Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Kowalski, M" wg kryterium: Autor

  Lista filtrów

Dostawca treści

Podbaza

Wyrównaj
Wyświetlanie 16-30 z 462
Tytuł:
Use of data from on-board data recorders for acceptance tests of avionic driving units
Autorzy:
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/243070.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diagnostics of aircraft engines
qualification tests for avionic driving units
Opis:
The paper explains how information stored in on-board recorders of flight parameters can be used for acceptance tests, also referred to as qualification tests. The disclosed example refers to the An-28 ‘Bryza’ aircraft where an old airscrew was substituted with the new generation Hartzell airscrew of the HC-B5 MP-3D type. The airscrew is an integral part of the driving system for the airscrew propelled aircraft that is provided with the TWD-10B engine. After revamping of the airscrew, the aircraft was named as TWD-10B/PZL-10S. The follow-up investigations were carried out with the aim to find out how much the airscrew substitution affected the alteration of key performance characteristics achieved by the driving unit of the aircraft. The investigations comprised both ground and in-flight tests and have led to determination of the essential characteristics for the engine operation as well as variations of the operational parameters in time. In some cases also so called phase portraits were found out for parameters of the engine operation so that to reflect dynamic properties of the engines. Such investigations are indispensable since the aircrafts are subject to operational limitations and technical conditions that must be mandatory fulfilled due to requirements of flight safety. The paper demonstrates that the data stored in on-board recorders of flight parameters can be really useful for execution of such acceptance (qualification) tests.
Źródło:
Journal of KONES; 2013, 20, 2; 201-206
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the phase reproduction method to the analysis of an avionic event on board of the W-3 "Sokół" helicopter
Autorzy:
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/244580.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
aircraft engine diagnostics
phase mapping of engine parameters
Opis:
This paper presents a new approach to the study of events/cases of the use of so-called air mapping phase. The examinations were carried out by means of the selective method on the basis of data for basic operational parameters acquired from the both driving units of the W-3 "Sokół" helicopter. The analysis covered quality of information received from the S2-3a on-board recorder of flight parameters, in particular its resolution and recording frequency. Then it was possible to plot waveforms for variation of the recorded parameters associated with operation of the helicopter engines and its rotor. The waveforms were used to determine the most important fragments suitable for detailed analysis of variations exercised by basic parameters and to check them against the Operation Manual for flights of the W-3 helicopter. The selected operation parameters were used for phase imaging (development of phase portraits), which served as the basis to assess dynamic properties of the parameters variations. The final component of the study consisted in discussion of the obtained results with presentation of conclusions. It is infeasible to monitor technical condition of the package joint between the transmission shaft and the PZL-10W aircraft. It is necessary to install additional sensors and gauges intended to improve accuracy and frequency of parameter readouts. Only sufficient amount of information shall enable application of the phase imaging method to efficient monitoring of technical and emergency operating conditions of aircraft engines.
Źródło:
Journal of KONES; 2011, 18, 1; 301-310
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of automotive vehicle braking system failure on driving safety
Autorzy:
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/244871.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
car diagnostics
braking system
driving safety
Opis:
The paper describes systems responsible for driving safety of vehicles weighing up to 3.5 t. It is focused on selected failures (fouling) of braking systems that are typical during motor cars operation. Simulation testing regarding effect of selected failures (fouling) of braking system elements on braking force and braking efficiency were performed. In order to perform such testing, author of the paper worked out the methodology of testing which is also described here. The test results (partial) are displayed as tables and charts. The negative effect of selected failures on braking force and braking efficiency index is influencing directly on motor cars driving safety. It is also emphasized that it is important to maintain and observe automotive manufacturers’ technical requirements regarding braking system elements such as tyre pressure, tyre tread condition, brake shoes wear, etc. Basing on the test results it is found that excessive wear of tyres and brake shoes wear could be the reason of significant WSH index decrease resulting in faulty car. This can be visible through lower than allowable level of braking efficiency index WSH, which is the basic legal diagnostic parameter of break system condition assessment. Replacing such elements significantly improves braking efficiency index WSH.
Źródło:
Journal of KONES; 2013, 20, 1; 147-153
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O sukcesji ekologicznej w lasach Jasienia
Autorzy:
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/821387.pdf
Data publikacji:
1993
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
sukcesja roslin
warunki siedliskowe
zmiany skladu gatunkowego
drzewostany sosnowe
sklad gatunkowy
lasy
Quercus
ekologia lasu
dab
Jasien
Lasy Rogowskie
Źródło:
Sylwan; 1993, 137, 09; 37-46
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Complex management system of the aviation training process
Autorzy:
Jemielniak, M.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/245390.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
aviation training system
pilot training
pilot education system
Opis:
This paper concerns the issue of management and assessment of the aviation training process, which takes into account the elements changing over time: the state of training, its level, quality and mechanisms rationalising the organisational activities and costs. The elements of the complex management system of the aviation training process, which includes probabilistic models for projecting the reliable, safe and effective aviation training, taking into account the requirements imposed by rules, standards and regulations of civil and military aviation, were discussed. In general, its structure, internal modules and exemplary tables of the analysis and assessment of the aviation personnel updates and the validity of permissible breaks during flight by aviation personnel. A schematic diagram of introducing the input data, main parameters, statistical data and expected results in the form of the training schedule, the schedule of the aircraft necessary moving, indicators of the training analysis and assessment, safety and reliability, were mentioned. The mathematical notations of input data and examples of the offered training indicator of aviation personnel were presented. The criterion global function, which exposes the maximisation of the aviation personnel training, as well as the maximisation of the performed flying time of a given type of aircraft, and the minimisation of operating costs of the specific aviation training, was determined. The paper was completed with a conclusion that shows the advantages of the proposed complex management system of the aviation training process.
Źródło:
Journal of KONES; 2016, 23, 3; 233-240
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical modelling of combustion process with the use of ANSYS FLUENT code
Autorzy:
Kowalski, M.
Jankowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/245622.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
liquid fuels
combustion processes
turbulent flow
combustion process model
ANSYS FLUENT
Opis:
The article presents the modelling of the combustion process of liquid fuels using professional ANSYS FLUENT software. This program allows modelling the dynamics of compressible and incompressible, laminar and turbulent flows as well as heat exchange phenomena with occurrence and without chemical reactions. The model presented in the article takes into account the influence of the gas phase on the liquid phase during the fuel combustion process. The influence of velocity and pressure of the flowing gas and the type of flow has a significant impact on the combustion of liquid fuels. The developed model is fully reliable and the presented results are consistent with experimental research. The occurrence of a laminar sublayer in a turbulent flow was confirmed, and the thickness of this layer and the turbulent layer significantly influences the course of the combustion process. The use of the flat flow model reflects the basic phenomena occurring during the combustion of liquid fuels under turbulent conditions. The use of the program for flows with different flow velocity profiles is justified. It gives important information about the processes taking place during the combustion of liquid fuels. The results of numerical tests are presented graphically. The article presents graphs of velocity field, absolute pressure, power lines, temperature and density.
Źródło:
Journal of KONES; 2018, 25, 4; 175-186
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of avionic events with use of information from on-board recorders of flight parameters
Autorzy:
Jemielniak, M.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/247002.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
investigation of avionic events
diagnostics of avionic driving systems
Opis:
The paper discloses opportunities of how information recorded by on-board recorders of flight parameters can be used for investigation of avionic events. An example of the methodical approach is presented of how to verify data acquired from flight recorders, which unambiguously indicates the feasibility of further investigation and analyses of avionic events that may happen to aircrafts. Subsequently the effect of the engine stall is outlined, which enables analysis of those avionic events when the effect of engine(s) stall took place. The paper discloses two cases of avionic events when engine stall was the underlying reason of problems, i.e. when a helicopter entered a stream of exhaust gases produced by a missile launched by that helicopter and when icing of the intake channel occurred in a turbojet engine installed on a helicopter. Investigations of that type are indispensable due to operation constraints and technical conditions of aircrafts operations, where meeting these conditions is the principal requirements in terms of flight safety. This study confirms that opportunities to use data from on-board recorders of flight parameters to find out what was going on with the aircrafts during avionic events are considerable.
Źródło:
Journal of KONES; 2014, 21, 1; 107-118
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Quantum Key as the Fiber Optic Security Sensor
Autorzy:
Życzkowski, M.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1399414.pdf
Data publikacji:
2013-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.30.Sy
02.60.-x
42.30.Tz
Opis:
The paper describes the methodology of identifying an interference in the optical fiber. The paper presents the technology widely known as quantum key distribution. The quantum key distribution is based on the technique of constant comparison of quantum characteristics of the input light source and its characteristics at the end of the fiber optic. Methodology of presented work includes the evaluation of the functional objectives through the constructive assumptions for the laboratory models development. This paper presents the model of a system based on the comparison of polarization states of light quanta using two asymmetric Mach-Zender interferometers as transmitting and receiving systems to enable compensation of polarization state changes at the input and output of the fiber optics sensing cable. Continuous monitoring of the state of the reference signal, the specific changes of natural or ambient effects on the fiber will attempt to identify interference in the optical waveguide as a change of the polarization of the quantum states of the light. The authors indicate the possibility of using such fiber optic sensor as a security sensor to protect the extensive critical infrastructure facilities. In this article the future research conception of using compressed sensing algorithms for data compression in quantum key distribution systems is presented.
Źródło:
Acta Physica Polonica A; 2013, 124, 3; 606-609
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza stateczności skarp z gruntu zbrojonego
Reinforced slope stability analysis
Autorzy:
Cała, M.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/349364.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
stateczność skarp
siatki stalowe Tecco
zbrojenie
gwoździe gruntowe
soil nails
slope stability
wire mesh
reinforcement
Opis:
Artykuł dotyczy analizy stateczności skarp zbrojonych. Zwykle do zbrojenia używa się gwoździ bądź kotew wraz z zabezpieczeniem powierzchniowym. Analiza stateczności dla takich przypadków ogranicza się zazwyczaj do uwzględnienia gwoździ lub kotwi współpracujących z gruntem. Zbrojenie powierzchniowe na ogół nie jest brane pod uwagę. W artykule opisano sposób modelowania zbrojenia skarpy przy użyciu gwoździ ze wstępnym naciągiem. W obliczeniach uwzględniono także oddziaływanie siatki stalowej ułożonej na powierzchni skarpy. Gwoździe modelowano przy użyciu elementów rockbolt, które mogą zostać zerwane, natomiast siatkę stalową modelowano jako element belkowy z wytrzymałością wyłącznie na rozciąganie, połączony z gruntem za pomocą interfejsu typu unglued. Wskaźniki stateczności obliczano przy użyciu metody redukcji wytrzymałości na ścinanie. Wstępny naciąg gwoździ był realizowany przez napisaną przez autorów funkcję FISH. Przeprowadzono szereg obliczeń wskaźników stateczności, wykazując, że oblicowanie z siatki stalowej jest nie tylko zabezpieczeniem powierzchniowym, ale wpływa również znacząco na globalną stateczność skarpy.
This paper deals with the reinforced slope stability analysis. It was assumed that soil profile of a slope consists of two layers. The strong soil (soft rock) is covered by weak soil (or weathered rock). Such slope geology determines the way of soil reinforcement. Usually nails or anchors are applied for to provide the overall stability of the slope. However the face reinforcement of soft soil must also be used. Generally, slope stability analysis for such case, is limited to nails or anchors interacting with the soil. The face reinforcement is usually not taken under consideration. The way of reinforcing the slope with pre-tensioned nails connected to wire mesh facing is described and applied. The nails are modeled by rockbolt elements, which can rupture. The wire mesh is modeled as beam element with resistance only in tension and connected to the soil by "unglued" interface. Factor of safety (FS) of a slope is calculated with shear strength reduction technique. Nails pre-tension were obtained by user-written FISH function. A series of FS calculations were performed to show, the wire mesh facing is not only local stability protection, but can significantly increase the overall slope stability.
Źródło:
Górnictwo i Geoinżynieria; 2008, 32, 2; 67-77
1732-6702
Pojawia się w:
Górnictwo i Geoinżynieria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aspekty metrologiczne bezdotykowego diagnozowania wirujących łopatek sprężarki
Metrological aspects of non-contact roating blade measurements
Autorzy:
Witoś, M.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/209146.pdf
Data publikacji:
2008
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
odstęp czasu
nierównomierne próbkowanie
łopatki
zmęczenie
silniki lotnicze
diagnostyka silników lotniczych
tip timing
nonuniform sampling
blades
fatigue
aircraft engine
diagnosis of aircraft engine
Opis:
Przedstawiono podstawy teoretyczne stosowania elastycznego znacznika fazy - wirującej i drgającej łopatki sprężarki - do kompleksowego diagnozowania turbinowego silnika lotniczego (metoda tip timing). Wskazano na rolę numerycznych metod analizy w rozdzieleniu składowych sygnału pomiarowego (aperiodycznej i oscylacyjnej) oraz potrzebę weryfikacji istniejących algorytmów analizy danych, pochodzących z nierównomiernego próbkowania. Omówiono 15-letnie spostrzeżenia eksploatacyjne stosowania metody na samolotach TS-11 "Iskra".
The paper presents theoretical background of using elastic key phasor-rotating and vibrating compressor blade - for complex jet engine diagnosis (tip timing method). The role of numerical methods of measurement signal decomposition onto parts (aperiodic and oscillation) is pointed. It also shows the need of existing algorithms (from irregular sampling) verification. Fifteen years' service knowledge of using mentioned method aboard T-11 "Iskra" is presented.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2008, 57, 2; 289-299
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The study of the technical service impact on the aircraft technical readiness
Autorzy:
Uchman, Z.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/245912.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
exploitation system efficiency
aircraft technical readiness
technical services
Opis:
The efficiency of the aircraft exploitation process is a problem, to which more and more attention is paid not only in the commercial aviation, but also in the military one. One of the factors, which have a direct impact on its level, is the operated aircraft or helicopter technical readiness that is the ability of airworthiness when there is a need to use them in order to perform specific aviation tasks. In turn, the aircraft technical readiness level is affected by a number of factors, the most important of which include its characteristics, technical service system and logistical security system. This paper is devoted to the issue connected with the aircraft technical readiness assessment as well as identification of factors, which have an impact on its level, and also their impact level analysis. Furthermore, the particular attention was paid to technical services. The research results of a few types of aircraft in terms of the technical service malfunction and damage impact on their technical readiness level were also presented. At the end, the importance of such an approach and the possible use in practice were emphasised.
Źródło:
Journal of KONES; 2016, 23, 2; 397-406
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental pollution caused by a direct injection engine
Autorzy:
Jankowski, A.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/243382.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
air pollution
environmental protection
Opis:
In the paper, the authors made an analysis of mechanisms of the toxic components formation of exhaust gases in the direct injection engines. The genesis as well as the typical engine construction solution with the use of direct injection in diesel engines and these with positive ignition was developed. The typical construction solution of the Common Rail (CR) system, which is one of many elements increasing the purity of exhaust gases, was also presented. The basic advantages of direct injection, especially in case of the positive ignition engine, were also briefly described. Then, the mechanism for the formation of toxic components of exhaust gases in the direct injection diesel engines was presented. Moreover, the definition and dependency on the indicated mean effective pressure were shown, and the closed indicator graph, which is indispensable to calculate values of this pressure, was also (graphically) presented. In this paper, the mechanisms and processes, with the use of which it is possible to reduce the emission of toxic components of exhaust gases, were quoted. The exhaust gas recirculation with the EGR valve, which allows supplying the exact amount of gases to the engine inlet system, is such an example. The advantages of using this type of solutions were described, and a typical construction solution was presented in the diagram. The paper was completed with a conclusion, which emphasised the importance of direct injection on reducing the emission of toxic components of exhaust gases.
Źródło:
Journal of KONES; 2015, 22, 4; 133-138
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 16-30 z 462

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies