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Wyszukujesz frazę "System modeling" wg kryterium: Temat


Tytuł:
Fractional discrete model of an electrical drive with brushless micro-motor
Autorzy:
Matusiak, M.
Bąkała, M.
Wojciechowski, R.
Ostalczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/200454.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
system modeling
system identification
fractional order calculus
Opis:
The use of fractional-order calculus for system modeling is a good alternative to well-known classic integer-order methods, primarily due to the precision with which the modeled object may be mapped. In this study, we created integer and fractional discrete models of a real object – a highspeed brushless micro-motor. The accuracy of the models was verified and compared.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 421-427
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Management of development of manufacturing enterprises in decentralization conditions
Autorzy:
Usov, Anatolii V.
Niekrasova, Liubov A.
Dašić, Predrag V.
Powiązania:
https://bibliotekanauki.pl/articles/1841389.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
development
manufacturing enterprise
system modeling
production system
strategic planning
Opis:
This article summarizes the arguments and counterarguments within the scientific discussion on identifying the enterprise’s state to evaluate its effectiveness and optimize the target functions in solving enterprise development problems. The proposed scientific and methodological approach to modeling the enterprise development management system under decentralization conditions and its practical implementation makes it possible to determine the dominant development parameters of manufacturing enterprises that influence the United Territorial Community and to timely track the impulses and space of the United Territorial Community state, taking into account the PS state as parameters for its development. The proposed analysis of the Production System state within the United Territorial Community framework and evaluating its development dynamics shows the necessity of forming a system of generalized vector-scalar, situationally oriented indicators.
Źródło:
Management and Production Engineering Review; 2020, 11, 4; 46-55
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Management of development of manufacturing enterprises in decentralization conditions
Autorzy:
Usov, Anatolii V.
Niekrasova, Liubov A.
Dašić, Predrag V.
Powiązania:
https://bibliotekanauki.pl/articles/1841402.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
development
manufacturing enterprise
system modeling
production system
strategic planning
Opis:
This article summarizes the arguments and counterarguments within the scientific discussion on identifying the enterprise’s state to evaluate its effectiveness and optimize the target functions in solving enterprise development problems. The proposed scientific and methodological approach to modeling the enterprise development management system under decentralization conditions and its practical implementation makes it possible to determine the dominant development parameters of manufacturing enterprises that influence the United Territorial Community and to timely track the impulses and space of the United Territorial Community state, taking into account the PS state as parameters for its development. The proposed analysis of the Production System state within the United Territorial Community framework and evaluating its development dynamics shows the necessity of forming a system of generalized vector-scalar, situationally oriented indicators.
Źródło:
Management and Production Engineering Review; 2020, 11, 4; 46-55
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formal notation of a logistic system model taking into consideration cargo stream transformations
Formalizacja zapisu modelu systemu logistycznego z uwzględnieniem przekształceń strumieni ładunków
Autorzy:
Wasiak, M.
Powiązania:
https://bibliotekanauki.pl/articles/224349.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
systemy logistyczne
modelowanie systemów logistycznych
strumienie ładunków
logistic systems
system potential
logistic system modeling
Opis:
The modeling of logistic systems is a complex task. Specitic goals to be attained by the systems (mainly cargo stream form transformations) and the diversity of resources used within the systems are the main reasons. Therefore various models useful for the partial analyses of logistic systems have been devised. The author's approach to the formaI notation of a logistic system model proposed in this paper may be used as a basis to work out various classes of detailed (integrated) models. In addition to cargo stream time, form and location transformations, transformations of material and human resources used within logistic systems have also been taken into account in the proposed model.
Modelowanie systemów logistycznych stanowi złożone zagadnienie. Przyczyną tego jest specyfika zadań stawianych przed tymi systemami (głównie chodzi tu o transformacje strumieni ładunków ze względu na postać) oraz różnorodność zasobów, jakie mogą być w tych systemach wykorzystywane. Sprawia to, że konstruowane są różnorodne modele systemów logistycznych, które umożliwiają ich cząstkowe analizy. W artykule zaproponowano autorskie podejście do formalizacji zapisu modelu systemu logistycznego, który może być podstawą do opracowywania modeli szczegółowych (scalonych) różnych klas. W proponowanym modelu poza odwzorowaniem przekształceń strumieni ładunków ze względu na czas, postać oraz przestrzeń, w sposób szczegółowy przedstawiono odwzorowanie rzeczowych i ludzkich zasobów wykorzystywanych w systemach logistycznych.
Źródło:
Archives of Transport; 2011, 23, 1; 91-110
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stepper motor open-loop control system modeling and control strategy optimization
Autorzy:
Zhang, Deode
Wang, Jingqi
Qian, Lei
Yi, Jun
Powiązania:
https://bibliotekanauki.pl/articles/141113.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acceleration and deceleration control
open loop control
stepper motor
subdivision control
system modeling
Opis:
The study of the subdivision driving technology of a stepper motor and two types of typical acceleration and deceleration curves aims at optimizing the open-loop control performance of the stepper motor. The simulation model of a two-phase hybrid stepper motor open-loop control system is set up based on the mathematical model of the stepper motor, in order to let the stepper motor have the smaller stepper angle, two types of typical acceleration and a deceleration curve algorithm are designed for the real- time online calculation based on the subdivision driving technology. It respectively carries out the simulation analysis for their control effects. The simulation results show that the parabolic acceleration and deceleration curves have a larger maximum in-step rotation angle and the faster dynamic response ability in the same control period, and at the same time, the position tracking error of an intermediate process is smaller.
Źródło:
Archives of Electrical Engineering; 2019, 68, 1; 63-75
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-objective analysis of Polish domestic power system development from point of view of unmanned factories. A cybernetic issue
Autorzy:
Tchórzewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/950676.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
development model
identification process
MATLAB and Simulink environment
multi-parameters analyze
power system modeling
unmanned factory
Opis:
The paper contains selected results of research on the Domestic Power System (DPS) as an unmanned factory. Models of the DPS system of the MISO type, obtained as a result of identification for 14 inputs and 4 outputs were presented. Particular attention was given to the identification and the assessment of the DPS development based on the systems and control theory. The obtained models of the DPS development were analyzed and discussed. The studies were obtained model of the development of the DPS, and on the basis of is knowledge of the structural and parametrical changes of system development. The model can be used to analyze the design and development of the system from the point of view of the growth of internal organization system and the transition to higher levels of control.
Źródło:
Archives of Electrical Engineering; 2016, 65, 3; 541-558
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advanced Real-time Evaluation and Data Quality Monitoring Model Integration with FPGAs for Tokamak High-performance Soft X-ray Diagnostic System
Autorzy:
Wojenski, A.
Poźniak, K.
Mazon, D.
Chernyshova, M.
Powiązania:
https://bibliotekanauki.pl/articles/227260.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
data quality monitoring
system modeling
FPGA
Verilog/VHDL
HDL
GEM detector
SXR plasma diagnostics
modular measurement system
data evaluation
Opis:
Based on the publications regarding new or recent measurement systems for the tokamak plasma experiments, it can be found that the monitoring and quality validation of input signals for the computation stage is done in different, often simple, ways. In the paper is described the unique approach to implement the novel evaluation and data quality monitoring (EDQM) model for use in various measurement systems. The adaptation of the model is made for the GEM-based soft X-ray measurement system FPGA-based. The EDQM elements has been connected to the base firmware using PCI-E DMA real-time data streaming with minimal modification. As additional storage, on-board DDR3 memory has been used. Description of implemented elements is provided, along with designed data processing tools and advanced simulation environment based on Questa software.
Źródło:
International Journal of Electronics and Telecommunications; 2018, 64, 4; 473-479
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SOFC-based micro-CHP system as an example of efficient power generation unit
Autorzy:
Kupecki, J.
Badyda, K.
Powiązania:
https://bibliotekanauki.pl/articles/240419.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modelowanie
system zasilania
modeling
power system
SOFC
Opis:
Microscale combined heat and power (CHP) unit based on solid oxide fuel cells (SOFC) for distributed generation was analyzed. Operation principle is provided, and the technology development in recent years is brie.y discussed. System baseline for numerical analysis under steady-state operation is given. Grid-connected unit, fuelled by biogas corresponds to potential market demand in Europe, therefore has been selected for analysis. Fuel processing method for particular application is described. Results of modeling performed in ASPEN Plus engineering software with certain assumptions are presented and discussed. Due to high system electrical efficiency exceeding 40%, and overall efficiency over 80%, technology is an example of highly competitive and sustainable energy generation unit.
Źródło:
Archives of Thermodynamics; 2011, 32, 3; 33-43
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of the internal combustion engine cooling system
Autorzy:
Kneba, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/240510.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modeling
combustion engine
cooling system
modelowanie
silnik spalinowy
instalacja chłodnicza
Opis:
The article concerns computer modelling of processes in cooling systems of internal combustion engines. Modelling objectives and existing commercial programs are presented. It also describes Author’s own method of binding graphs used to describe phenomena in the cooling system of a spark ignition engine. The own model has been verified by tests on the engine dynamometer. An example of using a commercial program for experimental modelling of an installation containing a heat accumulator is presented.
Źródło:
Archives of Thermodynamics; 2019, 40, 3; 109-121
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of Petri net based model of a discrete event manufacturing system for nonlinear process plan
Autorzy:
Słota, A.
Zając, J.
Uthayakumar, M.
Powiązania:
https://bibliotekanauki.pl/articles/406874.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
manufacturing system
Petri net
nonlinear process plan
modular modeling
Opis:
This work presents a modelling approach for nonlinear process plan (NLPP) implementation in discrete event manufacturing system (DEMS). NLPP is used for the building of the modular structure of an Object Observable Petri Net model of DEMS. The general capabilities of DEMS are defined by resources’ operation templates and the transition incidence relation. Based on system specification and NLPP executed in the system, the modular model of DEMS is defined. The required steps for constructing a modular model through the integration of resource models are presented. The proposed approach to modular modelling is illustrated by means of a sample DEMS and an example of NLPP.
Źródło:
Management and Production Engineering Review; 2016, 7, 2; 62-72
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the reliability of photovoltaic-microwind based hybrid power system with battery storage for optimized electricity generation at Tlemcen, north west Algeria
Autorzy:
Hadjidj, Mohammed Salim
Bibi-Triki, Nacereddine
Didi, Faouzi
Powiązania:
https://bibliotekanauki.pl/articles/240901.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modeling
optimization
simulation
photovoltaic system
wind system
hybrid photovoltaic-wind-storage system
sizing
modelowanie
optymalizacja
symulacja
system fotowoltaiczny
wymiarowanie
Opis:
This article considers designing of a renewable electrical power generation system for self-contained homes away from conventional grids. A model based on a technique for the analysis and evaluation of two solar and wind energy sources, electrochemical storage and charging of a housing area is introduced into a simulation and calculation program that aims to decide, based on the optimized results, on electrical energy production system coupled or separated from the two sources mentioned above that must be able to ensure a continuous energy balance at any time of the day. Such system is the most cost-effective among the systems found. The wind system adopted in the study is of the low starting speed that meets the criteria of low winds in the selected region under study unlike the adequate solar resource, which will lead to an examination of its feasibility and profitability to compensate for the inactivity of photovoltaic panels in periods of no sunlight. That is a system with fewer photovoltaic panels and storage batteries whereby these should return a full day of autonomy. Two configurations are selected and discussed. The first is composed of photovoltaic panels and storage batteries and the other includes the addition of a wind system in combination with the photovoltaic system with storage but at a higher investment cost than the first. Consequently, this result proves that is preferable to opt for a purely photovoltaic system supported by the storage in this type of site and invalidates the interest of adding micro wind turbines adapted to sites with low wind resources.
Źródło:
Archives of Thermodynamics; 2019, 40, 1; 161-185
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation of subsidence caused by roadway system
Symulacja numeryczna deformacji powierzchni spowodowanych eksploatacją chodnikową
Autorzy:
Polanin, Piotr
Kowalski, Andrzej
Walentek, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/220269.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
eksploatacja górnicza
system chodnikowy
modelowanie numeryczne
analiza wsteczna
mining
roadway system
numerical modeling
back analysis
Opis:
Exploitation of hard coal seams by roadway system is applied by two coal mines in southern Poland in Upper Silesian Basin. It is a secondary mining exploitation carries out in safety pillars of urban areas and shafts within mining areas of closed coal mines. Roadway system is the excavation process of gateways which are made in parallel order leaving coal pillars between them. An optimal width of coal pillar makes roadway stable and reduces subsidence of terrain surface. The article presents results of subsidence simulation caused by partial extraction using empirical and numerical methods on the example of one exploitation field of “Siltech” coal mine. The asymptotic state of subsidence was considered after mining ceased in the study area. In order to simulate of subsidence, numerical model of rock mass and model of Knothe-Budryk theory were calibrated. Simulation of vertical displacements in numerical method was carried out using RS3 program by Rocscience based on finite element method. The assumption was made that model of rock mass is transversely isotropic medium, in which panels were designed according to order of extraction of coal seams. The results of empirical and numerical methods were compared with measured values of subsidence at benchmarks along drawn lines (subsidence profiles).
Eksploatacja złoża węgla kamiennego systemem chodnikowym jest stosowana w Polsce w Górnośląskim Zagłębiu Węglowym przez dwie kopalnie. Jest to eksploatacja wtórna prowadzona na obszarach górniczych zlikwidowanych kopalń w filarach ochronnych szybów i zabudowy powierzchni. Proces technologiczny polega na drążeniu równoległych do siebie chodników w granicach pól eksploatacyjnych. Pomiędzy wyrobiskami pozostawiane są filary węglowe o odpowiedniej szerokości w celu zapewnienia ich stateczność i minimalizacji deformacji powierzchni terenu. W artykule przedstawiono wyniki symulacji obniżeń terenu spowodowanych eksploatacją częściową przy wykorzystaniu metody empirycznej i modelowania numerycznego na przykładzie jednego pola eksploatacyjnego kopalni „Siltech”. Analiza obejmowała asymptotyczny stan deformacji terenu po zakończonej eksploatacji w tym rejonie. W celu odwzorowania obniżeń terenu wykonano kalibrację numerycznego modelu górotworu i teorii Knothego-Budryka. Symulację obniżeń powierzchni terenu metodą numeryczną (MES) wykonano programem RS3 firmy Rocscience. Założono, że model górotworu jest ośrodkiem transwersalnie izotropowym, w którym odtworzono eksploatację systemem chodnikowym zgodnie z kolejnością wybierania pokładów. Dla wytypowanych punktów obserwacyjnych tworzących ciąg linii porównano obliczone obniżenia metodą empiryczna i numeryczną z wartościami zmierzonymi w terenie.
Źródło:
Archives of Mining Sciences; 2019, 64, 2; 385-397
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integration of Modeling in Solidworks and Matlab/Simulink Environments
Integracja modelowania w środowiskach Matlab/Simulink i SolidWorks
Autorzy:
Cekus, D.
Posiadała, B.
Warys, P.
Powiązania:
https://bibliotekanauki.pl/articles/139642.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
control system
forest crane
modeling
simulation
truck crane
system kontroli
żuraw leśny
analiza
symulacja
dźwig
Opis:
In the paper, the authors present construction stages of simulation models worked out using SolidWorks and Matlab/Simulink environments. As examples of simulation models, a laboratory truck crane and a forest crane have been shown. These models allow for visualization of movements, tracking of the trajectory, velocity and acceleration of any point of the system.
W pracy opisano tok postępowania podczas budowy modeli symulacyjnych z wykorzystaniem programu SolidWorks i Matlab/Simulink. Tworzenie modelu symulacyjnego przebiega etapami, to znaczy najpierw opracowywany jest model geometryczny w programie SolidWorks, następnie dzięki możliwości wymiany danych, model CAD jest implementowany w środowisku obliczeniowym Matlab/Simulink. Modele SimMechanics pozwalają na śledzenie wielu parametrów, np. trajektorii, prędkości, czy przyspieszeń dowolnych elementów układu złożonego. W pracy, jako przykłady modeli symulacyjnych opracowanych zgodnie z zaprezentowaną metodą, pokazano modele laboratoryjnego żurawia samochodowego oraz żurawia leśnego. Modele te umożliwiają wizualizacje zadanego - za pomocą wymuszeń kinematycznych - cyklu pracy.
Źródło:
Archive of Mechanical Engineering; 2014, LXI, 1; 57-74
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement-based harmonic current modeling of mobile storage for power quality study in the distribution system
Autorzy:
Wenge, C.
Guo, H.
Roehrig, C.
Powiązania:
https://bibliotekanauki.pl/articles/140847.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electrical vehicle
harmonic load modeling
harmonic measurement in power system
power quality
power system harmonics
Opis:
Electric vehicles (EVs) can be utilized as mobile storages in a power system. The use of battery chargers can cause current harmonics in the supplied AC system. In order to analyze the impact of different EVs with regardto their number and their emission of current harmonics, a generic harmonic current model of EV types was built and implemented in the power system simulation tool PSS®NETOMAC. Based on the measurement data for different types of EVs three standardized harmonic EV models were developed and parametrized. Further, the identified harmonic models are used by the computation of load flow in a modeled, German power distribution system. As a benchmark, a case scenario was studied regarding a high market penetration of EVs in the year 2030 for Germany. The impact of the EV charging on the power distribution system was analyzed and evaluated with valid power quality standards.
Źródło:
Archives of Electrical Engineering; 2017, 66, 4; 801-814
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics simulation studies on the electric city car with an electromechanical differential and the rear wheels drive
Autorzy:
Kozłowski, M.
Choromański, W.
Powiązania:
https://bibliotekanauki.pl/articles/200706.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electric city car
electromechanical differential
human driver
steer by wire system
MBS modeling
Opis:
Here we present one of the more complex models for studying the stability of driving an electric car with electromechanical differential systems. The purpose of simulation is to choose a structure of the control system for a velocity control on driven wheels (an algorithm of a differential) most appropriate for the driver. This type of goal is particularly important in the case of a disabled driver sitting in a wheelchair. The modeling takes into account both the mechanical and electric structure of the vehicle, and finally the human element - a simple model of human impact on the steer by a wire system. Modeling and simulation have used MBS package (SimMechanics). The results of the simulation have showed the best algorithms of an electromechanical differential for the velocity control of rear drive wheels: with setting a velocity difference or with an average velocity controller in the point A of the centre of a car front axle.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 661-673
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł

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