P.
Hryciów, Z.
Starczewski, L.
Gmitrzuk, M.
Szcześniak, K.
Powiązania:: https://bibliotekanauki.pl/articles/243785.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: structure
dynamical loads
experimental research
numerical research
Opis:: This article presents results of the research on developed innovative protective structure for vehicles. The fundamental objective of executed work was to check the correctness of assumed assumptions, shape and geometry of the solution and configuration of components that affect the protective effectiveness during the impact of the explosive. In order to reach that goal, both model tests and experimental tests were carried out. The experimental tests were carried out on the real object. Significant information about the level, directions and nature of affecting dynamic loads were obtained as well as information about their impact on particular structure elements. The MES numerical model of the research object has been developed in LS-Dyna system. Special emphasis was placed on the mapping of complex geometry, configuration of components and their interactions. Test calculations were carried out and then the resistance calculations were made. As a load, generating post-explosion impact wave, the load imposed by normative requirements concerning the way of explosive arrangement as well as the shape and weight. The analysis of obtained results of the experimental and numerical tests allows for high evaluation of effectiveness of proposed solution.
Źródło:: Journal of KONES; 2015, 22, 1; 29-36
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The methods of quality assessment of the tracked suspensions of the combat vehicles
Autorzy:: Rybak, P.
Hryciów, Z.
Michałowski, B.
Wiśniewski, A.
Wojciechowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/243485.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: tracked combat vehicle
suspension
driving smoothness
test track
Opis:: The extortions that result in the vibrations of a hull of the combat vehicle have an impact on the tracked combat vehicle during the off-road driving. They may have a negative impact on the crew, internal equipment, shooting accuracy. A level of the hull loads depends on quality of the suspension system, which main responsibility consists in minimising an amplitude of the vibrations. Therefore, it is necessary both to improve a structure of the suspension system, and its components, as well as their optimisation. The tests of the driving smoothness of the vehicle and quality of the suspension elements can be realised both within a frame of the model tests and while driving in the real conditions. The assessment criteria of the driving smoothness are directly related to the negative influence of the vibrations to the human body. The suspension quality should be assumed both upon an execution of the vehicle prototype, and during the design or modernisation phase. It results both in reducing the time, and minimisation of the costs and risk related to the structure development. The model tests enable to evaluate the driving smoothness and comfort prior to an execution of the prototype. The tests on the test tracks in the final phase of the development are carried out in order to evaluate the driving smoothness.
Źródło:: Journal of KONES; 2018, 25, 4; 471-478
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Mathematical model of stabilising and tracking control system in main battle tank
Autorzy:: Borkowski, W.
Hryciów, Z.
Papliński, K. M.
Rybak, P.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/244961.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: main battle tank
stabilising and tracking control system
tank gun stabiliser
Opis:: The aim of this researches was to identify all functional blocks of tank gun stabiliser 2E28M (installed in tanks T-72 and PT-91 Twardy) in order to build mathematical model of the system. The tank gun stabiliser is an electro-hydraulic control system, which makes possible aiming at a target, tracking of a target and stabilise of a given gun and turret angular position. The two-axial stabiliser consists of two separate control systems to stabilise the gun in elevation and the turret (with gun) in azimuth. After detailed analysis of construction and work principles, functional schemes of investigated systems were build. Afterwards, static and dynamic characteristics of functional parts of the system were determined. Because of obtained characteristics and based on the knowledge about the system feedbacks, structural schemes and mathematical models of foregoing stabiliser were derived. The results of numerical computations were compared with the existing results of experimental tests carried-out on a real plant. The results of experimental and model simulation investigations showed that the mathematical model and its numerical implementation were correctly developed.
Źródło:: Journal of KONES; 2015, 22, 4; 43-52
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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