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Wyświetlanie 1-15 z 16
Tytuł:
Decentralized structural control approach for Petri nets
Autorzy:
Aybar, A.
Powiązania:
https://bibliotekanauki.pl/articles/969777.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
discrete event systems
Petri nets
decentralized control
structural controller
Opis:
The structural controller, described by adding the control places to the Petri nets, is introduced in this work to lead the Petri net to the desired marking vectors. An algorithm (Algorithm I) is developed to determine the control places for the given Petri net. The connections and the initial marking of each control place are determined in this algorithm. Moreover, a decentralized structural control approach, based on overlapping decompositions, is introduced in this work. In this decentralized approach, all disjoint Petri subnets, which are obtained by using overlapping decompositions, are determined. The control places for each Petri subnet are determined by using the given algorithm. Then, the control places for the orginal Petri net are obtained by the control places of each PSN by another algorithm (Algorithm II) and these places are added to the orginal Petri net. Therefore, a decentralized structural controller which guarantees to lead the Petri net to the desired marking vectors is obtained.
Źródło:
Control and Cybernetics; 2007, 36, 1; 143-159
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A computational scheme for decentralized time-optimal resource allocation in a sequence of projects of activities under constrained resource
Autorzy:
Stankiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/411126.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
project of activities
resource allocation
time-optimal control
dynamical system
decentralized control
Opis:
We consider a sequence of projects of independent activities; each project composed of activities available for realization at the same time. It is assumed that the activities are continuous dynamical systems whose dynamics depend continuously on the allotted amounts of the resource, and the initial and terminal states are fixed. The problem is to allocate a renewable, continuously divisible resource (e.g., power, fuel flow, money per time unit, approximate manpower) to the activities in order to minimize the performance time of the sequence of projects under the assumption that the allowable level of the total usage of the resource is constant. Although the solution to this problem is known in the literature, nevertheless there is a lack of effective computational algorithms for the time-optimal resource allocation, especially in the case of really large projects. In this paper a decentralized two-level control scheme using the time-decomposition is proposed to find the time-optimal resource allocation in a sequence of projects. The price mechanism is applied to coordinate the lower level tasks of the optimal resource allocation in the successive time intervals determined by the moments at which the successive projects are available for realization. Necessary and sufficient conditions to ensure the determination of the optimal resource allocation according to the method proposed are stated. The problems connected with the numerical realization of the scheme are discussed and the resulting computer algorithm is outlined.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2016, 5, 3; 83-94
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of robust multi-loop PI controller for improved disturbance rejection with constraint on minimum singular value
Autorzy:
Arun, Pathiran
Muniraj, Rathinam
Boselin Prabhu, S.R.
Jarin, T.
Willjuice Iruthayarajan, M.
Powiązania:
https://bibliotekanauki.pl/articles/27324013.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
multi-loop PI controller
multivariable system
decentralized control
disturbance rejection
robust stability
Opis:
Disturbance rejection performance optimization with constraints on robustness for a multivariable process is commonly encountered in industrial control applications. This paper presents the tuning of a multi-loop Proportional Integral (PI) controller method to enhance the performance of load disturbance rejection using evolutionary optimization. The proposed design methodology is formulated to minimize the load disturbance rejection response and the input control energy under the constraints of robust stability. The minimum singular value of multiplicative uncertainty is considered a multi-loop system robust stability indicator. Optimization is performed to achieve the same, or higher level than the most-explored Direct Synthesis (DS) based multi-loop PI controller, which is derived from a conventional criterion. Simulation analysis clearly proved that the proposed multi-loop PI controller tuning method gives better disturbance rejection, and either, the same or a higher level of robust stability when compared to the DS-based multi-loop PI controller.
Źródło:
Archives of Control Sciences; 2023, 33, 4; 839--859
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decentralized Variable Structure Tracking for Systems With Time-Domain Dominance
Autorzy:
Balluchi, A.
Bicchi, A.
Powiązania:
https://bibliotekanauki.pl/articles/908303.pdf
Data publikacji:
1999
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
warunek dominujący
sterowanie
sterowanie rozproszone
dominance conditions
decentralized control
robust control
variables structure control (VSC)
Opis:
In this paper, we consider the design of tracking controllers for linear MIMO systems described by an input-output model. The presence of known 'weak' interactions among SISO or MIMO subsystems may allow the designer to achieve objectives by using independent controllers of lower complexity than are necessary in general (control decentralization problem). Sufficient conditions for asymptotic tracking employing decentralized variable structure techniques are derived. The condition is shown to be closely related to (and in a sense, a time-domain counterpart of) dominance criteria used in frequency-domain techniques, as they have developed out of Rosenbrock's original diagonal dominance concept. The synthesis of a decentralized variable-structure controller for asymptotic tracking is illustrated for systems obeying some conditions on their nominal relative degrees.
Źródło:
International Journal of Applied Mathematics and Computer Science; 1999, 9, 2; 265-291
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pairwise control principle in large-scale systems
Autorzy:
Filasova, A.
Krokavec, D.
Powiązania:
https://bibliotekanauki.pl/articles/229965.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
decentralized control
large-scale systems
state feedback
linear matrix inequality
asymptotic stability
Opis:
The purpose of the paper is present an algorithm of partially decentralized control design for one type of large-scale linear dynamical system. The pairwise autonomous principle is preferred where design conditions are derived in the bounded real lemma form, and global system stability is reproven to formulate potential application principle in fault tolerant control. The validity of the proposed method is demonstrated by the numerical example.
Źródło:
Archives of Control Sciences; 2011, 21, 3; 227-242
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust output feedback Model Predictive Control design
Autorzy:
Vesely, V.
Rosinova, D.
Powiązania:
https://bibliotekanauki.pl/articles/229853.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
model predictive control
robust control
parameter dependent quadratic stability
Lyapunov functional
polytopic system
decentralized control
Opis:
The paper addresses the problem of designing a robust output/state model predictive control for linear polytopic systems without constraints. The new robust BMI stability condition for given predictive and control horizon is derived which guarantees the parameter dependent quadratic stability and guaranteed cost.The proposed condition is appropriate for centralized and decentralized control design, as illustrated on example.
Źródło:
Archives of Control Sciences; 2010, 20, 3; 303-316
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nash equilibrium design and price-based coordination in hierarchical systems
Autorzy:
Karpowicz, M. P.
Powiązania:
https://bibliotekanauki.pl/articles/331251.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
równowaga Nasha
system hierarchiczny
sterowanie rozproszone
Nash equilibrium
coordination in hierarchical systems
decentralized control
asymmetric information
Opis:
This paper deals with the problem of designing Nash equilibrium points in noncooperative games in which agents anticipate values of Lagrange multipliers coordinating their payoff functions. The addressed model of agents' interactions, referred to as the price-anticipation game, is studied within the framework of coordination and mechanism design theory for hierarchical systems. Sufficient conditions are formulated for Nash implementation of a regular and isolated solution to a coordination problem. An equilibrium design procedure is proposed and applied as an analytic tool in a study of mechanism design games. In the setting considered the well-known fact is demonstrated that gains from reaching a desired solution to a coordination problem in a Nash equilibrium point need not balance the overall costs of its implementation. However, it is also demonstrated how these costs can be distributed among the agents and related to the particular organization of interactions in the system. Finally, application of the developed framework in the field of Internet traffic engineering is presented.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2012, 22, 4; 951-969
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decentralized PID control by using GA optimization applied to a quadrotor
Autorzy:
Hasseni, S. E. I.
Abdou, L.
Powiązania:
https://bibliotekanauki.pl/articles/384905.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
quadrotor
non-linear systems
decentralized control
PID
optimization
genetic algorithm
systemy nieliniowe
kontrola zdecentralizowana
optymalizacja
algorytm genetyczny
Opis:
Quadrotors represent an effective class of aerial robots because of their abilities to work in small areas. We suggested in this research paper to develop an algorithm to control a quadrotor, which is a nonlinear MIMO system and strongly coupled, by a linear control technique (PID), while the parameters are tuned by the Genetic Algorithm (GA). The suggested technique allows a decentralized control by decoupling the linked interactions to effect angles on both altitude and translation position. Moreover, the using a meta-heuristic technique enables a certain ability of the system controllers design without being limited by working on just the small angles and stabilizing just the full actuated subsystem. The simulations were implemented in MATLAB/Simulink tool to evaluate the control technique in terms of dynamic performance and stability. Although the controllers design (PID) is simple, it shows the effect of the proposed technique in terms of tracking errors and stability, even with large angles, subsequently, high velocity response and high dynamic performances with practically acceptable rotors speed.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 2; 33-44
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A matrix inequality based design method for consensus problems in multi-agent systems
Autorzy:
Zhai, G.
Okuno, S.
Imae, J.
Kobayashi, T.
Powiązania:
https://bibliotekanauki.pl/articles/930012.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
system wieloagentowy
konsensus
sterowanie zdecentralizowane
nierówność macierzy
LMI
multi-agent systems
consensus
decentralized control
graph Laplacian
matrix inequality
Opis:
In this paper, we study a consensus problem in multi-agent systems, where the entire system is decentralized in the sense that each agent can only obtain information (states or outputs) from its neighbor agents. The existing design methods found in the literature are mostly based on a graph Laplacian of the graph which describes the interconnection structure among the agents, and such methods cannot deal with complicated control specification. For this purpose, we propose to reduce the consensus problem at hand to the solving of a strict matrix inequality with respect to a Lyapunov matrix and a controller gain matrix, and we propose two algorithms for solving the matrix inequality. It turns out that this method includes the existing Laplacian based method as a special case and can deal with various additional control requirements such as the convergence rate and actuator constraints.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2009, 19, 4; 639-646
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A decentralized control strategy to bring back frequency and share reactive power in isolated microgrids with virtual power plant
Autorzy:
Khanjanzadeh, Amir
Soleymani, Soodabeh
Mozafari, Babak
Powiązania:
https://bibliotekanauki.pl/articles/2173517.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PFDC
power-frequency droop control
VPP
virtual power plant
microgrid
virtual impedance
decentralized control
kontrola spadku częstotliwości zasilania
elektrownia wirtualna
mikrosieci
wirtualna impedancja
zdecentralizowana kontrola
Opis:
In this paper, a novel Power-Frequency Droop Control (PFDC) is introduced to perfectly bring back the system frequency and share the reactive power in isolated microgrid with virtual power plant (VPP). The frequency-based power delivery must be essentially implemented in VPP which can operate as a conventional synchronous generator. It has been attained by enhancing the power processing unit of each VPP to operate as an active generator. The inverter coupling impedance which has been assigned by the virtual impedance technique has reduced the affected power coupling resulting from line resistance. The reference has been subsequently adjusted to compensate the frequency deviation caused by load variation and retrieve the VPP frequency to its nominal value. In addition, the line voltage drop has compensated the voltage drop and load sharing error to obliterate the reactive power sharing imprecision resulting from the voltage deviation. The voltage feedback confirms the correct voltage after compensating the voltage drop. As an illustration, conventional PFDC after a load change cannot restore the system frequency which is deviated from 50 Hz and rested in 49.9 Hz while, proposed PFDC strategy fades away the frequency deviation via compensating the variation of the frequency reference. Likewise, the frequency restoration factor ( γ) has an effective role in retrieving the system frequency, i.e., the restoration rate of the system frequency is in proportion with γ. As a whole, the simulation results have pointed to the high performance of proposed strategy in an isolated microgrid.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136190, 1--9
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A decentralized control strategy to bring back frequency and share reactive power in isolated microgrids with virtual power plant
Autorzy:
Khanjanzadeh, Amir
Soleymani, Soodabeh
Mozafari, Babak
Powiązania:
https://bibliotekanauki.pl/articles/2090692.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PFDC
power-frequency droop control
VPP
virtual power plant
microgrid
virtual impedance
decentralized control
kontrola spadku częstotliwości zasilania
wirtualna elektrownia
mikrosieci
wirtualna impedancja
zdecentralizowana kontrola
Opis:
In this paper, a novel Power-Frequency Droop Control (PFDC) is introduced to perfectly bring back the system frequency and share the reactive power in isolated microgrid with virtual power plant (VPP). The frequency-based power delivery must be essentially implemented in VPP which can operate as a conventional synchronous generator. It has been attained by enhancing the power processing unit of each VPP to operate as an active generator. The inverter coupling impedance which has been assigned by the virtual impedance technique has reduced the affected power coupling resulting from line resistance. The reference has been subsequently adjusted to compensate the frequency deviation caused by load variation and retrieve the VPP frequency to its nominal value. In addition, the line voltage drop has compensated the voltage drop and load sharing error to obliterate the reactive power sharing imprecision resulting from the voltage deviation. The voltage feedback confirms the correct voltage after compensating the voltage drop. As an illustration, conventional PFDC after a load change cannot restore the system frequency which is deviated from 50 Hz and rested in 49.9 Hz while, proposed PFDC strategy fades away the frequency deviation via compensating the variation of the frequency reference. Likewise, the frequency restoration factor ( γ) has an effective role in retrieving the system frequency, i.e., the restoration rate of the system frequency is in proportion with γ. As a whole, the simulation results have pointed to the high performance of proposed strategy in an isolated microgrid.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136190, 1--9
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Input-output pairing criterion applied in the genetic algorithm for unstable linear systems
Autorzy:
Baban, P. Q.
Rahimabadi, I. N.
Powiązania:
https://bibliotekanauki.pl/articles/200621.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
decentralized control
input-output pairing
unstable plant
relative error matrix
genetic algorithm
sterowanie zdecentralizowane
parowanie wejścia-wyjścia
niestabilność roślin
błąd względny macierzy
algorytm genetyczny
Opis:
In this paper, a new approach towards input-output pairing for an unstable system has been proposed. First, it is demonstrated that the previous method of input-output pairing for unstable plants cannot find appropriate pairs as it only checks necessary conditions for stability and integrity. Then, a new approach using relative error matrix and genetic algorithm for finding appropriate pairs in unstable systems is proposed. As it is shown, this approach takes into consideration both static and dynamic information of plant in measuring interaction. Finally, the accuracy of proposed method is demonstrated by an example and closed loop simulation.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 4; 873-876
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automation of analytical model construction for intellectual superstructure in next generation networks
Autorzy:
Pustovyi, B.
Powiązania:
https://bibliotekanauki.pl/articles/118337.pdf
Data publikacji:
2018
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
intellectual services
Markov model
analytical model
ngn
intellectual superstructure
centralized control principle
decentralized control principle
usługi intelektualne
model Markowa
model analityczny
nadbudowa intelektualna
zasada scentralizowanej kontroli
zasada zdecentralizowanej kontroli
Opis:
The software is suggested for automation of analytical model construction for intellectual superstructure in next generation networks. The software is designed for automation of the system probable states calculation, the construction of the Markov process transition graph and generation of equations system to determine stationary probabilities. An example of analytical model construction is represented for intellectual superstructure with centralized control principle.
Zaproponowano oprogramowanie do zautomatyzowania analitycznego modelu budowy intelektualnej nadbudowy w sieciach następnej generacji. Oprogramowanie jest przeznaczone do automatyzacji obliczania stanów prawdopodobieństwa systemu, konstrukcji wykresu przejścia procesu Markowa i generowania układu równań w celu ustalenia stacjonarnych prawdopodobieństw. Przykład konstrukcji modelu analitycznego jest reprezentowany dla nadbudowy intelektualnej z zasadą scentralizowanej kontroli.
Źródło:
Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej; 2018, 12; 49-60
1897-7421
Pojawia się w:
Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Joint queue-perturbed and weakly coupled power control for wireless backbone networks
Autorzy:
Olwal, T. O.
Djouani, K.
Kogeda, O. P.
van Wyk, B. J.
Powiązania:
https://bibliotekanauki.pl/articles/330956.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
sterowanie mocą
sterowanie rozproszone
sieć szkieletowa
sterowanie optymalne
decentralized power control
singular perturbation theory
weak coupling theory
wireless backbone networks
optimal control theory
Opis:
Wireless Backbone Networks (WBNs) equipped with Multi-Radio Multi-Channel (MRMC) configurations do experience power control problems such as the inter-channel and co-channel interference, high energy consumption at multiple queues and unscalable network connectivity. Such network problems can be conveniently modelled using the theory of queue perturbation in the multiple queue systems and also as a weak coupling in a multiple channel wireless network. Consequently, this paper proposes a queue perturbation and weakly coupled based power control approach for WBNs. The ultimate objectives are to increase energy efficiency and the overall network capacity. In order to achieve this objective, a Markov chain model is first presented to describe the behaviour of the steady state probability distribution of the queue energy and buffer states. The singular perturbation parameter is approximated from the coefficients of the Taylor series expansion of the probability distribution. The impact of such queue perturbations on the transmission probability, given some transmission power values, is also analysed. Secondly, the inter-channel interference is modelled as a weakly coupled wireless system. Thirdly, Nash differential games are applied to derive optimal power control signals for each user subject to power constraints at each node. Finally, analytical models and numerical examples show the efficacy of the proposed model in solving power control problems in WBNs.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2012, 22, 3; 749-764
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decentralized design of interconnected H infinity feedback control systems with quantized signals
Autorzy:
Zhai, G.
Chen, N.
Gui, W.
Powiązania:
https://bibliotekanauki.pl/articles/331266.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
interconnected systems
decentralized H infinity control
dynamic output feedback
quantizer
quantization
matrix inequality
LMI
sprzężenie zwrotne dynamiczne
kwantyzer
kwantowanie
nierówność macierzowa
metoda LMI
Opis:
In this paper, we consider the design of interconnected H infinity feedback control systems with quantized signals. We assume that a decentralized dynamic output feedback has been designed for an interconnected continuous-time LTI system so that the closed-loop system is stable and a desired H infinity disturbance attenuation level is achieved, and that the subsystem measurement outputs are quantized before they are passed to the local controllers. We propose a local-output-dependent strategy for updating the parameters of the quantizers, so that the overall closed-loop system is asymptotically stable and achieves the same H infinity disturbance attenuation level. Both the pre-designed controllers and the parameters of the quantizers are constructed in a decentralized manner, depending on local measurement outputs.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2013, 23, 2; 317-325
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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