Temat: dynamic system - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Parallel Digraphs-building Computer Algorithm for Finding a Set of Characteristic Polynomial Realisations of Dynamic System
Autorzy:: Hryniów, K.
Markowski, K. A.
Tematy:: dynamic system
GPGPU
characteristic polynomial
digraphs
algorithm; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:: https://bibliotekanauki.pl/articles/384585.pdf Link otwiera się w nowym oknie
Opis:: This paper presents in-depth the parallel computer algorithm for the determination of characteristic polynomial realisations of dynamic system. The main differences between the depicted method and other state of- the-art solutions include finding not few realisations, but a whole set, and the fact that the found realisations are always minimal among all possible. As digraphsbuilding methods used in the algorithm are NP-complete or NP-hard problems, the algorithm is paralleled and GPGPU (General-Purpose computing on Graphics Processor Units) computation is proposed as the only feasible solution. The article describes in detail the proposed method, discusses it’s complexity, presents optimisation solutions and still open problems. The working algorithm is illustrated with a numerical example and compared to results of other known methods.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Robust microgrids for distribution systems with high solar photovoltaic penetration
Autorzy:: Sampath, Ediriweera W.E.P.
Lidula, N.W.A.
Herath, H. Dayan B.P.
Tematy:: converter
dynamic system
robustness
stability
synchronous generators; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/27309941.pdf Link otwiera się w nowym oknie
Opis:: A microgrid is an appropriate concept for urban areas with high penetration of renewable power generation, which improves the reliability and efficiency of the distribution network at the consumer premises to meet various loads such as domestic, industrial, and agricultural types. Microgrids comprising inverter-based and synchronous generator-based distribution generators can lead to the instability of the system during the islanded mode of operation. This paper presents a study on designing stable microgrids to facilitate higher penetration of solar power generation into a distribution network. A generalized small signal model is derived for a microgrid with static loads, dynamic loads, energy storages, solar photovoltaic (PV) systems, and diesel generators, incorporating the features of dynamic systems. The model is validated by comparing the transient curves given by the model and a transient simulator subjected to step changes. The result shows that full dynamic models of complex systems of microgrids can be built accurately, and the proposed microgrid is stable for all the considered loading situations and solar PV penetration levels according to the small signal stability analysis.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Conditions for Digraphs Representation of the Characteristic Polynomial
Autorzy:: Hryniów, Krzysztof
Markowski, Konrad Andrzej
Wydawca:: Foundation for Young Scientists
Opis:: Konrad A. MARKOWSKI
This paper presents additional conditions that are needed to create proper digraphs representation of the characteristic polynomial. Contrary to currently used methods (like canonical forms) digraphs representations allow to find a complete set of all possible realisations instead of only a few realisations. In addition, all realisations in the set are minimal. Proposed additional conditions on creating digraphs representations allow faster creation of representations by restricting the creations of representations that are not proper and would have to be removed in later steps of algorithm.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 4.

Tytuł:: The Issue of Data Exchange in the UHF Band RFID System with an Semi-Passive Transponder
Autorzy:: Gotfryd, M.
Lichoń, W.
Pawłowicz, B.
Tematy:: RFID
dynamic system
data exchange
semi-passive transponder; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/963901.pdf Link otwiera się w nowym oknie
Opis:: The article discusses the specifics of data exchange in the UHF band RFID systems using semi-passive transponders. In addition to the antenna and the RFID chip, there is also an additional source of energy (eg. battery) in the structure of such transponder. The battery may be used to implement additional functions such as the ability to measure physical quantities (eg. temperature, humidity). In this regard, particular attention was paid to the discussion of phases of communication between transponder and RWD associated with additional data (measurement results). An analysis of transmitted data frames has been presented. The preliminary results of the measurements have shown that the number of memory block transmitted from transponder has an impact on the effectiveness of RFID system.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Nonlinear dynamic system and built environment – basic premises
Nieliniowy system dynamiczny i środowisko zbudowane - podstawowe założenia
Autorzy:: Bil, J. S.
Tematy:: architecture
chaos
nonlinear dynamic system
architektura
nieliniowy system dynamiczny; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/369827.pdf Link otwiera się w nowym oknie
Opis:: The system of impact of an object of architecture is a non-linear dynamic system, which also makes it a chaotic deterministic system. If we introduce into the system all impacts and system agent functions possible to identify, we can propose an estimated simulation of the life cycle of the entire object over time.
Układ oddziaływań obiektu jest nielinearnym układem dynamicznym, więc jest chaotycznym układem deterministycznym. Wprowadzając do systemu wszystkie możliwe do zdefiniowania oddziaływania i funkcje agentów systemu, można w przybliżeniu uzyskać symulację życia całego obiektu.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Disruptions to sustainable city functioning as a result of destructive deviations in architecture
Zakłócenia w zrównoważonym funkcjonowaniu miasta w wyniku destrukcyjnych wypaczeń w architekturze
Autorzy:: Fomenko, Oksana
Izbash, Andrey
Tematy:: architecture
city
dynamic system
destructive deviation
sustainability
crisis; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/370644.pdf Link otwiera się w nowym oknie
Opis:: The article puts forward a hypothesis about the role and the place of “destructive deviations” in identifying indicators of crises that a city is going through, in the processes of its functioning as a complex dynamic system. It also proposes a hypothesis about classification of “destructive deviations” in architecture according to their type and development scenario. The problems of their influence on the transition of a city from a steady state to a crisis and a possible catastrophe are considered. The characteristics of a city system development are viewed in the context of interaction between the forces of stability (order) and changes (development). At the same time, the fact of inevitability of intersystem conflicts in such a complex formation as a city is regarded as obvious. In the conducted study, the concept of “Destructive deviations” is part of the method of identifying “Crisis indicators” , which, in turn, is necessary to create a model complex designed for modeling, analyzing and managing the architectural component of a city as a dynamic system.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Algebraic condition for decomposition of large-scale linear dynamic systems
Autorzy:: Górecki, H.
Tematy:: rozkład
warunek algebraiczny
system dynamiczny
decomposition
algebraic condition
dynamic system; Pokaż więcej
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Powiązania:: https://bibliotekanauki.pl/articles/907869.pdf Link otwiera się w nowym oknie
Opis:: The paper concerns the problem of decomposition of a large-scale linear dynamic system into two subsystems. An equivalent problem is to split the characteristic polynomial of the original system into two polynomials of lower degrees. Conditions are found concerning the coefficients of the original polynomial which must be fulfilled for its factorization. It is proved that knowledge of only one of the symmetric functions of those polynomials of lower degrees is sufficient for factorization of the characteristic polynomial of the original large-scale system. An algorithm for finding all the coefficients of the decomposed polynomials and a general condition of factorization are given. Examples of splitting the polynomials of the fifth and sixth degrees are discussed in detail.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Application of multibody simulation for semitrailer optimization
Autorzy:: Korta, J.
Martowicz, A.
Gallina, A.
Uhl, T.
Tematy:: multibody dynamic system
response surface
design of experiment
sensitivity analysis; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/247963.pdf Link otwiera się w nowym oknie
Opis:: This paper presents an approach of optimization of a truck semitrailer suspension system, with utilization of multibody model; its purpose was to find the best values of operational parameters: stiffness and damping factors, in order to minimize the disadvantageous influence of force distribution in the high risk areas, where preceding strength analysis has pointed out dangerous load values. The model contains elements of two different types: flexible and rigid bodies, in purpose of increasing the accuracy level of conducted numerical calculations. A number of simulations with different parameters and under different load cases have been carried out, combined with a parametric and structural sensitivity analysis, what has enabled an estimation of individual factors influencing particular forces that have been the objectives of optimization procedure. The stiffness and damping coefficients of the construction suspension system have been adjusted by applying metamodeling techniques. Basing on the chosen design of experiment results, this procedure allows for an approximation of the behaviour of the analysed construction in the whole design space. In this process, two different approaches have been used: Kriging and polynomial regression, and both have been compared to the simulations results. Finally, using a desirability function, the most optimal solution has been found.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Modelling and control of discrete-event systems using petri nets and arduino microcontrollers
Autorzy:: Kučera, Erik
Haffner, Oto
Leskovský, Roman
Tematy:: hybrid system
Petri nets
microcomputer‐based control
motor
discrete event dynamic system; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:: https://bibliotekanauki.pl/articles/1837370.pdf Link otwiera się w nowym oknie
Opis:: The main aim of proposed article is the design of new software system for modelling and control of discrete‐event and hybrid systems using Arduino and similar microcontrollers. In this paper we propose a new tool. It is based on Petri nets and it is called PN2ARDUINO. It offers a capability of communication with the microcontroller. Communication with the microcontroller is based on modified Firmata protocol so control algorithm can be implemented on all microcontrollers that support this type of protocol. The developed software tool was successfully verified for control of laboratory systems. It can also be used for education and also for research purposes as it offers a graphical way for designing control algorithm for hybrid and mainly discrete‐event systems. Proposed tool can enrich education and practice in the field of cyberphysical systems (Industry 4.0).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Mathematical model of identification and automation the process of shaft machining in elastic-deformable condition
Autorzy:: Taranenko, V.
Świć, A.
Tematy:: model
dynamic system
shaft
elastic deformable condition
operational transmittance
regulator; Pokaż więcej
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Powiązania:: https://bibliotekanauki.pl/articles/117860.pdf Link otwiera się w nowym oknie
Opis:: The specification of the low rigidity parts machining process is consider by introducing suitable equations of constrains, which describe additional elastic deformations in one of equations describing the force controlling influence. This paper introduces general and detailed mathematical models of the DS of turning the longitudinal, low rigidity shafts. Research results and examples of their approximation were introduced. Some method of synthesis and examples structure of regulator P were shown for one detailed model of DS under received approximated operational transmittance of DS. The way of controlling the accuracy of shafts turning in the elastic deformable condition and controlling system was described.
Dostawca treści:: Biblioteka Nauki

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