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Tytuł:
A concept of a simplified visual navigation system for mobile platforms
Autorzy:
Głębocki, R.
Narkiewicz, J.
Zasuwa, M.
Powiązania:
https://bibliotekanauki.pl/articles/320424.pdf
Data publikacji:
2007
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
nawigacja porównawcza
porównanie obrazów
visual navigation
images comparison
Opis:
The concept of visual navigation is based on comparing images from navigation sensors with the data stored in the system memory. A control and navigation system based on information from simplified image sensors was developed for smart missiles. The system was based on images acquired by infrared sensors distributed along the rotating line. The system was tested by simulations giving adequate results. In this paper an extension of the system for application to other vehicles is presented. The main advantages of the proposed system are the ruggedness, simplicity and low cost.
Źródło:
Annual of Navigation; 2007, 12; 23-30
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza metod identyfikacji symulacyjnych modeli wiropłatów
Identification methods of simulation rotorcraft models analysis
Autorzy:
Bibik, P.
Narkiewicz, J.
Ulinowicz, M.
Żugaj, M.
Powiązania:
https://bibliotekanauki.pl/articles/212782.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
zagadnienia problemowe
wytrzymałość
aerodynamika
konstrukcja śmigłowców
próby i badania
ekstrapolacja
problems defining and solving
strength
aerodynamics
helicopter design
tests and research
operation and maintenance
Opis:
Estymacja parametrów modelu na podstawie odpowiedzi układu na wymuszenie nazywana jest identyfikacją. W referacie omówiono proces identyfikacji oraz możliwości jego realizacji w odniesieniu do wiropłatów. Zwrócono uwagę na konieczność oceny wiarygodności uproszczeń nieliniowych, sprzężonych modeli ruchu wiropłatów, stosowanych często dla efektywnego estymowania parametrów modelu. Omówiono metody identyfikacji w dziedzinie czasu: metodę najmniejszych kwadratów wraz z jej wybranymi odmianami oraz filtrację Kalmana i jej rozszerzenia. Jako przykład przedstawiono metodę identyfikacji parametrów modelu śmigłowca bezzałogowego o napędzie elektrycznym T-Rex 600. Identyfikację przeprowadzono dla zawisu i obrotu wokół osi pionowej z różnymi prędkościami kątowymi. Identyfikowano liniowy model stacjonarny w dziedzinie częstotliwości.
Estimation of model parameters based on system response to input function is called identification. In the paper the identification process and the possibility of its implementation in relation to rotorcrafts are discussed. Also the need to assess the credibility of simplification of nonlinear, coupled models describing rotorcraft dynamic, which are frequently used for estimating the effective model parameters, is highlighted. Selected time domain methods of identification such as least squares method together with its selected varieties and Kalman filtering with its extensions are described. The electric T-Rex 600 unmanned helicopter model is chosen as an exemplary rotorcraft object, which model parameters are identified. The identification is carried out for hovering and rotation around a vertical axis with different angular velocities. Stationary linear model of T-Rex 600 is identified in the frequency domain.
Źródło:
Prace Instytutu Lotnictwa; 2011, 10 (219); 13-24
0509-6669
2300-5408
Pojawia się w:
Prace Instytutu Lotnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Autopilot with adaptive vessel modelling
Autorzy:
Narkiewicz, J.
Świętoń, G.
Andrzejczak, M.
Powiązania:
https://bibliotekanauki.pl/articles/320617.pdf
Data publikacji:
2009
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
autopilot
modelowanie statku
vessel modelling
Opis:
A feasibility study of an application of adaptive model in a ship autopilot is presented. The system for predicting a ship motion, developed in the previous studies, was enriched by a control algorithm of the ship motion and the adaptive model of the ship. The signals from the navigation sensors (DGPS, log, and gyrocompass) are filtered by dedicated Kalman filters, and then processed by an integration algorithm to obtain the best estimation of the actual ship position, heading, velocity and rate. These data form the state vector of the ship dynamic model. The model of the ship dynamics has parameters which are identified on-line using particle filter method. The efficiency of applied control methods and collaboration with on-line adaptive dynamics modeling was verified by simulations.
Źródło:
Annual of Navigation; 2009, 15; 93-100
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Basement structure of the Paleozoic Platform in Poland
Autorzy:
Narkiewicz, M.
Petecki, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2060386.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
potential fields
seismics
basement units
Paleozoic Platform
Polska
Caledonides
Opis:
The Paleozoic Platform comprises the southwestern half of the Polish territory, separated from the Precambrian East European Platform (EEP) by a NW–SE trending subvertical lithospheric-scale discontinuity – the Teisseyre-Tornquist Zone. In the present study, the Paleozoic Platform basement is subdivided based on geological and geophysical evidence acquired during the last decades, including deep seismic refraction and reflection results, as well as gravity, magnetic and magnetotelluric data. The units adjacent to the EEP, the Mid-Polish Domain (comprising the Łysogóry Block) and the Pomeranian Block, are characterized by a thinned three-layer EEP-type crystalline crust (age 1.7–3.7 Gy). Their oldest platform cover is probably composed of thick Ediacaran syn-rift sedimentary and volcanic rocks. Their western extension in the contiguous German and Baltic area can be traced as far as the East Elbian Massif and Thor Suture based mainly on magnetic anomaly patterns. The Upper Silesian and Małopolska blocks located in SE Poland are characterized by Cadomian (660–600 My) basement overlain by the thick deformed Ediacaran foredeep deposits. Whereas the units with the EEP-type basement are interpreted as proximal terranes displaced along the EEP margin during the late Early Paleozoic, the blocks with a Cadomian basement are conceived as exotic terranes of a possible Gondwanan provenance. All these terranes were accreted ultimately during the final, latest Silurian stages of the Caledonian deformation although the exact scenario of the amalgamation remains hypothetical. The Sudetic Domain in SW Poland is a collage of different crustal units juxtaposed ultimately in the Pennsylvanian (ca. 310 Ma) during the final episodes of the Variscan Orogeny. Their northern boundary corresponds to the Rheic Suture traceable in magnetic and gravity anomalies pattern along the northern margin of the Wolsztyn–Leszno High, and continuing westwards along the Mid-German Crystalline High. The arcuate trace of the suture in the NE is dextrally displaced along the Odra Fault, and continues southwards where it is mapped as the Moravian–Silesian Suture.
Źródło:
Geological Quarterly; 2017, 61, 2; 502--520
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Compass Deviation Revisited
Autorzy:
Narkiewicz, J.
Żugaj, M.
Powiązania:
https://bibliotekanauki.pl/articles/320793.pdf
Data publikacji:
2010
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
magnetic compass
deviation
correction
Opis:
The system for calculating and updating deviation data for magnetic compass is developed. The method and algorithm for on-line data acquisition and calculation of new deviation corrections is presented. The system is tested by simulations and by experimental data. The system is developed for mobile platforms with compact electrical systems installed on-board with strong variation of vehicle electromagnetic field.
Źródło:
Annual of Navigation; 2010, 16; 75-87
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development and inversion of Devonian and Carboniferous basins in the eastern part of the Variscan foreland (Poland)
Autorzy:
Narkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059528.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Variscides
Central Europe
foreland basin
subsidence
palaeogeography
palaeostress
Opis:
The Polish part of the Central European Variscan foreland includes several regional units that differ in crustal structure and are characteried by distinct Devonian to Carboniferous subsidence and depositional histories. These units responded differently to palaeostress changes along the south ernmargin of the Old Red Continent. During the Devonian to Namurian A, areas located to the south-west of the Teisseyre-Tornquist Zone (TTZ), including the Upper Silesian Coal Basin, Małopolska and Łysogóry-Radom blocks, were influ nced by stress fields similar to those in the west ward adjacent Rheno-Hercynian Zone, whilst the Lublin Basin, located to the north-east of the TTZ, shows a similar development to the Pripyat-Dniepr-Donets rift system. After the Namurian A, the entire southern Pol ish foreland started to respond in a more consistent way to the build-up of synorogenic compressional stresses, implying a more uniform development of the stress field. During the Namurian B to early Westphalian D, the Polish foreland was dominated by north-directed compressional stresses emanating from the Southeastern Variscan Belt. During the late Westphalian and early Stephanian, the entire foreland under went compressional deformation and concomitant basin in version under the influence of stresses propagating from the Moravian-Silesian Foldand-Thrust Belt. In the Polish foreland, the development of Devonian-Carbon if erous basins, as well as the architecture of Variscan structures, clearly reflect the reactivation of preexisting crustal discontinuities, including specifically the TTZ, but also other major geophysically defined crustal bound aries. In general, thick-skinned tectonics controlled by the inherited structural grain of the basement prevailed, whereas structural decoup ling, resulting in the development of minor thrusts and reverse faulting, was of local significance only. The distinct structural-depositional development of the Pomerania region reflects its distal location with respect to the evolving orogen. Orogenic compression influenced this area only indirectly, with the TTZ acting as a guide for the transmission of transtensional and transpressional stresses.
Źródło:
Geological Quarterly; 2007, 51, 3; 231-256
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dyskusja o państwowej służbie geologicznej : trochę historii
Debate on the Polish Geological Survey : a bit of history
Autorzy:
Narkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2075808.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Polska Służba Geologiczna
reorganizacja
historia
Polish Geological Survey
reorganization
history
Opis:
During the period of intellectualferment in 1980-1981 the "Solidarity” Commitee at the Geological Institute elaborated and proposed main guidelines for a reorganization of the Polish Geological Survey. The project, following wide discussion in the Polish geological community, was designed according to standards implemented in leading Western countries. The proposal assumed that the survey should maintain a high scientific level and ought to be independentfrom any direct political influence or pressure ofeconomic lobbies. While organization details proposed in the "Solidarity” project may be disputable, its general premises remain up to date.
Źródło:
Przegląd Geologiczny; 2018, 66, 11; 678--679
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geologia Gór Świętokrzyskich oczami Rodericka Murchisona - wizyta w czerwcu 1843 roku i jej echa
Geology of the Holy Cross Mts. in the eyes of Roderick Murchison - visit in June of 1843 and its echoes
Autorzy:
Narkiewicz, M.
Krzywiec, P.
Diemer, J.
Powiązania:
https://bibliotekanauki.pl/articles/2074933.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Roderick Murchison
Zejszner Ludwik
wycieczka
Góry Świętokrzyskie
dewon
field trip
Holy Cross Mountains
Devonian
Opis:
In June of 1843 Roderick Murchison visited Poland to overview local geology in order to fill the gap between the results of his Russian campaign (1840-1841) and the familiar geology of Western Europe. Recent examination of Murchison's hand-written "Journal" and field notebooks in the archive of the Geological Society of London allows a detailed reconstruction of his visit in the Polish territories. During the five-days "charge" across the Holy Cross Mountains the famous British geologist, accompanied by the outstanding Polish colleague Ludwik Zejszner, had collected plenty of observations that were later partly quoted in Murchison's monumental treatise about the geology of Russia (1845). Among the most important new findings is the identification of the Devonian sediments earlier included by Jerzy Bogumił Pusch (1833–1836) in the Formation of Übergangs Kalkstein und Breccie (Transitional Limestone and Breccia). Murchison’s visit and its results are echoed in later papers by domestic scientists, particularly those by Zejszner. The latter was the first Polish student of the Holy Cross Mountains geology who extensively introduced chronostratigraphic units established by Murchison, including the Silurian and Devonian in particular.
Źródło:
Przegląd Geologiczny; 2012, 60, 4; 220-225
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geologiczna regionalizacja Polski - zasady ogólne i schemat podziału w planie podkenozoicznym i podpermskim
Geological regional subdivision of Poland: general guidelines and proposed schemes of sub-Cenozoic and sub-Permian units
Autorzy:
Narkiewicz, M.
Dadlez, R.
Powiązania:
https://bibliotekanauki.pl/articles/2074618.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
regionalizacja
Polska
kompleks strukturalny
tektonika
podkenozoik
podperm
regional subdivision
Polska
tectonics
structural complex
sub-Cenozoic
sub-Permian
Opis:
The regional subdivisions of major structural complexes distinguished in the Polish territory have been systematically corrected and updated parallel with accumulation of new geological and geophysical data. Regional units are established not only basing on their tectonic characteristics but also on other criteria including sedimentary and subsidence development, magmatism, metamorphism and crustal structure. In future, new units should be defined and older ones redefined in a possibly objective, descriptive way. However, the interpretative approach is unavoidable particularly when older, largely concealed structural complexes are concerned. Therefore, the establishment of formal criteria and "official"regional subdivisions analogous to formal stratigraphic units, seems inappropriate. Proposed schemes or modifications of previous subdivisions will serve as consistent and clear regional reference framework in geological and geophysical studies if they will meet few basic methodological and terminological requirements. Among the most important prerequisites is a clear definition of boundaries of particular units against most recent solid geological maps in a scale of 1:1 000 000 or larger. In accordance with the outlined guidelines the authors' version of the regional framework of Polish sub-Cenozoic and sub-Permian (Variscan) geological units is presented. The subdivisions are based on the modified scheme published by Dadlez (1998) and that by Narkiewicz (2007), respectively. We did not attempt to present a pre-Variscan (Caledonian) regional framework, except for the stable area of the East European Platform devoid of the Devonian-Carboniferous cover. Given the present state of research, such subdivision would be very speculative, reflecting only one of several possible interpretative variants of the Polish Lowlands deep structure.
Źródło:
Przegląd Geologiczny; 2008, 56, 5; 391-391
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Pressure Synthesis versus Calcination – Different Approaches to Crystallization of Zirconium Dioxide
Autorzy:
Kaszewski, J.
Yatsunenko, S.
Pełech, I.
Mijowska, E.
Narkiewicz, U.
Godlewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/779250.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
microwave
hydrothermal technology
zirconium dioxide
calcination
Opis:
Calcination and microwave-assisted hydrothermal processing of precipitated zirconium dioxide are compared. Characterization of synthesized products of these two technologies is presented. The infiuence of thermal treatment up to 1200oC on the structural and spectroscopic properties of the so-obtained zirconium dioxide is examined. It was found that initial crystallization of material inhibits the crystal growth up to the 800oC (by means of XRD and TEM techniques), while the material crystallized from amorphous hydroxide precursor at 400oC, exhibits 26 nm sized crystallites already. It was found using the TG technique that the temperature range 100–200oC during the calcination process is equivalent to a microwave hydrothermal process by means of water content. Mass loss is estimated to be about 18%. Based on X-ray investigations it was found that the initial hydroxide precursor is amorphous, however, its luminescence activity suggests the close range ordering in a material.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 2; 99-105
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrated attitude and navigation system for small airplane
Autorzy:
Topczewski, S.
Żugaj, M.
Narkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/243155.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
navigation
integration
data fusion
INS
GPS
ADC
nawigacja
integracja
fuzja danych
Opis:
Navigation system is one of the most important aircraft systems. Accuracy and precision of position and attitude is extremely important for safe aircraft operations. The integrated INS/GNSS systems are commonly used as autonomous on-board devices for fulfilling this task. The INS sensors like accelerometers and gyroscopes are mainly affected by drift. The GNSS encounter stochastic disturbances with no tendency to grow in time but as each radio navigation system may be jammed or its signal can just be not available. These base properties of errors make these two systems well suited for integration. These were the main motivations for development of integrated navigation and attitude determination system, presented in this article. In the developed system, data is integrated from all available sensors, particularly INS, GPS, and air data computer. Navigation information from these sensors is combined using Kalman filtering algorithms to obtain robust solution, effective also in a case of failure/inaccessibility of GPS. Position calculated using the accelerations from INS is corrected by position from GPS and optionally by position calculated using the true airspeed (TAS) from ADC. Navigation system is modelled and programmed in MATLAB environment. The system was tested using the data from real experiments, proving efficiency of the method.
Źródło:
Journal of KONES; 2017, 24, 1; 339-348
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low Concentration Effect of Fe$\text{}_{3}$O$\text{}_{4}$ and Fe$\text{}_{3}$C Magnetic Nanoparticles in Non-Magnetic Matrix on the FMR Spectra
Autorzy:
Bodziony, T.
Guskos, N.
Roslaniec, Z.
Narkiewicz, U.
Kwiatkowska, M.
Maryniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/2043572.pdf
Data publikacji:
2005-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.50.+g
75.70.-i
Opis:
PTMO-block-PET polymer filled with a low concentration (0.1 wt.%) of binary magnetic system: magnetite (Fe$\text{}_{3}$O$\text{}_{4}$) and iron carbide (Fe$\text{}_{3}$C) with carbon (C) was prepared. Characterization of the sample was done by using X-ray diffraction and scanning electron microscopy methods. Temperature dependence of the FMR spectra was carried out in the 10-300 K temperature range. The extraordinary temperature dependence behaviour of FMR spectra was recorded. The FMR spectra were fitted by two Lorentzian lines originating from magnetite and iron carbide. The anomalous behaviour of FMR spectra below 100 K could be explained by the skin effect or by the freezing of the matrix benzene rings at about 115 K. The temperature dependence of the g parameter below 75.5 K (opposite shift of the resonance field to usually observed) was interpreted as a result of strong antiferromagnetic interaction of some portion of agglomerates.
Źródło:
Acta Physica Polonica A; 2005, 108, 2; 297-302
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-Frequency Raman Scattering from ZnO(Fe) Nanoparticles
Autorzy:
Kostić, R.
Romčević, N.
Romčević, M.
Hadžić, B.
Rudolf, R.
Kuryliszyn-Kudelska, I.
Dobrowolski, W.
Narkiewicz, U.
Sibera, D.
Powiązania:
https://bibliotekanauki.pl/articles/1807817.pdf
Data publikacji:
2009-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.30.Fs
78.67.-n
Opis:
Nanocrystalline samples of ZnO(Fe) were synthesized by wet chemical method. Samples were characterized by X-ray diffraction to determine the sample composition and the mean crystalline size. Low-frequency Raman modes were measured and assigned according to confined acoustic vibrations of spherical nanoparticles. Frequencies of these vibrational modes were analyzed in elastic continuum aproximation, which considers nanoparticle as homogeneous elastic sphere.
Źródło:
Acta Physica Polonica A; 2009, 116, 1; 65-67
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and identification of actuator for flap deflection
Autorzy:
Ulinowicz, M.
Narkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/384620.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
electromechanical actuator
system identification
maximum likelihood method
Opis:
The electromechanical actuator (EMA) model is presented with the methods for identifying its design parameters. The actuator is a part of the system for flap deployment on the commercial transport airplane. The differential equations with the feedback control describe behaviour of the actuator deflection. There are two concepts of drive system simultaneously considered: a high torque/low speed (HT/LS) and a geared low torque/high speed (LT/HS). For parameter identification in both cases the Maximum Likelihood (ML) method with two minimisation algorithms: linearized Gauss-Newton and Levenberg-Marquardt is applied. Both approaches for each of two design solutions were effective, while tested on hypothetical data.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2011, 5, 4; 35-40
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanocrystalline ZnO Doped with Fe$\text{}_{2}$O$\text{}_{3}$ - Magnetic and Structural Properties
Autorzy:
Kuryliszyn-Kudelska, I.
Hadžić, B.
Sibera, D.
Kilanski, L.
Romčević, N.
Romčević, M.
Narkiewicz, U.
Dobrowolski, W.
Powiązania:
https://bibliotekanauki.pl/articles/2048113.pdf
Data publikacji:
2011-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Tt
81.05.Dz
75.50.Lk
75.50.Vv
Opis:
We have studied the magnetic properties of ZnO nanocrystals doped with Fe$\text{}_{2}$O$\text{}_{3}$ in the magnetic dopant range from 5 to 70 wt%. The nanocrystals were synthesized by wet chemical method. The detailed structural characterization was performed by means of X-ray diffraction and micro-Raman spectroscopy measurements. The results of systematic measurements of magnetic AC susceptibility as a function of temperature and frequency are presented. We observed different types of magnetic behavior. For ZnO samples doped with low content of Fe$\text{}_{2}$O$\text{}_{3}$, the results of low-field AC susceptibility are satisfactorily explained by superparamagnetic model including inter-particle interactions. With the increase of magnetic Fe$\text{}_{2}$O$\text{}_{3}$ content, the spin-glass-like behavior is observed.
Źródło:
Acta Physica Polonica A; 2011, 119, 5; 689-691
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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