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Wyświetlanie 1-15 z 24
Tytuł:
Analysis and synthesis of converter control system of autonomous induction generator with field oriented control
Autorzy:
Jakubowski, B.
Pieńkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/141329.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
induction generator
converter control
field oriented control
synthesis of control system
Opis:
The paper presents the mathematical model of an autonomous induction generator with the AC load circuit and the converter control system of the voltage magnitude at the terminals of stator generator. The control algorithm and the structure of the control system are described. The simulation results of the control system are presented and discussed.
Źródło:
Archives of Electrical Engineering; 2013, 62, 2; 267-279
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust control and modal analysis of flexible rotor magnetic bearings system
Autorzy:
Mystkowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/229827.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
active magnetic bearings (AMB)
uncertainty design
flexible rotor model
bending modes
synthesis control
rotor vibrations control
Źródło:
Archives of Control Sciences; 2010, 20, 2; 151-163
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Innovative Adaptive Control of Material Fatigue Test Machines Using an MCS Controller
Autorzy:
Heyduk, A.
Kalinowski, K.
Kaula, R.
Pielot, J.
Powiązania:
https://bibliotekanauki.pl/articles/2064948.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
fatigue test machines
stress
non-linear control
adaptive control
Minimal Control Synthesis
Opis:
The paper presents some issues related to the control of fatigue test machines based on W(t) parameter taking into account the simultaneous interaction of stress and strain. This parameter is defined as a product of these values. Such a research method represents a new approach in fatigue testing with an innovative control system. Because of the W(t) function characteristics, the system presents nonlinear behavior and there is a significant deterioration of the control quality and the controlled signal significantly differs from the reference signal waveform. This problem can be solved by introducing a nonlinear block into the feedback loop. Fatigue tests have been carried out for sinusoidal and randomized reference signal waveforms. These tests have proved that the controlled signal follows reference values with an appropriate control quality.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 287--294
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unscented and extended Kalman filters study for sensorless control of PM synchronous motors with load torque estimation
Autorzy:
Zawirski, K.
Janiszewski, D.
Muszynski, R.
Powiązania:
https://bibliotekanauki.pl/articles/200273.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Kalman filters
control system synthesis
machine vector control
sensorless drives
velocity control
permanent magnet synchronous motor
Opis:
This paper describes a study and the experimental verification of sensorless control of permanent magnet synchronous motors using Kalman filters. There are proposed two structures, extended and unscented Kalman filters, which use only the measurement of the motor current for on-line estimation of speed, rotor position and load torque reconstruction. The Kalman filter is an optimal state estimator and is usually applied to a dynamic system that involves a random noise environment. These structures are described in detail, starting with the selection of the variables state vector, the filters structure, and ending with in-depth laboratory tests. It has become possible, without using position and torque sensors, to apply these control structures as a cost-effective solution. Experimental results confirm the validity of the proposed estimation techniques.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 793-801
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Discrete-time Predictive Control with Overparameterized Delay-plant Models and an Identified Cancellation Order
Autorzy:
Kowalczuk, Z.
Suchomski, P.
Powiązania:
https://bibliotekanauki.pl/articles/908488.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
projektowanie systemów
adaptacyjny układ sterowania
sterowanie predykcyjne
sterowanie odporne
delay plants
overparameterization
system design
predictive control
robust control synthesis
adaptive control
Opis:
The paper presents several solutions to the discrete-time generalized predictive (GPC) controller problem, including an anticipative filtration mechanism, which are suitable for plants with nonzero transportation delays. Necessary modifications of the GPC design procedure required for controlling plants based on their non-minimal models are discussed in detail. Although inevitably invoking the troublesome pole-zero cancellation problem, such models can be used in adaptive systems as a remedy for the uncertainty or variability of the model order. The purpose of this paper is to present a complete GPC controller design for delay plants that is robust to the overparameterization of the plant model. Refined conditions for the existence and stability of GPC control solutions in terms of pertinent design parameters are given, and explicit forms of closed-loop characteristic polynomials are provided. The issue of identifying the model cancellation order is also considered, and practical solutions are proposed. The presented ideas are illustrated numerically.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2005, 15, 1; 5-34
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Digital approach to thermionic emission current to voltage conversion for high-voltage sources of electrons
Cyfrowe podejście do metody konwersji natężenia prądu termoemisji elektronowej na napięcie dla wysokonapięciowych źródeł elektronów
Autorzy:
Kania, Bartosz
Powiązania:
https://bibliotekanauki.pl/articles/2174741.pdf
Data publikacji:
2022
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
electron emission
electron source
control system synthesis
digital control
emisja elektronów
źródło elektronów
synteza systemu sterowania
sterowanie cyfrowe
Opis:
The thermionic emission current is used in many vacuum devices such as evaporators, rare gas excimers, or electron beam objects for highenergy physics. The stability of the thermionic emission current is a very important requirement for the accuracy of those devices. Hence, there is a number of control systems that use a feedback signal directly proportional to the emission current in order to stabilize the thermionic emission current. Most of them use feedback from a high-voltage anode circuit to a low-voltage cathode circuit. However, there is a novel solution that uses linear cathode current distribution and processing of two cathode circuit voltage signals for converting the emission current to voltage. However, it is based on old-fashioned analog technology. This paper shows the thermionic emission current to voltage conversion method with the use of a digital control system. A digital realization of a multiplicative-additive algorithm is presented and proper work in closed-loop mode is confirmed.
Prąd termoemisji elektronowej jest wykorzystywany w wielu przyrządach próżniowych takich jak ewaporatory, ekscymery gazów rzadkich czy w fizyce wysokich energii. Stabilność natężenia prądu termoemisji elektronowej jest ważnym wymaganiem w kontekście dokładności tych przyrządów. Istnieje wiele układów regulacji natężenia prądu termoemisji elektronowej, które używają sygnału sprzężenia zwrotnego wprost proporcjonalnego do natężenia prądu termoemisji elektronowej w celu jego stabilizacji. Większość z nich wykorzystuje sprzężenie od wysokonapięciowego obwodu anody do niskonapięciowego obwodu katody. Istnieje nowe rozwiązanie, które wykorzystuje liniowy rozkład prądu katody oraz przetwarzanie dwóch sygnałów z obwodu katody w celu konwersji natężenia prądu termoemisji na napięcie. Niestety metoda ta bazuje na przestarzałej technologii analogowej. W niniejszej pracy pokazana została konwersja natężenia prądu termoemisji elektronowej na napięcie z użyciem cyfrowego układu automatycznej regulacji. Cyfrowa realizacja algorytmu multiplikatywno-addytywnego została zaprezentowana, a poprawna praca w zamkniętej pętli sprzężenia zwrotnego potwierdzona.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2022, 12, 4; 78--81
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of the linear form of dynamical equations of the satellite attitude control system for its analysis and synthesis
Autorzy:
Moldabekov, Meirbek
Sukhenko, Anna
Shapovalova, Darya
Yelubayev, Suleimen
Powiązania:
https://bibliotekanauki.pl/articles/1839688.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
synthesis
stability analysis
attitude control system
satellite
Opis:
At present, the methods based on using linearized dynamical equations are applied for syn- thesis of an attitude control system of a satellite with nonlinear dynamics. Linearized equa- tions describe the satellite dynamics approximately, which is the main their disadvantage. This article shows that basing on the angular momentum theorem, the nonlinear dynamical equations of the satellite attitude control system can be represented in the form of linear differential equations with variable coefficients, which makes it possible to use engineering methods of stability analysis and analysis of transient quality in the process of synthesis of the satellite attitude control system.
Źródło:
Journal of Theoretical and Applied Mechanics; 2021, 59, 1; 109-120
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Towards automated synthesis of concurrent control programs
Autorzy:
Bocewicz, G.
Bzdyra, K.
Banaszak, Z.
Powiązania:
https://bibliotekanauki.pl/articles/117806.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
automated synthesis
automatic modeling
concurrent control programs
Opis:
One of the key problems in the area of automatic synthesis of real-time concurrent control programs is a problem of automated modeling of systems comprising multiple activities or processes that proceed concurrently. In that context, the discrete-event systems framework enabling to predict the modeled objects performance and then to design of assumed quality control program on the basis of the given specification of the processes controlled, plays a crucial role. From that point of view, the Petri nets can be seen as a most widely recognized tool aimed at modeling system’s concurrency. So, the main objective of our contribution is to illustrate the Petri nets based approach from both: IF…THEN… rules system’s behavior specification and its Turing machine like representation points of view.
Źródło:
Applied Computer Science; 2011, 7, 2; 7-20
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rationale for mu-synthesis control of flexible rotor-magnetic bearing systems
Autorzy:
Sawicki, J. T.
Powiązania:
https://bibliotekanauki.pl/articles/387247.pdf
Data publikacji:
2008
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
sterowanie odporne
niepewność pomiaru
robust control
flexible rotor
mu-synthesis
uncertainties
Opis:
The emergence of sophisticated formal control synthesis tools provokes important questions for any prospective user: why learn to use these new tools, what will they offer me? In synthesis of magnetic bearing controllers, it turns out that the range of stabilizing controllers is often quite narrow so that the difference between a poor controller and an “optimal” one may be small. Hence, the product of formal control synthesis tools often looks and performs much like what a reasonably clever control engineer would produce by hand. This paper demonstrates that the real value of these tools lies in a) generation of a performance benchmark which can be used to firmly establish the best performance relative to a specification and b) change of design parameter space to one which is relatively easy to maintain and represents a durable investment from an engineering process view.
Źródło:
Acta Mechanica et Automatica; 2008, 2, 2; 67-74
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust control of the micro UAV dynamics with an autopilot
Autorzy:
Mystkowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/280869.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
robust optimal control
mu-synthesis
uncertainty design
micro aerial vehicle
autopilot
Opis:
This paper presents a nonlinear robust control design procedure for a micro air vehicle, which uses the singular value (μ) and μ-synthesis technique. The optimal robust control law that combines parametric and lumped uncertainties of the micro UAV (unmanned aerial vehicle) which are realized by serial connection of the Kestrel autopilot and the Gumstix microprocessor. Thus, the robust control feedback loops, which handle the uncertainty of aerodynamics derivatives, are used to ensure the robust stability of the UAV local Dynamics in longitudinal and lateral control directions.
Źródło:
Journal of Theoretical and Applied Mechanics; 2013, 51, 3; 751-761
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of synthesis methods in position optimisation and selection of tuned mass damper (TMD) parameters for systems with many degrees of freedom
Autorzy:
Dymarek, Andrzej
Dzitowski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1409049.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
structural control system
vibration
simple fractions
synthesis
rational functions
dynamic characteristics
Opis:
The paper formulates and formalises a method for selecting parameters of the tuned mass damper (TMD) for primary systems with many degrees of freedom. The method presented uses the properties of positive rational functions, in particular their decomposition, into simple fractions and continued fractions, which is used in the mixed method of synthesis of vibrating mechanical systems. In order to formulate a method of tuning a TMD, the paper discusses the basic properties of positive rational functions. The main assumptions of the mixed synthesis method is presented, based on which the general method of determining TMD parameters in the case of systems with many degrees of freedom was formulated. It has been shown that a tuned mass damper suppresses the desired resonance zone regardless of where the excitation force is applied. The advantages of the formulated method include the fact of reducing several forms of the object’s free vibration by attaching an additional system with the number of degrees of freedom corresponding to the number of resonant frequencies reduced. In addition, the tuned mass damper determined in the case of excitation force applied at a single point can be attached to any element of the inertial primary system without affecting the reduction conditions in this way. It results directly from the methodology formalised in the paper. As part of the paper, numerical calculations were performed regarding the tuning of the TMD to the first form of free vibration of a system with 3 degrees of freedom. The parameters determined were subjected to analysis and verification of the correctness of the calculations carried out. For the considered case of a system with 3 degrees of freedom together with a TMD, time responses of displacement, from each floor, were generated to excitation induced by a harmonic force equal to the first form of vibration of the basic system. In addition, in the case of the parameters obtained, the response of the inertial element system to which the TMD was attached to random white noise excitation was determined.
Źródło:
Archives of Control Sciences; 2021, 31, 1; 185-211
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer aided synthesis of reversible logic in traffic control systems
Autorzy:
Pniewski, R.
Powiązania:
https://bibliotekanauki.pl/articles/393838.pdf
Data publikacji:
2018
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
traffic control system
reversible logic
synthesis
system kontroli ruchu
logika rewersyjna
synteza
Opis:
Currently traffic control systems in place relay systems used microprocessor systems. A better solution may be the use of reversible logic in the synthesis of digital control systems. The main problem in the design of reversible logic is the transformation of the description of the system from the form of Boolean equations to the reversible form. The article presents error-proof reversible gates and software supporting the automatic synthesis process. The presented programs were developed and launched by the author of the article. The article presents the algorithms used to describe the description of circuits. The results of the programs’ operation and results of simulation of systems with reversible logic are presented.
Źródło:
Archives of Transport System Telematics; 2018, 11, 3; 43-48
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reconfigurable Antenna Arrays with Phase-only Control in the Presence of Near-field Nulls
Autorzy:
Buttazzoni, G.
Vescovo, R.
Powiązania:
https://bibliotekanauki.pl/articles/308578.pdf
Data publikacji:
2017
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
antenna arrays
near-field nulls
phase-only control
power synthesis
reconfigurability
Opis:
In this paper an effective iterative method is presented for the power synthesis of reconfigurable antenna arrays. The algorithm is suitable for arrays of arbitrary geometry, including the case where a large number of elements is involved. The reconfigurability is achieved by phase-only control, so that the excitation amplitude of each array element remains constant during the reconfiguration process. Such amplitudes may be different from one array element to the others, and they are not assigned a priori, but are optimized. Furthermore, the electric field is imposed to vanish in a number of prescribed points of the near-field region, so that a strong field reduction is obtained in a neighborhood of them.
Źródło:
Journal of Telecommunications and Information Technology; 2017, 3; 88-93
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linear Matrix Inequalities in multivariable ship’s steering
Autorzy:
Rybczak, M.
Powiązania:
https://bibliotekanauki.pl/articles/259077.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
linear matrix inequality
use of LMI
synthesis of regulators
multivariable system
ship's control
Opis:
This paper explains the basics of the Linear Matrix Inequalities (LMI), with examples of simulations and calculations created in Matlab/Simulink programming environment where the controlled plant is the “Blue Lady” ship model. First chapter of this paper gives a short overview of publications describing the use of Linear Matrix Inequalities method. Second chapter contains basic definitions and equations for the LMI method. Chapter three presents the use of LMI method for ship control by describing controller synthesis for the “Blue Lady”. Chapter four compares the operation of two controllers, the first one consisting of three independent proper adjusted PID controllers and the second one being a multivariable LMI controller. Finally conclusions from the above comparison are drawn.
Źródło:
Polish Maritime Research; 2012, S 1; 37-44
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust control of depth of anesthesia based on H∞ design
Autorzy:
Caiado, D. V.
Lemos, J. M.
Costa, B. A.
Powiązania:
https://bibliotekanauki.pl/articles/229439.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
depth of anesthesia
model uncertainty
robust control feedback
H∞ design
μ-synthesis
Opis:
This paper presents a case study on the design of a robust controller for the depth of anesthesia (DoA) induced by the drug propofol. This process is represented by a linear model together with a non-parametric uncertainty description that is evaluated using a patient model bank with 20 patients undergoing sedation. By using H∞ methods, the controller is aimed to comply with robust stability and performance specifications for the class of patient models considered. A minimization problem of sensitivity and complementary sensitivity is made to design the controller. The controller that results from this procedure is approximated by a controller with a lower order, that in turn is redesigned in discrete time for computer control application. The resulting controller is evaluated in simulations using a realistic nonlinear model of DoA.
Źródło:
Archives of Control Sciences; 2013, 23, 1; 41-59
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 24

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