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Wyświetlanie 1-15 z 28
Tytuł:
Simulation studies of micro air vehicle
Autorzy:
Sibilski, K.
Zyluk, A.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/244124.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
construction of micro air vehicles
simulation studies
Opis:
In the paper, we presented results of analysis of Micro Air Vehicle MAV stability on high Angle of Attack (AOA) by application continuation methods and bifurcation theory. Moreover, it presented two main tasks accomplished – performance analysis carried out, as well as numerical studies in order to find possible simplifications drive model, suitable for further design and analysis. This paper shows the typical MAV construction and their characteristics. Then presented results of calculations of necessary and required power (for CR3516 motor). The results shown in the Figure. The next step of MAV performance examination was calculations of dynamics stability and controllability of open loop system. Also shown state, and control matrixes for the longitudinal motion. Roots loci and open loop dynamics analysis for longitudinal motion are shown in the Figures. The next shown few function such as transfer function for the input (longitudinal velocity), transfer function for the pitch angular rate q input and for the lateral motion, state, and control matrices, etc. At the end shown results of simulations for dynamic response of MAV flight disturbance is shown in the Figure. The paper concluded short motions.
Źródło:
Journal of KONES; 2015, 22, 4; 243-252
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies and tests of micro aerial vehicle during flight
Autorzy:
Kowalski, M.
Zyluk, A.
Sibilski, K.
Powiązania:
https://bibliotekanauki.pl/articles/245658.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
Micro Air Vehicle
flight tests
Opis:
The article presents the results of flight tests of an unmanned flying device based on a model Micro Air Vehicle (MAV). The airplane was used during experimental studies. In the article, on-board equipment of micro-plane used in the study has been shown. Furthermore, the process of integrating all of the avionics equipment with MAV has been described. During the flight test, all parameters of microaircraft flight such as air and cruising speeds, altitude, air route, angles of tilt, slope angle, deviation angle, tilting speed, slope speed, deviation speed, etc. were recorded. During the study, the behaviour of micro-aircraft in various phases of flight such as autonomous take off, landing, programmable flight to the specific points of the air route was checked. In addition, the action of specified fail safe features of micro airplane operating in the case of a failure (e.g. in the case of low voltage of power package, loss of GPS signal, loss of communication with the ground station, etc.) is determined. The graphs of some flight parameters and figures of flight routes as well as flight profiles during the programmable flight have been presented. The researches allow for the verification of the integration process of micro-aircraft with on-board systems and they also allow for evaluation of its functional characteristics in further studies such as formation flights and bypassing the obstacles.
Źródło:
Journal of KONES; 2015, 22, 4; 155-162
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aerodynamic measurements micro air vehicle
Autorzy:
Zyluk, A.
Sibilski, K.
Kowalski, M.
Wiśniowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/243837.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
construction of micro air vehicles
aerodynamic measurements
Opis:
In present times, constructions of micro air vehicles arouse more and more interest researchers and manufacturers. Air turbulence is perceived as a major problem for Micro Air Vehicles (MAV) in outdoor applications. According to the literature, short duration vertical gusts may have velocity comparable to MAV airspeed, so brief periods of flight at very large angles of attack have to be considered. In these circumstances, it seems reasonable to apply the design with as high stall angle of attack as possible. In particular, the flow has to be attached to control surfaces to perform effective control in order to damp air turbulence effect. Therefore, an aircraft configuration was developed with cranked delta wing and propeller located inside the wing contour. To prove the value of the concept, wind tunnel experiment was undertaken. The prototype demonstrated ability to fly controllably at extremely high angles of attack. Moreover we present few disadvantages of these construction for example it was very sensitive to the motor settings, since every rpm change required immediate airplane trimming to maintain straight path of flight. This drawback can be eliminated by application of counter-rotating propeller. The status of the program is presented in the paper, including the most recent results, as well as currently undertaken experiments and plans for the nearest future.
Źródło:
Journal of KONES; 2015, 22, 4; 343-353
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Role of a Laser Photography Device Illuminator in Acquisition of Spatial Information
Autorzy:
Piszczek, M.
Kowalski, M.
Szustakowski, M.
Rutyna, K.
Ludwikowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1418030.pdf
Data publikacji:
2012-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.30.Sy
42.30.Tz
02.60.-x
Opis:
The paper is concerned with practical studies of illuminator role in the process of acquisition of spatial information with use of laser photography device. The laser photography device working according to the time-spatial framing method needs both acquisition and illumination process to happen in a very short-time. Fulfillment of both conditions is necessary for proper operation of this device. Using a specialized laser illuminator determines the growth of information potential of the laser photography device and allows reducing parasitic impact of daylight. The presented solution not only improves typical vision systems parameters but it introduces new quality for imaging devices.
Źródło:
Acta Physica Polonica A; 2012, 122, 5; 862-865
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser Photography Device - Spatial Parameters of Imaging
Autorzy:
Piszczek, M.
Kowalski, M.
Karol, M.
Rutyna, K.
Zarzycki, M.
Szustakowski, M.
Ludwikowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1399398.pdf
Data publikacji:
2013-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.30.Sy
42.30.Tz
02.60.-x
Opis:
Laser photography device is an imaging device developed in the Institute of Optoelectronics, Military University of Technology and it is an example of modern image acquisition device. The laser photography device allows to define a 3D observation scene thanks to short-time scene illumination and image acquisition method. This device works according to time-spatial framing method. In the paper, basics of time-spatial framing method are explained. Special attention is given to time parameters of device and their influence to spatial parameters of registered images. In this paper the laser photography device and results of chosen experiments are presented and described. Experimental results presented in the paper show the potential and possibilities of using the laser photography device as a camera for observation and measurement applications.
Źródło:
Acta Physica Polonica A; 2013, 124, 3; 550-553
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Test flights in the aircraft operation process
Autorzy:
Cur, K.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/241570.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
aircraft test flights
organisation of test flights
testing of aircraft properties
Opis:
The article presents theoretical and practical aspects of aircraft reliability and safety of the performance of test flights in the operation process. The selected issues of operation of the means of transport in the aspect of the aircraft reliability, as well as the intensity of damage during the performance of test flights were presented. In short, the rules for operating the aircraft during test flights are described. A brief description of the causes of air crashes during test flights was presented, and the main hazards and risk occurring at the same time were shown. Subsequently, the authors’ methodology including a diagram for studying the aircraft features in terms of aerodynamic characteristics and performance and a model of the maintenance system of aircraft to perform the test flights, were demonstrated. The elements of the decision-making model, developed for this purpose, were briefly presented, showing the required and defined decision variables, constraints and an objective criterion function. The algorithm of the method was presented, and the examples of practical application and graphical data presentation in the DOSPIL application were indicated. The article was concluded with a short summary in which the main effects and directions of further work were presented.
Źródło:
Journal of KONES; 2018, 25, 3; 99-109
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of the stainless steel electropolishing process by organic additives
Autorzy:
Lochynski, P.
Kowalski, M.
Szczygiel, B.
Kuczewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/779206.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
electropolishing
organic additives
surface roughness
stainless steel
Opis:
The influence of organic additives on the process of surface electropolishing of AISI 304 type steel was determined. Additives were selected in initial potentiodynamic tests pursuant to the plateau analysis on the current/potential curves. The assessment of the operational effectiveness of additives consisted in determining the relationship between surface gloss after electropolishing and the mass loss of the sample and in determining surface roughness. The applied electropolishing bath consisted of a mixture of concentrated acids: H3PO4  and H2SO4 and the following organic additives were used: triethylamine, ethanolamine, diethanolamine, triethanolamine, diethylene glycol monobutyl ether and glycerol. The best electropolishing result, i.e. low roughness and high gloss of stainless steel surface with a relatively low mass loss of the sample at the same time were obtained for baths containing triethanolamine.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 4; 76-81
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the path type on selected technological effects in the trochoidal milling
Autorzy:
Waszczuk, K.
Karolczak, P.
Wiśniewska, M.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/103363.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
hard machining
trochoidal milling
tool path
Opis:
The article presents basic information about machining materials in hardened state – it particularly describes a method of the so called hard milling. The paper discusses strategies and methods in hard milling, presents trochoidal milling, its advantages and disadvantages. It also presents research methodology and effects which concerned determination of a tool path impact on selected technological effects after trochoidal milling of the groove.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 147-153
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Personal identity verification method based on lips photographs
Autorzy:
Wrobel, K.
Doroz, R.
Porwik, P.
Naruniec, J.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/333548.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
biometrics
lip features
data classification
biometria
cechy wargi
klasyfikacja danych
Opis:
The paper presents a personal identification method based on lips photographs. This method uses a new approach to the extraction and classification of characteristic features of the mouth from photographs. It eliminates the drawbacks that occur during the acquisition of lip print images with the use of the forensic method that requires special tools. Geometrical dimensions of the entire mouth as well as of the upper and lower lips were adopted as the features, on the basis of which the verification is performed. An ensemble classifier was used for the classification of the features obtained. The effectiveness of the classifier has been verified experimentally.
Źródło:
Journal of Medical Informatics & Technologies; 2015, 24; 59-65
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability analysis of underground mining openings with complex geometry
Autorzy:
Cała, M.
Stopkowicz, A.
Kowalski, M.
Blajer, M.
Cyran, K.
d'Obryn, K.
Powiązania:
https://bibliotekanauki.pl/articles/178728.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
stability analysis of underground workings
complex geometry and geological structure
3D numerical modelling
Wieliczka Salt Mine
Opis:
Stability of mining openings requires consideration of a number of factors, such as: geological structure, the geometry of the underground mining workings, mechanical properties of the rock mass, changes in stress caused by the influence of neighbouring workings. Long-term prediction and estimation of workings state can be analysed with the use of numerical methods. Application of 3D numerical modelling in stability estimation of workings with complex geometry was described with the example of Crystal Caves in Wieliczka Salt Mine. Preservation of the Crystal Caves reserve is particularly important in view of their unique character and the protection of adjacent galleries which are a part of tourist attraction included in UNESCO list. A detailed 3D model of Crystal Caves and neighbouring workings was built. Application of FLAC3D modelling techniques enabled indication of the areas which are in danger of stability loss. Moreover, the area in which protective actions should be taken as well as recommendations concerning the convergence monitoring were proposed.
Źródło:
Studia Geotechnica et Mechanica; 2016, 38, 1; 25-32
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zespol ptakow legowych Rezerwatu im.Krola Jana Sobieskiego w Warszawie
Autorzy:
Rowinski, P
Nowakowski, J.K.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/32916.pdf
Data publikacji:
1998
Wydawca:
Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
Tematy:
ptaki
rezerwat im.Krola Jana III Sobieskiego
rezerwaty przyrody
Warszawa
ptaki legowe
Źródło:
Kulon; 1998, 03, 1; 75-87
1427-3098
Pojawia się w:
Kulon
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Notatki przyrodnicze. Ssaki.
Autorzy:
Lesinski, G
Blicharski, M.
Sielecki, M.
Kowalski, M.
Krasnodebski, I.
Sachanowicz, K.
Drozdz, R.
Wojtowicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/33051.pdf
Data publikacji:
1998
Wydawca:
Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
Tematy:
Puszcza Kozienicka
wystepowanie
ssaki
gacek szary
smuzka
nietoperze
Plecotus austriacus
Warszawa
Sicista betulina
Źródło:
Kulon; 1998, 03, 1; 101-103
1427-3098
Pojawia się w:
Kulon
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakteryzacja porównawcza współrzędnościowej techniki pomiarowej i tomografii komputerowej
Comparative characterisation of coordinate measuring technique and computed tomography
Autorzy:
Sładek, J.
Kowalski, M.
Ryniewicz, A.
Gacek, K.
Powiązania:
https://bibliotekanauki.pl/articles/152682.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
WMP
tomografia komputerowa
porównanie
CMM
computed tomography
comparison
Opis:
Niniejsze opracowanie jest związane z dwoma znacznie rozpowszechnionymi technikami pomiarowo-badawczymi o charakterze uniwersalnym, czyli takimi, które mogą być zastosowanie w różnych dziedzinach np. w technice i medycynie. Za cel przyjęto wstępne porównanie techniki współrzędnościowej z tomografią komputerową. Obydwie obecnie stosowane techniki wykorzystują zaawansowane oprogramowanie, ale działają wg zupełnie różnych zasad. W pracy opisano schematy strukturalne działania obu urządzeń , wektory oddziaływań pól pomiarowych i ich cechy charakterystyczne co do układów współrzędnych. Te cechy zostały odniesione do oceny odwzorowania kształtu powierzchni z regularnymi wgłębieniami. Przeprowadzono badania wstępne oraz zamieszczono przykładowe rezultaty pomiarów w postaci graficznej. Dla głównych kryteriów metrologicznych sporządzono porównanie cech w formie tabelarycznej i sformułowano wnioski z zaakcentowaniem zastosowań medycznych. W przypadku zastosowania TK ocena liczbowa odstępstw od kształtu nominalnego odbywa się zasadniczo na drodze porównawczej i jest wyraźnie mnie precyzyjna od oceny metodą współrzędnościową ale dla zastosowań medycznych wystarczająca.
This study is connected with two much prevalent measurement and testing techniques of a universal character, namely those that can be applied to various fields such as engineering and medicine. The aim is the initial comparison of coordinate techniques with computer tomography. These two techniques use advanced software, but operate on entirely different principles. The paper describes structural diagrams of two devices: Coordinate Measuring Machines and Computer Tomography, vectors of measurement fields impacts and their characteristics as a coordinate system. These features were related to the assessment of surface mapping of a spherical shape. Preliminary studies were conducted, and examples of measuring results in graphic form were provided. For the main metrological criteria the comparison of the characteristics in tabular form was made and the conclusions with emphasis on medical applications were formulated. In the case of Computer Tomography, the numerical evaluation of deviations from the nominal shape is primarily performed through the compari-son and is clearly less precise than the evaluation with coordinate method but is sufficient for medical applications.
Źródło:
Pomiary Automatyka Kontrola; 2010, R. 56, nr 8, 8; 942-945
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systemy wspomagające podejmowanie decyzji w przedsiębiorstwie
Business intelligence systems
Autorzy:
Rączka, K.
Kowalski, M.
Gąsiorek, S.
Powiązania:
https://bibliotekanauki.pl/articles/287559.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
wspomaganie
podejmowanie decyzji
hurtownia danych
integracja systemów
ETL
przetwarzanie informacji
analiza informacji
business intelligence
data warehouse
system integration
data processing
Opis:
Dokument stanowi przegląd współczesnych technologii informatycznych, architektur systemowych oraz zagadnień projektowo - implementacyjnych związanych z tematyką wspomagania podejmowania decyzji w przedsiębiorstwie (ang. business intelligence). Przedstawione są warstwy logiczne tego typu systemów, wraz z omówieniem typowych wyzwań i problemów napotykanych w każdej z nich podczas realizacji projektów integracyjnych dedykowanych do zebrania całości niezbędnych informacji. Omówiony jest również przepływ informacji, pokazana jest rola systemów wspierających integrację oraz znaczenie towarzyszących procesów biznesowych z naciskiem na zarządzania jakością danych dotyczących krytycznych aspektów funkcjonowania przedsiębiorstwa.
The document presents review of up to date information technologies, system architectures and issues related to design and development of business intelligence systems. It pictures logical layers of such systems, together with explanation of typical challenges and problems related to every of the layers meet during implementation of systems of such class. It also presents data flows, the role of integration supporting systems and importance of associated business processes, especially data quality management.
Źródło:
Inżynieria Rolnicza; 2007, R. 11, nr 6 (94), 6 (94); 205-212
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of aircraft lost of control in the flight by continuation, bifurcation, and catastrophe theory methods
Autorzy:
Sibilski, K.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/246470.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
nonlinear dynamics of flight
lost of control in the flight
catastrophe theory
bifurcation
continuation method
Opis:
Lost of Control in Flight (LOC-I) is ordinarily associated with flight outside of the normal flight envelope, with nonlinear behaviours, and with an inability of the pilot to control the aircraft. These results provide a means for analysing accident data to establish whether or not the accident should be classified as LOC-I. Moreover, they help identify when the initial upset occurred, and when control was lost. The analysis also suggests which variables were involved, thereby providing clues as to the underlying mechanism of upset. However, it does not provide direct links to the flight mechanics of the aircraft, so it cannot be used proactively to identify weaknesses or limitations in the aircraft or its control systems. Moreover, it does not explain how departures from controlled flight occur. The complexity of the disaster aetiology stems from both the scale and coupling of the systems (not only the physical aircraft systems but also the organizational systems that support the operation). This complexity creates a pattern of disaster that evolves or it is precipitated through a series of several small failures. The cusp catastrophe model facilitates the mapping of Reason’s latent failure model, providing a descriptive and predictive illustration of the emergence of latent conditions under the trigger of situational factors. The risk of an accident increases as the situational and systematic factors combine to create an inherent instability resulting in the catastrophic event.
Źródło:
Journal of KONES; 2016, 23, 4; 451-460
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 28

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