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Wyświetlanie 1-10 z 105
Tytuł:
Analysis of Economical Lighting of Highways in the Environment of SMOL Language
Autorzy:
Kowalczuk, Z.
Wszołek, J.
Powiązania:
https://bibliotekanauki.pl/articles/220666.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lighting systems
economical factors
engineering systems
monitoring
domain languages
modelling and simulation environment
Opis:
The paper puts forward and implements a method of designing and creating a modelling simulation environment for extensive and complete analysis of economical lighting on highways. From a general design viewpoint, the proposed solution explores the concept of a network description language (SMOL), which has been designed to describe the necessary network functions, mechanisms, and devices for the purpose of their computer simulation and verification. The presented results of the performed research confirm the usability of intelligent lighting on highways, both in the sense of the design concept and in the aspect of saving energy.
Źródło:
Metrology and Measurement Systems; 2017, 24, 3; 473-488
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability analysis of engineering/physical dynamic systems using residual energy function
Autorzy:
Civelek, C.
Powiązania:
https://bibliotekanauki.pl/articles/229956.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stability analysis
residual energy function as Lyapunov function
physical dynamic systems
coupled engineering systems
Opis:
In this article, an engineering/physical dynamic system including losses is analyzed inrelation to the stability from an engineer’s/physicist’s point of view. Firstly, conditions for a Hamiltonian to be an energy function, time independent or not, is explained herein. To analyze stability of engineering system, Lyapunov-like energy function, called residual energy function is used. The residual function may contain, apart from external energies, negative losses as well. This function includes the sum of potential and kinetic energies, which are special forms and ready-made (weak) Lyapunov functions, and loss of energies (positive and/or negative) of a system described in different forms using tensorial variables. As the Lypunov function, residual energy function is defined as Hamiltonian energy function plus loss of energies and then associated weak and strong stability are proved through the first time-derivative of residual energy function. It is demonstrated how the stability analysis can be performed using the residual energy functions in different formulations and in generalized motion space when available. This novel approach is applied to RLC circuit, AC equivalent circuit of Gunn diode oscillator for autonomous, and a coupled (electromechanical) example for nonautonomous case. In the nonautonomous case, the stability criteria can not be proven for one type of formulation, however, it can be proven in the other type formulation.
Źródło:
Archives of Control Sciences; 2018, 28, 2; 201-222
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of distributed parameter nonlinear systems by differential Taylor method
Autorzy:
Abbasov, T.
Herdem, S.
Koeksal, M.
Powiązania:
https://bibliotekanauki.pl/articles/206479.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
filtracja
równania różniczkowe zwyczajne
sterowanie
systemy nieliniowe
absorption
convective diffusion
differential Taylor transform
distributed parameter systems
ecological systems
engineering systems
Opis:
Modelling, solution, control and even design of many ecological and engineering systems involve dealing with nonlinear partial differential equations of which analytic solutions are rarely available and numerical approach with or without linearization, or approximation is inevitable most of the time. In this paper the possibility of analysing such systems by using a fairly new method known as Differential Taylor (DT) Transform and its advantages are proved. The results obtained by this method are compared with the experimental results and shown to be within good agreement with them. It is emphasised that DT Transform is not effective for only filtration systems, but can also be used equally well for absorption, heat and mass transfer, convective diffusion and similar systems.
Źródło:
Control and Cybernetics; 1999, 28, 2; 259-267
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engineering sustainable complex systems
Autorzy:
Ahram, T. Z.
Karwowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/406952.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
systems engineering
sustainability
human factors
human systems integration
complex systems
Opis:
Given the most competitive nature of global business environment, effective engineering innovation is a critical requirement for all levels of system lifecycle development. The society and community expectations have increased beyond environmental short term impacts to global long term sustainability approach. Sustainability and engineering competence skills are extremely important due to a general shortage of engineering talent and the need for mobility of highly trained professionals [1]. Engineering sustainable complex systems is extremely important in view of the general shortage of resources and talents. Engineers implement new technologies and processes to avoid the negative environmental, societal and economic impacts. Systems thinking help engineers and designers address sustainable development issues with a global focus using leadership and excellence. This paper introduces the Systems Engineering (SE) methodology for designing complex and more sustainable business and industrial solutions, with emphasis on engineering excellence and leadership as key drivers for business sustainability. The considerable advancements achieved in complex systems engineering indicate that the adaptation of sustainable SE to business needs can lead to highly sophisticated yet widely useable collaborative applications, which will ensure the sustainability of limited resources such as energy and clean water. The SE design approach proves critical in maintaining skills needed in future capable workforce. Two factors emerged to have the greatest impact on the competitiveness and sustainability of complex systems and these were: improving skills and performance in engineering and design, and adopting SE and human systems integration (HSI) methodology to support sustainability in systems development. Additionally, this paper provides a case study for the application of SE and HSI methodology for engineering sustainable and complex systems.
Źródło:
Management and Production Engineering Review; 2013, 4, 4; 4-14
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radialne drgania grubościennego kulistego zbiornika w ośrodku liniowo-sprężystym obciążonego wewnętrznym ciśnieniem produktów wybuchu. Cz. 1, Rozważania teoretyczne
Radial vibrations of a thick-walled spherical reservoir loaded with internal pressure into a linear elastic medium. Part 1, Theoretical considerations
Autorzy:
Włodarczyk, E.
Fikus, B.
Powiązania:
https://bibliotekanauki.pl/articles/210065.pdf
Data publikacji:
2013
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
dynamika ośrodków ciągłych
drgania układów ciągłych
tłumienie dywergentne
dynamics of continuous media
vibrations of engineering systems
divergent damping
Opis:
Rozwiązano analitycznie problem drgań grubościennego zbiornika kulistego umieszczonego w ośrodku liniowo-sprężystym, wymuszonych wewnętrznym ciśnieniem produktów wybuchu. Określono wpływ dywergentnego transportu energii przez ekspandującą falę naprężeń od zbiornika do otaczającego ośrodka. Redukując grubość ścianki zbiornika do zera (β = 1), uzyskano jako przypadek szczególny rozwiązanie problemu ekspansji kulistej fali naprężeń w ośrodku sprężystym. Prezentowane rozwiązanie ma walory poznawcze i aplikacyjne. Między innymi pozwala oszacować tłumienie amplitudy drgań zbiornika, wywołanych na przykład awaryjnym wybuchem, przez otaczający go ściśliwy ośrodek.
The problem of radial vibrations of a thick-walled spherical reservoir, loaded with internal pressure of explosion products has been solved here in analytical, closed form. The reservoir is insertem inside an isotropic linear elastic medium. The influence of divergent transport of the energy by expanding stress wave from the reservoir to the surrounding medium is considered. The solution of the problem of the expanding spherical stress wave in linear elastic medium has been obtained here, as a particular case, by reducing the thickness of the reservoir wall to zero value (β = 1). The presented solution Has cognitive and applicable values. For example, it makes possible evaluation of damping of a vibration amplitude of the reservoir wall by surrounding medium during damage explosion.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2013, 62, 3; 157-170
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oznaczenie charakterystyk mięśniowych w trakcie ćwiczeń na wioślarzu treningowym z wykorzystaniem systemu pomiarowego MGC PLUS – CATMAN
Determination of the characteristics of the muscle during exercise on the rowing training with the use of MGC PLUS - CATMAN measuring system
Autorzy:
Łagan, S.
Kalwarska, M.
Powiązania:
https://bibliotekanauki.pl/articles/261200.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki. Katedra Inżynierii Biomedycznej
Tematy:
moment siły mięśnia
systemy inżynierskie
muscle torque
systems engineering
Opis:
W pracy zaprezentowano możliwość wykorzystania inżynierskiego systemu pomiarowego MGC PLUS wraz z oprogramowaniem CATMAN do oceny wielkości momentów sił mięśniowych rozwijanych podczas ćwiczeń na przyrządzie typu wioślarz treningowy. W celu poprawy możliwości pomiarowych wykonano modernizację przyrządu, zaopatrując go w czujniki siły oraz przemieszczeń. Badaniom poddano 25 osób obojga płci, w wieku 20–24 lat, studentów inżynierii biomedycznej celem określenia przydatności przyrządu do monitorowania zmian charakterystyk mięśni.
The paper presents the possibility of using the engineering measuring system MGC PLUS with software CATMAN for estimating the moments of muscle forces developed during exercises on the instrument type rowing training. In order to be able to upgrade the instrument of measurement was performed, providing him with force and displacement sensors. The study involved 25 people of both sexes, aged 20–24 years, biomedical engineering students to determine the suitability of the instrument to monitor changes of the muscle characteristics.
Źródło:
Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna; 2013, 19, 1; 12-23
1234-5563
Pojawia się w:
Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Auto mission planning system design for imaging satellites and its applications in environmental field
Autorzy:
He, Y.
Wang, Y.
Chen, Y.
Xing, L.
Powiązania:
https://bibliotekanauki.pl/articles/258754.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
systems engineering
imaging satellite
meteorological monitoring
space-ground integration
Opis:
Satellite hardware has reached a level of development that enables imaging satellites to realize applications in the area of meteorology and environmental monitoring. As the requirements in terms of feasibility and the actual profit achieved by satellite applications increase, we need to comprehensively consider the actual status, constraints, unpredictable information, and complicated requirements. The management of this complex information and the allocation of satellite resources to realize image acquisition have become essential for enhancing the efficiency of satellite instrumentation. In view of this, we designed a satellite auto mission planning system, which includes two sub-systems: the imaging satellite itself and the ground base, and these systems would then collaborate to process complicated missions: the satellite mainly focuses on mission planning and functions according to actual parameters, whereas the ground base provides auxiliary information, management, and control. Based on the requirements analysis, we have devised the application scenarios, main module, and key techniques. Comparison of the simulation results of the system, confirmed the feasibility and optimization efficiency of the system framework, which also stimulates new thinking for the method of monitoring environment and design of mission planning systems.
Źródło:
Polish Maritime Research; 2016, S 1; 59-70
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modular distributed models of production systems: a Petri nets based approach
Autorzy:
Davidrajuh, Reggie
Krenczyk, Damian
Skolud, Bożena
Powiązania:
https://bibliotekanauki.pl/articles/2204530.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
production engineering systems
sustainability
modular Petri nets
Petri Modules
GPenSIM
zrównoważony rozwój
moduły Petriego
system inżynierii produkcji
sieci Petriego modułowe
Opis:
Modeling and simulation are key performance analysis and control techniques to optimize decision-making as well as design and operate complex production systems. They are also indicated as one of the technological pillars of modern industry and IT solutions supporting the implementation of the roadmap toward Industry 4.0 in the areas of digital transformation and automation. In the context of the required rapid transformation of today’s enterprises, it becomes extremely important to look for solutions that allow the use of the existing infrastructure, information, and energy, so as to minimize the negative impact of new technologies and the transformation process itself on the environment. The article presents an approach to modeling large and complex production systems with the use of distributed Petri net models allowing the use of the possessed IT infrastructure as consistent with the idea of sustainable development in the activities of enterprises. This eliminates two major problems that render traditional models unusable. The first is related to the difficulties in analyzing and verifying models of enormous size and infinite space of states. The second is related to the required computing power, if such analyzes are to be performed on one computing unit, which would force the producers to replace the IT infrastructure. For this purpose, modular Petri nets are introduced. Other benefits of modularization, such as smaller components that can be independently analyzed, are also presented in the paper. The proposed modular Petri net has been implemented in the proprietary GPenSIM software. The paper is complemented by a practical example of industrial modeling of production systems with automated guided vehicles (AGVs) using the Modular Model with Intelligent Petri Modules.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e144621
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kompensacja mocy nieaktywnych w kopalnianych układach elektroenergetycznych w oparciu o teorię składowych fizycznych prądu
Non-active power compensation in the mining electrical power engineering systems based on the theory of currents. physical components
Autorzy:
Wosik, J.
Hefczyc, M.
Powiązania:
https://bibliotekanauki.pl/articles/186480.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG
Tematy:
kompensacja mocy nieaktywnych
kopalniane układy elektroenergetyczne
sieci dołowe
compensation of non-active power
mining electrical power engineering systems
underground networks
Opis:
W referacie scharakteryzowano kopalniane układy elektroenergetyczne wraz ze stosowanymi dotychczas układami kompensacyjnymi w sieciach dołowych. Wskazano na zagrożenia, jakie wprowadzają przekształtniki mocy w tego typu sieciach dla pracy klasycznych układów kompensacyjnych i transformatorów. Przedstawiono zarys teorii mocy chwilowej p-q oraz teorii składowych fizycznych prądu (CPC), które mogą być podstawą prowadzenia aktywnej kompensacji mocy biernej.
Mining electrical power engineering systems including until now used compensation systems in the underground networks have been characterized in the paper. There have been shown the risks for operation of classic compensation systems and transformers caused by use of power converters in such networks. There has been given an overview of the theory of instantaneous power p-q and the Theory of Currents. Physical Components (CPC), which can be a basis of active implementation of the reactive power compensation.
Źródło:
Mechanizacja i Automatyzacja Górnictwa; 2009, R. 47, nr 7, 7; 125-132
0208-7448
Pojawia się w:
Mechanizacja i Automatyzacja Górnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systems Engineering in SMEs – A Case of RFID Solutions Provider
Autorzy:
Buczacki, A.
Gladysz, B.
Powiązania:
https://bibliotekanauki.pl/articles/2064952.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
Radio Frequency Identification
RFID
Systems Engineering
SE
Small & Medium Enterprise
SME
Opis:
Systems engineering (SE) is a well-known approach used for management of the development process of big and complex technical systems / products (usually) by large companies. There are a few initiatives of SE application for different industries as well as new SE standard development for small and medium enterprises (SMEs). Radio Frequency Identification (RFID) systems are a good example of systems development of which could be approached using systems engineering. In this paper, a case of an SME - a solution provider and system integrator of RFID systems is discussed, to discover how it is dealing with SE problems and issues. The paper also presents potential benefits arising from the utilization of SE in this type of projects realized by the SME in question.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 249--255
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 105

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