Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "control parameter" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-86 z 86
    Tytuł:
    A novel approach for power system stabilizer control parameter selection: a case-study on two-area four-machine system
    Autorzy:
    Gude, Murali Krishna
    Salma, Umme
    Powiązania:
    https://bibliotekanauki.pl/articles/2086725.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    grey wolf optimizer
    power system stabilizer
    optimization
    stability
    Opis:
    This paper proposes a power system stabilizer (PSS) with optimal controller parameters for damping low-frequency power oscillations in the power system. A novel meta-heuristic, weighted grey wolf optimizer (GWO) has been proposed, it is a variant of the grey wolf optimizer (GWO). The proposed WGWO algorithm has been executed in the selection of controller parameters of a PSS in a multi-area power system. A two-area four- machine test system has been considered for the performance evaluation of an optimally tuned PSS. A multi-objective function based on system eigenvalues has been minimized for obtained optimal controller parameters. The damping characteristics and eigenvalue location in the proposed approach have been compared with the other state-of-the-art- methods, which illustrates the effectiveness of the proposed approach.
    Źródło:
    Archives of Electrical Engineering; 2022, 71, 2; 297--407
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizacja dinamicheskogo rezhima povorota strelovogo krana
    Optimizing the dynamic modes of slewing jib crane
    Autorzy:
    Loveykin, V.
    Melnichenko, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/77156.pdf
    Data publikacji:
    2013
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    jib
    crane
    dynamic model
    braking
    torque moment
    control parameter
    mathematical model
    Opis:
    Применен способ уменьшения колебаний груза на гибком подвесе при работе механизма поворота стрелового крана во время переходных процессов путем оптимизации режимов пуска и торможения приводного механизма по динамическому критерию, представляющего собой среднее зна чение динамической составляющей мощно сти привода за время движения.
    The method of cargo oscillation reduction, during the lifting machines operation, has been considered in the article. The start-up mode of the crane swinging mechanism optimization has been carried out by means of variational calculation. The criterion which is the average value of the dynamic component of the drive power of the move. has been used. And this criterion has been subject to minimization. The torque moment of the driving mechanism, acting towards the crane swinging mechanism, has been selected as a control parameter.
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 3
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of control parameters on synchronization stability of virtual synchronous generator
    Autorzy:
    Zhang, Yanxia
    Cheng, Yachao
    Liu, Kaixiang
    Han, Yue
    Powiązania:
    https://bibliotekanauki.pl/articles/2172794.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    control parameter
    frequency modulation coefficient
    phase plane method
    synchronization stability
    virtual synchronous generator
    Opis:
    Different from the synchronization mechanism of synchronous generators, the non-synchronous generators must be synchronized with the grid through a controller. Generally, the virtual synchronous generator (VSG) control strategy is adopted for this purpose. In view of the current situation, where the control loops are not comprehensively considered in the research of the synchronization stability of the VSG, this paper considers multiple control loops, such as active frequency loops, virtual governors, power filters and current constraint control, to establish the mathematical model of the VSG and infinite system. On this basis, the correlation formula between power angle difference and control parameters is deduced. Adopting the phase plane method, the influence of different control loops and their parameters on the transient synchronization stability is analyzed. Finally, a setting principle of the frequency modulation coefficient of virtual governors is proposed, which not only meets the response speed of control systems, but also has good control performance.
    Źródło:
    Archives of Electrical Engineering; 2022, 71, 4; 811--828
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The method of selection of optimum fitting parameters for stationary photovoltaic systems and optimum control parameters for tracking photovoltaic systems
    Metoda doboru optymalnych parametrow montazu dla stacjonarnych i sterowania dla nadaznych systemow fotowoltaicznych
    Autorzy:
    Sarniak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/792121.pdf
    Data publikacji:
    2012
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    solar radiation
    solar collector
    photovoltaic conversion
    photovoltaic panel
    fitting parameter
    control parameter
    meteorological station
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 1
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research of improved mathematical models at operational tests of diesel locomotives
    Issledovanie primenenija usovershenstvovannykh matematicheskikh modelejj pri provedenii ehkspluatacionnykh ispytanijj teplovodov
    Autorzy:
    Falendysh, A.
    Zinkivskyi, A.
    Bragin, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/792851.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    diesel locomotive
    operational test
    mathematical model
    control parameter
    technical condition
    rolling stock
    test result
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 1
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of X-S Control Cards to Parameter Control in the Machining Process of Piston Castings for Internal Combustion Engines
    Autorzy:
    Krępa, Adam
    Piątkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2126905.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    control cards
    casting quality
    machining of castings
    SPC
    Statistical Process Control
    karty kontrolne
    jakość odlewów
    obróbka odlewów
    statystyczna kontrola procesu
    Opis:
    This article discusses the possibility of using a two-track X-S control card on a Mesas device to control the production process parameters of piston castings for combustion engines. The research was carried out at the Federal-Mogul Gorzyce company. The basis for estimating the variability of the process results from the mean value (X) is the standard deviation (S). Thanks to specially designed measuring stations that use algorithms to calculate process indicators (Cp and/or Cpk) and their visualization, the cost of manufacturing products and the number of non-compliant products (scraps) are reduced. The process stability was investigated by measuring the key dimensions of the piston casting in a specific population and a given measurement cycle. Taking into account the precision of details, their technical condition, and surface quality, the production machines and cutting tools were optimally selected. It has been found that an important element of the effective use of Statistical Process Control (SPC) are trained/experienced operators who can correctly interpret the resulting control chart forms.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 4; 116--120
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive approaches to parameter control in genetic algorithms and genetic programming
    Autorzy:
    Spalek, J.
    Gregor, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/117900.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    adaptive approach
    genetic algorithms
    genetic programming
    Opis:
    The paper concerns the application of Genetic Algorithms and Genetic Programming to complex tasks such as automated design of control systems, where the space of solutions is non-trivial and may contain discontinuities. Several adaptive mechanisms for control of the search algorithm's parameters are proposed, investigated and compared to each other. It is shown that the proposed mechanisms are useful in preventing the search from getting trapped in local extremes of the fitness landscape.
    Źródło:
    Applied Computer Science; 2011, 7, 1; 38-56
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Information Age System For Education In Paradigmal Forecast Discourse
    Autorzy:
    Bekh, Volodymyr P.
    Bekh, Yuliya
    Powiązania:
    https://bibliotekanauki.pl/articles/476201.pdf
    Data publikacji:
    2019
    Wydawca:
    Wyższa Szkoła Ekonomiczno-Humanistyczna w Bielsku-Białej
    Tematy:
    planetary personality
    industrial education
    information education
    spirit of the era
    science
    evaluation
    free education
    theory of education
    cognitive pedagogy
    personalization
    individualization
    control parameter
    Opis:
    The state of origin of the system of education and upbringing of the information age realized in the algorithm of self-organization is predicted on the basis of the regularities of the first stage of the life cycle of the social system of industrial education; the state of the "spirit of the era", which carries the information society, is estimated as an example of a new type of life of the planetary community; worldview, ideological and conceptual prerequisites for forming a new type of education are analyzed; the state of fundamental science is highlighted as a basis for generating a modernization of the content of education in the 21st century; the problems of the theory of education and pedagogy, which are not solved in the perspective of the state educational policy (especially the means of pedagogical influence on the individual, including in the sphere of strategy, tactics and operational management of education) are revealed.
    Źródło:
    MIND Journal; 2019, 8; 1-15
    2451-4454
    Pojawia się w:
    MIND Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust control of distributed parameter mechanical systems using a multidimensional systems approach
    Autorzy:
    Cichy, B.
    Augusta, P.
    Rogers, E.
    Gałkowski, K.
    Hurak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/199947.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    robust control
    distributed parameter mechanical systems
    multidimensional systems
    Opis:
    The unique characteristic of a repetitive processes is a series of sweeps, termed passes, through a set of dynamics defined over a finite duration. On each pass an output, termed the pass profile is produced which acts as on forcing function, and hence contributes to, the dynamics of the next pass profile. This leads to the possibility that the output, i.e. the sequence of pass profiles, will contain oscillations that increase in amplitude in the pass-to-pass direction. Such behavior cannot be controlled by application of standard linear systems control laws and instead they must be treated as two-dimensional (2D) systems where information propagation in two independent directions, termed passto-pass and along the pass respectively, is the defining feature. Physical examples of such processes include long-wall coal cutting and metal rolling. In this paper, stability analysis and control law design algorithms are developed for discrete linear repetitive processes where a plane, or rectangle, of information is propagated in the pass-to-pass direction. The possible use of such a model in the control of distributed parameter systems has been investigated in previous work and this paper considers an extension to allow for uncertainty in the model description.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 1; 67-75
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal digital control of an uncertain parameter 2nd order plant
    Autorzy:
    Oprzędkiewicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/93136.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowa Wyższa Szkoła Zawodowa w Tarnowie
    Tematy:
    digital control
    optimal control
    uncertain parameter systems
    sterowanie cyfrowe
    optymalna kontrola
    system parametrów niepewnych
    Opis:
    In the paper a construction of a control system for 2nd order, uncertain-parameter plant is discussed. The considered model of the plant is described by state space equation or by equivalent transfer function and it describes a huge class of real control plants, for example – electric drives or oriented PV systems. As a controller the digital proportional (P) controller was employed. The control system is going to be implemented at the microcontroller platform. Results are by the example depicted.
    Źródło:
    Science, Technology and Innovation; 2018, 2, 1; 59-63
    2544-9125
    Pojawia się w:
    Science, Technology and Innovation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sterowanie optymalne systemami o parametrach rozłożonych z opóźnieniami
    Optimal Control of Distributed Parameter Systems with Delays
    Autorzy:
    Kowalewski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/274661.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    sterowanie optymalne
    warunki optymalności
    istnienie i jednoznaczność
    opóźnienia czasowe
    optimal control
    optimality conditions
    existence and uniqueness of solutions
    time delays
    Opis:
    W artykule dokonano przeglądu problematyki sterowania optymalnego systemami o parametrach rozłożonych z opóźnieniami w warunkach brzegowych. Zaprezentowano podstawowe zagadnienia dotyczące systemów o parametrach rozłożonych takie jak: istnienie i jednoznaczność rozwiązań, sterowanie optymalne rozłożone i brzegowe, sterowanie optymalne ze sprzężeniem zwrotnym, sterowanie czasowo-optymalne, sterowalność oraz modele matematyczne systemów o parametrach rozłożonych.
    In this article the review of optimal control problems for distributed parameter systems with boundary conditions involving time delays is performed. The principal problems, namely: existence and uniqueness of solutions, distributed and boundary optimal control, optimal feedback control, controllability and mathematical models of distributed parameter systems are presented.
    Źródło:
    Pomiary Automatyka Robotyka; 2011, 15, 12; 57-59
    1427-9126
    Pojawia się w:
    Pomiary Automatyka Robotyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Earplug Actuator Selection for a Miniature Personal Active Hearing Protection System
    Autorzy:
    Pawełczyk, M.
    Latos, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/178052.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    active noise control
    fixed-parameter control
    high-level noise
    nonstationary noise
    feedforward control
    earplug
    hearing protection
    Opis:
    There are many industrial environments which are exposed to a high-level noise. It is necessary to protect people from the noise. Most of the time, the consumer requires a miniature version of a noise canceller to satisfy the internal working place requirements. Very important thing is to select the most appropriate personal hearing protection device, for example an earplug. It should guarantee high passive noise attenuation and allow for secondary sound generation in case of active control. In many cases the noise is nonstationary. For instance, some of the noisy devices are switched on and off, speed of some rotors or fans changes, etc. To avoid any severe transient acoustic effects due to potential convergence problems of adaptive systems, a fixed-parameter approach to control is appreciated. If the noise were stationary, it would be possible to design an optimal control filter minimising variance of the signal being the effect of the acoustic noise and the secondary sound interference. Because of noise nonstationarity for most applications, the idea of generalised disturbance defined by a frequency window of different types has been developed by the authors and announced in previous publications. The aim of this paper is to apply such an approach to different earplugs and verify its noise reduction properties. Simulation experiments are conducted based on real world measurements performed using the G.R.A.S. artificial head equipped with an artificial mechanical ear, and the noise recorded in a power plant.
    Źródło:
    Archives of Acoustics; 2010, 35, 2; 213-222
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The method of estimating kinematic road excitation with use of real suspension responses and model
    Autorzy:
    Klockiewicz, Zbyszko
    Ślaski, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/127825.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    suspension
    kinematic excitation
    remote parameter control
    simulation
    PID controller
    zawieszenie
    wymuszenie kinematyczne
    zdalna kontrola parametrów
    symulacja
    regulator PID
    Opis:
    The paper deals with the problem of vertical kinematic excitations in road vehicle dynamics simulation, with the main focus on reconstruction of random excitations using measured dynamic responses of a car suspension. The possibility of causing excitations adequately in terms of chosen conditions of exploitation and in reliable way is crucial to properly asses ride comfort, ride safety as well as rattle space and fatigue strength of suspension elements. The paper presents a method of generating equivalent kinematic excitation allowing for reconstruction of suspension dynamic responses in simulation. The method uses unsprung mass accelerations acquired during test rides and a model of vertical suspension dynamics. The method uses estimated displacements of unsprung mass as a preliminary approximation of kinematic excitation and tracking control system with a PID controller, which causes corrections of kinematic excitations transforming it to the form that allows for faithful reconstruction of unsprung mass accelerations and, in turn, kinematic excitations. The paper presents the basic structure of kinematic excitations’ reconstruction system as well as a method of tuning PID controller’s coefficients so that the error in estimation is minimized. Research and verification of results were done using a sine chirp signal and constant frequency sine waves. The similarity of estimated road profiles is high with error no larger than 8% of the original signal’s amplitude.
    Źródło:
    Vibrations in Physical Systems; 2019, 30, 2; 1-10
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Self-adaptation of parameters in a learning classifier system ensemble machine
    Autorzy:
    Troć, M.
    Unold, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/907767.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    komputerowe uczenie się
    system klasyfikujący
    sterowanie adaptacyjne
    sterowanie parametryczne
    machine learning
    extended classifier system
    self-adaptation
    adaptive parameter control
    Opis:
    Self-adaptation is a key feature of evolutionary algorithms (EAs). Although EAs have been used successfully to solve a wide variety of problems, the performance of this technique depends heavily on the selection of the EA parameters. Moreover, the process of setting such parameters is considered a time-consuming task. Several research works have tried to deal with this problem; however, the construction of algorithms letting the parameters adapt themselves to the problem is a critical and open problem of EAs. This work proposes a novel ensemble machine learning method that is able to learn rules, solve problems in a parallel way and adapt parameters used by its components. A self-adaptive ensemble machine consists of simultaneously working extended classifier systems (XCSs). The proposed ensemble machine may be treated as a meta classifier system. A new self-adaptive XCS-based ensemble machine was compared with two other XCS-based ensembles in relation to one-step binary problems: Multiplexer, One Counts, Hidden Parity, and randomly generated Boolean functions, in a noisy version as well. Results of the experiments have shown the ability of the model to adapt the mutation rate and the tournament size. The results are analyzed in detail.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2010, 20, 1; 157-174
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie metody głównych składowych w kartach kontrolnych procesów wieloparametrowych
    Application of Principal Components Method in Control Charts of Multi-Parameter Processes
    Autorzy:
    Volodarsky, Evgeniy T.
    Kozyr, Oleh
    Warsza, Zygmunt Lech
    Powiązania:
    https://bibliotekanauki.pl/articles/27312458.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    kontrola wieloparametrowego procesu technologicznego
    karty kontrolne Shewharta
    metoda głównych składowych
    Shewhart control charts
    principal components method
    control of a multi-parametric technological process
    Opis:
    W artykule opisano metodę głównych składowych PC (ang. Principal Components) służącą do tworzenia kart kontrolnych dla wieloparametrowych procesów wytwórczych o skorelowanych parametrach. Ocenę skuteczności zastosowania tej metody przeprowadzono na symulowanych danych, zbliżonych do wyników pomiarów uzyskanych w sterowaniu rzeczywistym procesem technologicznym. W wyniku modelowania kontroli procesu n-parametrowego otrzymano potwierdzenie skuteczności tej metody. Praca ta kontynuuje cykl publikacji autorów o kartach stosowanych w metodach kontroli jakości produkcji.
    The article describes in detail the method of constructing control charts based on principal components. Evaluation of the effectiveness of the application of the method is carried out on simulated data, which are close to the measurement results obtained during the control of a real technological process. The results show that the proposed method is effective for controlling a multi-parameter technological process in the presence of a correlated parameters.
    Źródło:
    Pomiary Automatyka Robotyka; 2023, 27, 3; 65--71
    1427-9126
    Pojawia się w:
    Pomiary Automatyka Robotyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finite-dimensional H∞ control of a parallel-flow heat exchange process
    Autorzy:
    Sano, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/200376.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    distributed parameter system H∞ control
    residual mode filter
    semigroup
    parametr kontroli systemu H∞
    półgrupa
    RMF
    Opis:
    This paper is concerned with the H∞ control problem of a coupled transport-diffusion system with Neumann boundary condition, related to parallel-flow heat exchange process. It is shown that, by using the previous approach for a single diffusion system, the H∞ control problem can be solved by constructing a residual mode filter (RMF)-based controller which is of finite-dimension. A numerical simulation result is given to demonstrate the validity of the proposed method.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 1; 11-19
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of strategy adaptation on differential evolution in presence and absence of parameter adaptation: an investigation
    Autorzy:
    Dawar, D.
    Ludwig, S. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/91882.pdf
    Data publikacji:
    2018
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    evolutionary algorithms
    differential evolution
    mutation strategy
    adaptive control
    Opis:
    Differential Evolution (DE) is a simple, yet highly competitive real parameter optimizer in the family of evolutionary algorithms. A significant contribution of its robust performance is attributed to its control parameters, and mutation strategy employed, proper settings of which, generally lead to good solutions. Finding the best parameters for a given problem through the trial and error method is time consuming, and sometimes impractical. This calls for the development of adaptive parameter control mechanisms. In this work, we investigate the impact and efficacy of adapting mutation strategies with or without adapting the control parameters, and report the plausibility of this scheme. Backed with empirical evidence from this and previous works, we first build a case for strategy adaptation in the presence as well as in the absence of parameter adaptation. Afterwards, we propose a new mutation strategy, and an adaptive variant SA-SHADE which is based on a recently proposed self-adaptive memory based variant of Differential evolution, SHADE. We report the performance of SA-SHADE on 28 benchmark functions of varying complexity, and compare it with the classic DE algorithm (DE/Rand/1/bin), and other state-of-the-art adaptive DE variants including CoDE, EPSDE, JADE, and SHADE itself. Our results show that adaptation of mutation strategy improves the performance of DE in both presence, and absence of control parameter adaptation, and should thus be employed frequently.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2018, 8, 3; 211-235
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal control of nonlinear evolution equations
    Autorzy:
    Papageorgiou, Nikolaos
    Yannakakis, Nikolaos
    Powiązania:
    https://bibliotekanauki.pl/articles/729352.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    evolution triple
    compact embedding
    monotone operator
    pseudomonotone operator
    L-generalized pseudomonotonicity
    integration by parts
    evolution inclusion
    saddle point
    necessary conditions
    adjoint equation
    distributed parameter systems
    Opis:
    In this paper, first we consider parametric control systems driven by nonlinear evolution equations defined on an evolution triple of spaces. The parametres are time-varying probability measures (Young measures) defined on a compact metric space. The appropriate optimization problem is a minimax control problem, in which the system analyst minimizes the maximum cost (risk). Under general hypotheses on the data we establish the existence of optimal controls.
    Then we pass to nonparametric systems, which are governed by nonlinear evolution equations with nonmonotone operators. We prove two existence results for such evolution inclusions, which are of independent interest and extend significantly the results existing in the literature. Then we solve time-optimal and Meyer-type optimization problems. In Section 5, we derive necessary conditions for saddle point optimality in the minimax control problem. We conclude the paper with three examples of distributed parameter control systems.
    Źródło:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2001, 21, 1; 5-50
    1509-9407
    Pojawia się w:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stan badań w zakresie teorii sterowania
    State of research in control theory
    Autorzy:
    Klamka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/153744.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    układy dynamiczne
    układy liniowe
    układy z opóźnieniami
    układy o parametrach rozłożonych
    układy nieliniowe
    dynamical systems
    linear systems
    delayed systems
    distributed parameter systems
    nonlinear systems
    Opis:
    Niniejsze opracowanie poświęcone jest analizie aktualnego stanu badań oraz perspektywom rozwoju teorii sterowania w uczelniach i instytutach naukowych. Celem opracowania jest podjecie próby wytyczenia głównych kierunków działalności naukowo-badawczej oraz ich koordynacja. Teoria sterowania jest uprawiana w kilkunastu ośrodkach krajowych, w większości w wyższych uczelniach technicznych oraz w instytutach badawczych Polskiej Akademii Nauk. W artykule rozpatrywane są zarówno skończenie wymiarowe układy dynamiczne liniowe ciągłe i dyskretne jak i nieliniowe układy dynamiczne. W przypadku układów liniowych wyróżnia się miedzy innymi układy osobliwe oraz w przypadku układów dyskretnych układy o wielu zmiennych niezależnych. Przedstawione są także układy nieskończenie-wymiarowe opisane równaniami różniczkowymi cząstkowymi oraz skończenie wymiarowe układy dynamiczne z różnego typu opóźnieniami zarówno w stanie, jak i w sterowaniu.
    The presented paper is devoted to analysis of research in the domain of control theory and development perspectives of control theory in technical high schools and research institutes of the Polish Academy of Sciences. The main research directions in mathematical control theory are pointed out. It should be stressed that control theory is developed in several universities and institutes. The paper contains many remarks and comments concerning control theory of finite-dimensional dynamical systems both for linear continuous-time and discrete-time as well as nonlinear dynamical systems. In the case of linear systems there are distinguished, among others, singular systems and in the case of discrete-time systems - systems with many independent variables. Moreover, infinite-dimensional dynamical systems and systems with different types of delays in the state variables and in the admissible controls are also considered. There are also presented in the paper: linear finite-dimensional dynamical systems, multidimensional systems and automatic control, distributed parameter dynamical systems, shape optimisation, dynamical systems with delays, special flying machines, nonlinear dynamical systems, multi-criterion optimisation.
    Źródło:
    Pomiary Automatyka Kontrola; 2011, R. 57, nr 11, 11; 1436-1440
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fault-tolerant control strategy for actuator faults using LPV techniques: application to a two degree of freedom helicopter
    Autorzy:
    Montes de Oca, S.
    Puig, V.
    Witczak, M.
    Dziekan, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/331468.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sterowanie tolerujące uszkodzenia
    układ liniowy niestacjonarny
    liniowa nierówność macierzowa
    fault tolerant control
    linear parameter varying
    virtual actuator
    linear matrix inequality
    Opis:
    In this paper, a Fault Tolerant Control (FTC) strategy for Linear Parameter Varying (LPV) systems that can be used in the case of actuator faults is proposed. The idea of this FTC method is to adapt the faulty plant instead of adapting the controller to the faulty plant. This approach can be seen as a kind of virtual actuator. An integrated FTC design procedure for the fault identification and fault-tolerant control schemes using LPV techniques is provided as well. Fault identification is based on the use of an Unknown Input Observer (UIO). The FTC controller is implemented as a state feedback controller and designed using polytopic LPV techniques and Linear Matrix Inequality (LMI) regions in such a way as to guarantee the closed-loop behavior in terms of several LMI constraints. To assess the performance of the proposed approach, a two degree of freedom helicopter is used.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2012, 22, 1; 161-171
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thin inclusion in elastic body: identification of damage parameter
    Autorzy:
    Khludnev, Alexander
    Powiązania:
    https://bibliotekanauki.pl/articles/970124.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    thin inclusion
    defect
    damage parameter
    non-penetration boundary conditions
    optimal control
    Opis:
    In the paper, we consider an equilibrium problem for a 2D elastic body with a thin elastic inclusion crossing an external boundary. The elastic body has a defect which is characterized by a positive damage parameter. The presence of a defect means that the problem is formulated in a non-smooth domain. Non-linear boundary conditions at the defect faces are imposed to prevent the mutual penetration between the faces. Both variational and differential problem formulations are proposed, and existence of solutions is established. We study an asymptotics of solutions with respect to the damage parameter as well as with respect to a rigidity parameter of the inclusion. Identification problems for finding the damage parameter are investigated. To this end, existence of solutions of optimal control problems is proven.
    Źródło:
    Control and Cybernetics; 2019, 48, 1; 13-29
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    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:
    Pole assignment by feedback control of the second order coupled singular distributed parameter systems
    Autorzy:
    Ge, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/970460.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    sterowanie ze sprzężeniem zwrotnym
    feedback control
    pole assignment
    coupled singular distributed parameter systems
    generalized inverse one of operator
    Opis:
    Pole assignment by feedback control of the second order coupled singular distributed parameter systems is discussed via functional analysis and operator theory in Hilbert space. The solutions of the problem and the constructive expression of the solutions are given by the generalized inverse one of bounded linear operator. This research is theoretically important for studying the stabilization and asymptotical stability of tlie second order coupled singular distributed parameter systems.
    Źródło:
    Control and Cybernetics; 2004, 33, 4; 551-562
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of matrix parameters in elliptic PDEs
    Autorzy:
    Deckelnick, K.
    Hinze, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/206153.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    parameter identification
    elliptic optimal control problem
    control constraints
    H-convergence
    variational discretization
    Opis:
    In the present work we treat the inverse problem of identifying the matrix-valued diffusion coefficient of an elliptic PDE from multiple interior measurements with the help of techniques from PDE constrained optimization. We prove existence of solutions using the concept of H-convergence and employ variational discretization for the discrete approximation of solutions. Using a discrete version of H-convergence we are able to establish the strong convergence of the discrete solutions. Finally we present some numerical results.
    Źródło:
    Control and Cybernetics; 2011, 40, 4; 957-969
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust predictive control of an overhead crane
    Autorzy:
    Smoczek, J.
    Szpytko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/243833.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    overhead crane
    predictive control
    linear parameter varying model
    recursive estimation
    fuzzy interpolation
    Opis:
    The predictive control scheme is developed for an overhead crane using the generalized predictive procedure applied for the discrete time linear parameter-varying model of a crane dynamic. The robust control technique is developed with respect to the constraints of sway angle of a payload and control input signal. The two predictive strategies are presented and compared experimentally. In the first predictive control scheme, the online estimation of the parameters of a crane dynamic model is performed using the recursive least square algorithm. The second approach is a sensorless anti-sway control strategy. The sway angle feedback signal is estimated by a linear parameter-varying model of an unactuated pendulum system with the parameters interpolated using a quasi-linear fuzzy model designed through utilizing the P1-TS fuzzy theory. The fuzzy interpolator is applied to approximate the parameters of a crane discrete-time dynamic model within the range of scheduling variables changes: the rope length and mass of a payload. The experiments carried out on a laboratory scaled overhead crane confirmed effectiveness and feasibility of the proposed solutions. The implementation of control systems was performed using the PAC system with RX3i controller. The series of experiments carried out for different operating points proved robustness of the control approaches presented in the article.
    Źródło:
    Journal of KONES; 2017, 24, 2; 231-238
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The gradient projection method for solving an optimal control problem
    Autorzy:
    Farag, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1339270.pdf
    Data publikacji:
    1997
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    distributed parameter systems
    boundary value problems
    gradient methods
    optimal control
    Opis:
    A gradient method for solving an optimal control problem described by a parabolic equation is considered. The gradient projection method is applied to solve the problem. The convergence of the projection algorithm is investigated.
    Źródło:
    Applicationes Mathematicae; 1996-1997, 24, 2; 141-147
    1233-7234
    Pojawia się w:
    Applicationes Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust fuzzy model predictive control of an overhead crane
    Autorzy:
    Smoczek, J.
    Szpytko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/242944.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    overhead crane
    model predictive control
    linear parameter varying model
    fuzzy interpolation
    Opis:
    The method of controlling an overhead crane with respect to the variation of operating conditions and control constraints is developed using a model predictive control (MPC) and fuzzy interpolation applied in linear parameter varying (LPV) approach to crane dynamic modelling. The proposed control approach is based on the assumption that operating conditions vary within the known range of scheduling variables, and the parameters of a crane dynamic model can be interpolated by a quasi-linear fuzzy model designed through utilizing the P1-TS fuzzy theory. Hence, a crane dynamic is approximated through interpolation between a set of local linear models determined through identification experiments at the local operating points selected within the bounded intervals of scheduling variables. For the modelling assumptions, the control algorithm is developed based on a generalized predictive control (GPC) procedure taking into consideration the constraints on sway angle of a payload and control signal. Feasibility and applicability of the proposed control technique were confirmed during experiments carried out on a laboratory-scaled overhead crane. The results of experiments are presented and compared with performances of a fuzzy logic-based scheduling control scheme.
    Źródło:
    Journal of KONES; 2015, 22, 2; 205-212
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection and Control Problems for Non-Linear Distributed-Parameter Systems With Delays
    Autorzy:
    Namir, A.
    Lahmidi, F.
    Labriji, E. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/911203.pdf
    Data publikacji:
    2000
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    system z rozproszonymi parametrami
    detekcja
    sterowanie
    distributed-parameter systems
    non-linear discrete-time systems
    detection
    control
    fixed-point theorems
    Opis:
    First, we consider non-linear discrete-time and continuous-time systems with unknown inputs. The problem of reconstructing an input using the information given by an output equation is investigated. Then we examine a control problem for non-linear discrete-time hereditary systems, i.e. the problem of finding a control which drives the state of the system from its initial value to a given desired final state. The methods used to solve these problems are based on the state-space technique and fixed-point theorems. To illustrate the outlined ideas, various numerical simulation results are presented.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2000, 10, 3; 437-464
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust output predictive sequential controller design
    Autorzy:
    Vesely, V.
    Rosinova, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/229887.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    model predictive control
    robust control
    parameter dependent quadratic stability
    Lyapunov function
    polytopic system
    sequential approach
    Opis:
    The paper addresses design problem of a robust parameter dependent quadratically stabilizing output/state feedback model predictive control for linear polytopic systems without constraints using original equential approach. The design procedure ensures stability, robustness properties and guaranteed cost for the closed-loop uncertain system
    Źródło:
    Archives of Control Sciences; 2010, 20, 1; 31-46
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An algorithm for Bayes parameter identification with quadratic asymmetrical loss function
    Autorzy:
    Kulczycki, P.
    Mazgaj, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/970992.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    sterowanie optymalne
    parameter identification
    Bayes decision
    quadratic asymmetrical loss function
    kernel estimators
    optimal control
    Opis:
    The paper deals with the estimation problem of model parameter values, in tasks where overestimation implies results other than underestimation, and wliere losses arising from this can be described by a quadratic function with different coefficients characterizing positive and negative errors. In the approach presented, the Bayes decision rule was used, allowing for minimizing potential losses. Calculation algorithms were based on the theory of statistical kernel estimators, which frees the method from distribution type. The result constitutes a complete numerical procedure enabling effective calculation of the value of an identified parameter or - in the multidimensional case - the vector of parameters. The method is aimed at both of the main contemporary approaches to uncertainty modeling: probabilistic and fuzzy logic. It is universal in nature and can be applied in a wide range of tasks of engineering, economy, sociology, biomedicine and other related fields.
    Źródło:
    Control and Cybernetics; 2005, 34, 4; 1127-1148
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two-Dimensional Automatic Control Modeling of a Posture Control System
    Autorzy:
    Park, K. S.
    Kim, U. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/90283.pdf
    Data publikacji:
    1998
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    posture control model
    posturography
    perturbation
    parameter identification
    model fitness
    stability
    predictability
    model kontroli
    postura
    posturografia
    identyfikacja parametrów
    fitness
    Opis:
    A posture control model has been developed on the basis of the 2-dimensional feedback control theory. Human postural characteristics were investigated in 5 healthy participants. Tests were performed with eyes open and eyes closed. After 5 s of quiet standing, each participant was unexpectedly pulled forward by 30 mm at his pelvis height and then released. Postural sway was measured over 20 s at a rate of 100 per second. Transfer functions to represent the posture control characteristic were identified by the least squares' method. These showed good results of the model's fitness, predictability, and stability. The response of the eyes-closed condition to perturbation is more oscillatory than that of the eyes-open condition. It seems that the model identified could be applicable to ergonomics, sports, or clinical situations.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 1998, 4, 4; 485-498
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model predictive control of four-leg three-level flying capacitor converter: influence of model parameter mismatch
    Autorzy:
    Antoniewicz, K.
    Rafał, K.
    Jasiński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193479.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    multilevel converter
    current control
    model predictive control
    MPC
    shunt active power filter
    SAPF
    Opis:
    This paper presents a control method for a four-leg three-level flying capacitor converter (FCC) operating as a shunt active power filter (SAPF), based on model predictive control with finite number of control states (FS-MPC). Current control and capacitor voltage balancing are described. Influence of the mismatch of the inductive filter model parameters on the current control precision is analysed. Results are supported by the experimental waveforms obtained with a 10kVA set-up.
    Źródło:
    Power Electronics and Drives; 2018, 3, 38; 1-9
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bayesian parameter estimation and adaptive control of Markov processes with time-averaged cost
    Autorzy:
    Borkar, V.
    Associate, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1339007.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    time-averaged cost
    adaptive control
    asymptotic optimality
    cost-biased estimate
    Bayesian estimation
    Opis:
    This paper considers Bayesian parameter estimation and an associated adaptive control scheme for controlled Markov chains and diffusions with time-averaged cost. Asymptotic behaviour of the posterior law of the parameter given the observed trajectory is analyzed. This analysis suggests a "cost-biased" estimation scheme and associated self-tuning adaptive control. This is shown to be asymptotically optimal in the almost sure sense.
    Źródło:
    Applicationes Mathematicae; 1998-1999, 25, 3; 339-358
    1233-7234
    Pojawia się w:
    Applicationes Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Supervisory fault tolerant control of the GTM UAV using LPV methods
    Autorzy:
    Péni, T.
    Vanek, B.
    Szabó, Z.
    Bokor, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/330070.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fault tolerant control
    linear parameter varying systems
    supervisory architecture
    flight control
    sterowanie tolerujące uszkodzenia
    układ liniowy niestacjonarny
    sterowanie lotem
    Opis:
    A multi-level reconfiguration framework is proposed for fault tolerant control of over-actuated aerial vehicles, where the levels indicate how much authority is given to the reconfiguration task. On the lowest, first level the fault is accommodated by modifying only the actuator/sensor configuration, so the fault remains hidden from the baseline controller. A dynamic reallocation scheme is applied on this level. The allocation mechanism exploits the actuator/sensor redundancy available on the aircraft. When the fault cannot be managed at the actuator/sensor level, the reconfiguration process has access to the baseline controller. Based on the LPV control framework, this is done by introducing fault-specific scheduling parameters. The baseline controller is designed to provide an acceptable performance level along all fault scenarios coded in these scheduling variables. The decision on which reconfiguration level has to be initiated in response to a fault is determined by a supervisor unit. The method is demonstrated on a full six-degrees-of-freedom nonlinear simulation model of the GTM UAV.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 117-131
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust Predictive Control Using a Time-Varying Youla Parameter
    Autorzy:
    Van den Boom, T. J. J.
    De Vries, R. A. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/908311.pdf
    Data publikacji:
    1999
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sterowanie predykcyjne
    stabilność
    niezawodność
    predictive control
    Youla parametrization
    stability
    robustness
    Opis:
    In this paper, a standard predictive control problem (SPCP) is formulated, which consists of one extended process description with a feedback uncertainty block. The most important finite horizon predictive control problems can be seen as special realizations of this SPCP. The SPCP and its solution are given in a state-space form. The objective of the controller is a nominal performance subject to signal constraints and robust stability with respect to a 1-norm bounded model uncertainty. The optimal controller consists of a feedforward part for nominal signal tracking and a feedback part for disturbance rejection and model error compensation. The feedforward part is realized by the predictive controller for the nominal disturbance-free case. The feedback part of the controller is realized by using the Youla parametrization. The Youla parameter is optimized at every sample time in a receding horizon setting to cope with signal constraints and (robust stability) constraints on the operator itself.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 1999, 9, 1; 101-128
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Statistical analysis and modeling of SIP traffic for parameter estimation of server hysteretic overload control
    Autorzy:
    Abaev, P.
    Razumchik, R.
    Uglov, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/308261.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    Markov Modulated Poisson Process
    overload control
    SIP server
    statistical analysis
    Opis:
    The problem of overload control in Session Initiation Protocol (SIP) signaling networks gives rise to many questions which attract researchers from theoretical and practical point of view. Any mechanism that is claimed to settle this problem down demands estimation of local (control) parameters on which its performance is greatly dependent. In hysteretic mechanism these parameters are those which define hysteretic loops. In order to find appropriate values for parameters one needs adequate model of SIP traffic flow circulating in the network under consideration. In this paper the attempt is made to address this issue. Analysis of SIP traffic collected from telecommunication operator’s network is presented. Traffic profile is built. It is shown that fitting with Markov Modulated Poisson Process with more than 2 phases is accurate. Estimated values of its parameters are given.
    Źródło:
    Journal of Telecommunications and Information Technology; 2013, 4; 22-31
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adapting differential evolution algorithms for continuous optimization via greedy adjustment of control parameters
    Autorzy:
    Leon, M.
    Xiong, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/91824.pdf
    Data publikacji:
    2016
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    differential evolution
    optimization
    parameter adaptation
    Opis:
    Differential evolution (DE) presents a class of evolutionary and meta-heuristic techniques that have been applied successfully to solve many real-world problems. However, the performance of DE is significantly influenced by its control parameters such as scaling factor and crossover probability. This paper proposes a new adaptive DE algorithm by greedy adjustment of the control parameters during the running of DE. The basic idea is to perform greedy search for better parameter assignments in successive learning periods in the whole evolutionary process. Within each learning period, the current parameter assignment and its neighboring assignments are tested (used) in a number of times to acquire a reliable assessment of their suitability in the stochastic environment with DE operations. Subsequently the current assignment is updated with the best candidate identified from the neighborhood and the search then moves on to the next learning period. This greedy parameter adjustment method has been incorporated into basic DE, leading to a new DE algorithm termed as Greedy Adaptive Differential Evolution (GADE). GADE has been tested on 25 benchmark functions in comparison with five other DE variants. The results of evaluation demonstrate that GADE is strongly competitive: it obtained the best rank among the counterparts in terms of the summation of relative errors across the benchmark functions with a high dimensionality.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2016, 6, 2; 103-118
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gaussian process dynamic modeling and backstepping sliding mode control for magnetic levitation system of maglev train
    Autorzy:
    Sun, Yougang
    Wang, Sumei
    Lu, Yang
    Xu, Junqi
    Powiązania:
    https://bibliotekanauki.pl/articles/2086959.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    maglev train
    Gaussian process
    sliding mode control
    parameter perturbations
    Opis:
    The maglev trains are strongly nonlinear and open-loop unstable systems with external disturbances and parameters uncertainty. In this paper, the Gaussian process method is utilized to get the dynamic parameters, and a backstepping sliding mode controller is proposed for magnetic levitation systems (MLS) of maglev trains. That is, for a MLS of a maglev train, a nonlinear dynamic model with accurate parameters is obtained by the Gaussian process regression method, based on which a novel robust control algorithm is designed. Specifically, the MLS is divided into two sub-systems by a backstepping method. The inter virtual control inputs and the Lyapunov function are constructed in the first sub-system. For the second sub-system, the sliding mode surface is constructed to fulfil the design of the whole controller to asymptotically regulate the airgap to a desired trajectory. The stability of the proposed control method is analyzed by the Lyapunov method. Both simulation and experimental results are included to illustrate the superior performance of the presented method to cope with parameters perturbations and external disturbance.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2022, 60, 1; 49--62
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Algorithms of Sustainable Estimation of Unknown Input Signals in Control Systems
    Autorzy:
    Yusupbekov, Nadirbek
    Igamberdiev, Husan
    Mamirov, Uktam
    Powiązania:
    https://bibliotekanauki.pl/articles/385096.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    control system
    state
    signal reconstruction
    regularization
    regularization parameter
    układ sterowania
    stan
    rekonstrukcja sygnału
    regularyzacja
    parametr regularyzacji
    Opis:
    The problem of estimating unknown input effects in control systems based on the methods of the theory of optimal dynamic filtering and the principle of expansion of mathematical models is considered. Equations of dynamics and observations of an extended dynamical system are obtained. Algorithms for estimating input signals based on regularization and singular expansion methods are given. The above estimation algorithms provide a certain roughness of the filter parameters to various violations of the conditions of model problems, i.e. are not very sensitive to changes in the a priori data.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 4; 83-86
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Terminal control problem for processes represented by nonlinear multi parameter binary dynamic system
    Autorzy:
    Haci, Y. H.
    Ozen, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/969692.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    Boolean function
    difference equation
    piecewise curve
    Opis:
    In this paper, nonlinear multi parameter binary difference equation system (MPBDS) and optimal piecewise process are analyzed. Since such difference equation system is over-determined, a theorem similar to Frobenius's theorem is proved on Galois field. An illustrative example, which can be solved by applying terminal control problem is given. Then, terminal control problem is examined and it is shown that the principle of optimality is satisfied.
    Źródło:
    Control and Cybernetics; 2009, 38, 3; 625-633
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    LMI-based robust control of uncertain nonlinear systems via polytopes of polynomials
    Autorzy:
    Sánchez, Marcelino
    Bernal, Miguel
    Powiązania:
    https://bibliotekanauki.pl/articles/330548.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    robust control
    uncertain system
    nonlinear system
    linear parameter-varying systems
    LMIs
    sterowanie odporne
    układ niepewny
    układ nieliniowy
    układ liniowy niestacjonarny
    Opis:
    This investigation is concerned with robust analysis and control of uncertain nonlinear systems with parametric uncertainties. In contrast to the methodologies from the field of linear parameter varying systems, which employ convex structures of the state space representation in order to perform analysis and design, the proposed approach makes use of a polytopic form of a generalisation of the characteristic polynomial, which proves to outperform former results on the subject. Moreover, the derived conditions have the advantage of being cast as linear matrix inequalities under mild assumptions.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2019, 29, 2; 275-283
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Universal speed and flux estimator for induction motor
    Autorzy:
    Dybkowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193560.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    speed estimator
    rotor flux estimator
    parameter estimator
    induction motor
    MRAS
    universal estimator
    vector control
    Opis:
    In the paper, the concept of universal speed and flux estimator with additional parameters estimators is presented. Proposed solution is based on the Model Reference Adaptive System (MRAS) type flux and speed estimator and can be used in different industrial systems (especially in the automotive applications). Induction Motor (IM) parameters are estimated using the systems based only on simple simulators and adaptive systems (voltage model and current model). Proposed system was tested in the sensorless induction motor drive with the Direct Field Oriented Control (DFOC) algorithm. Simulation and experimental results are presented in the paper.
    Źródło:
    Power Electronics and Drives; 2018, 3, 38; 157-169
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strong decay for one-dimensional wave equations with nonmonotone boundary damping
    Autorzy:
    Pierre, M.
    Vancostenoble, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/205904.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    równanie falowe
    stabilność
    asymptotic behavior
    boundary control
    d'Alembert formula
    distribute parameter system
    global existence
    nonliner control system
    nonmonotone feedback
    stabilization
    wave equation
    Opis:
    This paper is a contribution to the following question : consider the classical wave equation damped by a nonlinear feedback control which is only assumed to decrease the energy. Then, do solutions to the perturbed system still exist for all time? Does strong stability occur in the sense that the energy tends to zero as time tends to infinity? We prove here that the answer to both questions is positive in the specific case of the one-dimensional wave equation damped by boundary controls which are functions of the observed velocity. The main point is that no monotonicity assumption is made on the damping term.
    Źródło:
    Control and Cybernetics; 2000, 29, 2; 473-484
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Contribution of New Parameter Inverses to Robustification of Fractional-Order Perfect Control for LTI MIMO Discrete-Time State-Space Systems
    Autorzy:
    Wach, Ł.
    Hunek, W. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/385005.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    LTI MIMO fractional-order systems
    perfect control
    inverses of nonsquare matrices
    stability
    Opis:
    The paper presents results of application of various right inverses to fractional-order discrete-time perfect control in terms of improving its stability and robustness. For that reason the newly introduced σ-inverse and H-inverse are applied finally to obtain the mentioned above control strategy strictly dedicated to LTI MIMO nonsquare systems described by state-space framework. It is highlighted that parameter σ-inverse and H-inverse with different so called ‘degrees of freedom’ outperform the typical minimum-norm right T-inverse. Moreover, this new approach deals with the same class of problems concerning integer-order systems. The simulation studies performed in Matlab/Simulink environment confirm high potential of proposed here method.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2016, 10, 3; 29-33
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive modeling of reliability properties for control and supervision purposes
    Autorzy:
    Dettmann, K. U.
    Söffker, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/907535.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    niezawodność
    estymacja parametrów
    kumulacja uszkodzeń
    reliability
    parameter estimation
    damage accumulation
    probabilistic simulation
    Opis:
    Modeling of reliability characteristics typically assumes that components and systems fail if a certain individual damage level is exceeded. Every (mechanical) system damage increases irreversibly due to employed loading and (mechanical) stress, respectively. The main issue of damage estimation is adequate determination of the actual state-of-damage. Several mathematical modeling approaches are known in the literature, focusing on the task of how loading effects damage progression (e.g., Wöhler, 1870) for wear processes. Those models are only valid for specific loading conditions, a priori assumptions, set points, etc. This contribution proposes a general model, covering adequately the deterioration of a set of comparable systems under comparable loading. The main goal of this contribution is to derive the loading-damage connection directly from observation without assuming any damage models at the outset. Moreover, the connection is not investigated in detail (e.g., to examine the changes in material, etc.) but only approximated with a probabilistic approach. The idea is subdivided into two phases: A problem-specific relation between loading applied (to a structure, which contributes to the stress) and failure is derived from simulation, where a probabilistic approach only assumes a distribution function. Subsequently, an adequate general model is set up to describe deterioration progression. The scheme will be shown through simulation-based results and can be used for estimation of the remaining useful life and predictive maintenance/control.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2011, 21, 3; 479-486
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust Identification of Parasitic Feedback Disturbances for Linear Lumped Parameter Systems
    Autorzy:
    Maksimov, V.
    Pandolfi, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/908079.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sterowanie ze sprzężeniem zwrotnym
    wskaźnik uszkodzeń
    input identification
    feedback control
    fault detection
    Opis:
    We study the problem of identification of an input to a linear finite-dimensional system. We assume that the input has a feedback form, which is related to a problem often encountered in fault detection. The method we use is to embed the identification problem in a class of inverse problems of dynamics for controlled systems. Two algorithms for identification of a feedback matrix based on the method of feedback control with a model are constructed. These algorithms are stable with respect to noise-corrupted observations and computational errors.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 4; 835-858
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameter selection of an adaptive PI state observer for an induction motor
    Autorzy:
    Białoń, T.
    Lewicki, A.
    Pasko, M.
    Niestrój, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/201948.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    luenberger observer
    induction motor
    multiscalar control system
    Opis:
    The paper discusses problems connected with the parameters selection of the proportional-integral observer, designed for reconstruction of magnetic fluxes and angular speed of an induction motor. The selection is performed in several stages that are focused on different criteria. The first stage consists in selecting observer’s gains and provides desired dynamical properties, taking into consideration immunity to disturbances and parameter variations of observed system. The second stage prevents an observer from DC-offset cumulation and instability. The last stage consists in setting the parameters of a speed adaptation mechanism. The impact of different settings on the properties of an observer is illustrated with experimental results, obtained in the multiscalar control system of an induction motor.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 599-603
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiz i razrabotka sposobov ucheta ogranichenijj na funkciju upravlenija dvizheniem gruzopodemnykh kranov
    Analysis and development of accounting methods for restrictions on functions traffic control load-lifting cranes
    Autorzy:
    Romasevich, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/76671.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    load-lifting crane
    control
    electrical drive
    tolerance
    mechanical parameter
    crane
    algorithm
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 3
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rotor flux oriented control of induction machine based drives with compensation for the variation of all machine parameters
    Autorzy:
    Extremiana, G.
    Abad, G.
    Arza, J.
    Chivite-Zabalza, J.
    Torre, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/202309.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    parameter on-line estimation
    rotor flux oriented control
    magnetizing curve
    iron losses
    Opis:
    The performance of rotor flux oriented induction motor drives, widely used these days, relies on the accurate knowledge of key machine parameters. In most industrial drives, the rotor resistance, subject to temperature variations, is estimated on-line due to its significant influence on the control behaviour. However, the rest of the model parameters are also subject to slow variations, determined mainly by the operating point of the machine, compromising the dynamic performance and the accuracy of the torque estimation. This paper presents an improved rotor-resistance on-line estimation algorithm that contemplates the iron losses of the electrical machine, the iron saturation curve and the mechanical losses. In addition, the control also compensates the rest of the key machine parameters such as the leakage and magnetizing inductances and the iron losses. These parameters are measured by an off-line estimation procedure and stored in look up-tables used by the control. The paper begins by presenting the machine model and the proposed rotor flux oriented control strategy. Subsequently, the off-line parameter measurement procedure is described. Finally, the algorithm is extensively evaluated and validated experimentally on a 15 kW test bench.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 2; 309-324
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An integrodifferential approach to modeling, control, state estimation and optimization for heat transfer systems
    Autorzy:
    Rauh, A.
    Senkel, L.
    Aschemann, H.
    Saurin, V. V.
    Kostin, G. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/331160.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    heat transfer
    predictive control
    optimal control
    state estimation
    disturbance estimation
    distributed parameter systems
    sensitivity analysis
    wymiana ciepła
    regulacja predykcyjna
    układ o parametrach rozłożonych
    analiza wrażliwości
    Opis:
    In this paper, control-oriented modeling approaches are presented for distributed parameter systems. These systems, which are in the focus of this contribution, are assumed to be described by suitable partial differential equations. They arise naturally during the modeling of dynamic heat transfer processes. The presented approaches aim at developing finite-dimensional system descriptions for the design of various open-loop, closed-loop, and optimal control strategies as well as state, disturbance, and parameter estimation techniques. Here, the modeling is based on the method of integrodifferential relations, which can be employed to determine accurate, finite-dimensional sets of state equations by using projection techniques. These lead to a finite element representation of the distributed parameter system. Where applicable, these finite element models are combined with finite volume representations to describe storage variables that are—with good accuracy—homogeneous over sufficiently large space domains. The advantage of this combination is keeping the computational complexity as low as possible. Under these prerequisites, real-time applicable control algorithms are derived and validated via simulation and experiment for a laboratory-scale heat transfer system at the Chair of Mechatronics at the University of Rostock. This benchmark system consists of a metallic rod that is equipped with a finite number of Peltier elements which are used either as distributed control inputs, allowing active cooling and heating, or as spatially distributed disturbance inputs.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 1; 15-30
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust LFT-LPV H∞ control of an underactuated inverted pendulum on a cart with optimal weighting functions selection by ga and es
    Autorzy:
    Hasseni, Seif-El-Islam
    Abdoul, Latifa
    Powiązania:
    https://bibliotekanauki.pl/articles/1837922.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    inverted pendulum on a cart
    robust control
    underactuated systems
    linear parameter varying systems
    H∞
    Opis:
    This article investigates the robust stabilization and control of the inverted pendulum on a cart against disturbances, measure-ment noises, and parametric uncertainties by the LFT-based LPV technique (Linear-Fractional-Transformation based Linear-Parameter-Varying). To make the applying of the LPV technique possible, the LPV representation of the inverted pendulum on a cart model is devel-oped. Besides, the underactuated constraint of this vehicle is overcome by considering both degrees of freedom (the rotational one and the translational one) in the structure. Moreover, the selection of the weighting functions that represent the desired performance is solved by two approaches of evolutionary algorithms; Genetic Algorithms (GA) and Evolutionary Strategies (ES) to find the weighting functions’ optimal parameters. To validate the proposed approach, simulations are performed and they show the effectiveness of the proposed approach to obtain robust controllers against external signals, as well as the parametric uncertainties.
    Źródło:
    Acta Mechanica et Automatica; 2020, 14, 4; 186-197
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A model-free direct predictive grid-current control strategy for grid-connected converter with an inductance-capacitance-inductance filter
    Autorzy:
    Guo, Leilei
    Zheng, Mingzhe
    Yu, Changzhou
    Xu, Haizhen
    Li, Yanyan
    Powiązania:
    https://bibliotekanauki.pl/articles/2202543.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    grid-connected converter
    GCC
    model-free predictive current control
    MFPCC
    parameter mismatch
    robustness
    Opis:
    The disadvantages of the conventional model predictive current control method for the grid-connected converter (GCC) with an inductance-capacitance-inductance (LCL) filter are a large amount of calculation and poor parameter robustness. Once parameters of the model are mismatched, the control accuracy of model predictive control (MPC) will be reduced, which will seriously affect the power quality of the GCC. The article intuitively analyzes the sensitivity of parameter mismatch on the current predictive control of the conventional LCL-filtered GCC. In order to solve these issues, a model-free predictive current control (MFPCC) method for the LCL-filtered GCC is proposed in this paper. The contribution of this work is that a novel current predictive robust controller for the LCL-filtered GCC is designed based on the principle of the ultra-local model of a single input single output system. The proposed control method does not require using any model parameters in the controller, which can effectively suppress the disturbances of the uncertain parameter variations. Compared with conventional MPC, the proposed MFPCC has smaller current total harmonic distortion (THD). When the filter parameters are mismatched, the control error of the proposed method is smaller. Finally, a comparative experimental study is carried out on the platform of Typhoon and PE-Expert4 to verify the superiority and effectiveness of the proposed MFPCC method for the LCL-filtered GCC.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 1; 23--42
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prosty sposób optymalizacji parametrycznej w metodzie (FOC) dla silnika indukcyjnego
    Simple method of parameters optimization in field orientated control (FOC) of induction motor
    Autorzy:
    Sieklucki, G.
    Orzechowski, T.
    Sykulski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/320192.pdf
    Data publikacji:
    2005
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    silnik indukcyjny
    falownik napięcia
    sterowanie polowo zorientowane
    FOC
    optymalizacja parametryczna
    regulacja prędkości kątowej
    induction motor
    voltage source inverter
    field oriented control
    angular speed control
    parameter optimization
    Opis:
    W artykule przedstawiono standardową strukturę układu sterowania polowo zorientowanego (FOC) regulacji prędkości silnika indukcyjnego zasilanego z falownika napięcia. Zaprezentowano prostą metodę doboru regulatorów prądów i prędkości (typu PI). Zamieszczono wyniki badań symulacyjnych.
    Standard structure of field orientated control (FOC) system of induction motor is presented. Simple method of parameters selection of currents and speed controller (type PI) are proposed. Simulation result of this control system are discussed.
    Źródło:
    Elektrotechnika i Elektronika; 2005, 24, 1; 93-99
    1640-7202
    Pojawia się w:
    Elektrotechnika i Elektronika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Continuity of Solutions of Riccati Equations for the Discrete-Time Jlqp
    Autorzy:
    Czornik, A.
    Świerniak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/908498.pdf
    Data publikacji:
    2002
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    automatyka
    coupled algebraic Ricatti equations
    jump parameter system
    quadratic control
    stochastic stabilizability
    observability
    robustness
    sensitivity
    Opis:
    The continuity of the solutions of difference and algebraic coupled Riccati equations for the discrete-time Markovian jump linear quadratic control problem as a function of coefficients is verified. The line of reasoning goes through the use of the minimum property formulated analogously to the one for coupled continuous Riccati equations presented by Wonham and a set of comparison theorems.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2002, 12, 4; 539-543
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Existence and solution sets of impulsive functional differential inclusions with multiple delay
    Autorzy:
    Helal, M.
    Ouahab, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/256052.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    impulsive functional differential inclusions
    decomposable set
    parameter differential inclusions
    AR-set
    control theory
    Opis:
    In this paper, we present some existence results of solutions and study the topological structure of solution sets for the following first-order impulsive neutral functional differential inclusions with initial condition: [formula] where J : = [0; b] and 0 = t0 < t1 < ... < tm < tm+1 = b (m ∈ N*), F is a set-valued map and g is single map. The functions Ik characterize the jump of the solutions at impulse points tk (k = 1, ... m). Our existence result relies on a nonlinear alternative for compact u.s.c. maps. Then, we present some existence results and investigate the compactness of solution sets, some regularity of operator solutions and absolute retract (in short AR). The continuous dependence of solutions on parameters in the convex case is also examined. Applications to a problem from control theory are provided.
    Źródło:
    Opuscula Mathematica; 2012, 32, 2; 249-283
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust quasi-LPV model reference FTC of a quadrotor UAV subject to actuator faults
    Autorzy:
    Rotondo, D.
    Nejjari, F.
    Puig, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/331147.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    linear parameter varying systems
    fault tolerant control
    quadrotor
    model reference based control
    linear matrix inequalities
    układ liniowy niestacjonarny
    sterowanie tolerujące uszkodzenia
    liniowe nierówności macierzowe
    Opis:
    A solution for fault tolerant control (FTC) of a quadrotor unmanned aerial vehicle (UAV) is proposed. It relies on model reference-based control, where a reference model generates the desired trajectory. Depending on the type of reference model used for generating the reference trajectory, and on the assumptions about the availability and uncertainty of fault estimation, different error models are obtained. These error models are suitable for passive FTC, active FTC and hybrid FTC, the latter being able to merge the benefits of active and passive FTC while reducing their respective drawbacks. The controller is generated using results from the robust linear parameter varying (LPV) polytopic framework, where the vector of varying parameters is used to schedule between uncertain linear time invariant (LTI) systems. The design procedure relies on solving a set of linear matrix inequalities (LMIs) in order to achieve regional pole placement and H∞ norm bounding constraints. Simulation results are used to compare the different FTC strategies.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 7-22
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Użytkowy model matematyczny quadrocoptera do celów sterowania
    Mathematical model of quadrocopter for control design purposes
    Autorzy:
    Kusalewicz, A.
    Armiński, K.
    Zubowicz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/269102.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
    Tematy:
    quadrocopter
    modelowanie matematyczne
    regresja liniowa
    quadcopter
    mathematical modelling
    parameter identification
    Opis:
    Celem pracy jest budowa użytkowego modelu matematycznego quadrocoptera (QC) z uwzględnieniem urządzeń wykonawczych (UW) oraz identyfikacja jego parametrów. Zadanie identyfikacji sprowadzono do rozwiązania trzech zadań optymalizacji. Wynikiem prac jest model QC uwzględniający wpływ zmian napięcia zasilania na działanie UW.
    The goal of the paper is to deliver the utility model of quadcopter (QC) dynamics. The focus is on including the information of powersource voltage drop in actuator system model and its parameter identification. The identification problem is initially set up as an optimisation task in function space due to the impact of the actuators. Under the stated assumptions regarding the actuator system model the identification problem is consequently decomposed into three independent optimisation tasks defined in the model parameter space. The designed laboratory experiments deliver inputoutput data sets used to solve the proposed optimisation tasks. Solving the optimisation tasks results in an utility model for control design purposes that encompasses the nonlinearity of the actuator system and the effects of the powersource voltage drop. The latter is obtained by interpolation of the discrete results into the continuous voltage domain by line fitting under the stated assumption. The obtained model features are considered key factors for the control system design to follow in the future work.
    Źródło:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2016, 51; 103-106
    1425-5766
    2353-1290
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gas exchange parameters in leaves and ears of winter wheat Triticum aestivum L. and its productivity under fungicide control conditions
    Wskaźniki wymiany gazowej liści i kłosów oraz produkcyjność pszenicy ozimej (Triticum aestivum L.) w warunkach ochrony fungicydowej
    Autorzy:
    Jarmolkowicz, J.K.
    Olszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/28414.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    gas exchange parameter
    leaf
    culm
    wheat culm
    winter wheat
    Triticum aestivum
    productivity
    fungicidal control
    control condition
    Opis:
    A research experiment was conducted in which rates of photosynthesis and transpiration were measured in leaves and ears of two winter wheat varieties grown under fungicide control conditions and without fungicide control. A LI-COR 6400 portable gas exchange system was used in the investigations. In most cases the fungicide Juwel was shown to have no effect on the gas exchange processes, whereas the other of the fungicidal agents applied – Swing – significantly decreased the gas exchange rates measured. Measurements of gas exchange parameters in ears showed that the intensity of gas exchange was low, in particular at the later stage of ear development. But the applied fungicide caused higher release of CO2 into the atmosphere than its uptake. Furthermore, the applied fungicides were found to significantly increase grain yield compared to the control treatment, both in the first and second year of the study. Among the tested varieties, ‘Nutka’ was characterized by higher productivity, in spite of lower 1000 kernel weight. However, this cultivar developed longer ears with a larger amount of grains.
    Źródło:
    Acta Agrobotanica; 2010, 63, 2
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dinamika mnogocilindrovykh dizelnykh dvigatelejj s regulirovaniem moshhnosti otkljucheniem cilindrov i ciklov
    Dynamics of multicylinder diesel engines with power control by deactivation of cylinders and cycles
    Autorzy:
    Beshun, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/76583.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    internal combustion engine
    combustion engine
    diesel engine
    power control
    deactivation process
    cylinder
    algorithm
    dynamic parameter
    rotation
    crankshaft
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 3
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dobór nastaw regulatora PI w układach regulacji procesów wzbogacania węgla
    PI controller tuning in control systems of the coal enrichment processes
    Autorzy:
    Kaula, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/216001.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    wzbogacanie węgla
    dynamika obiektu
    układ regulacji
    regulator PI
    nastawa regulatora
    coal enrichment
    dynamic model
    control system
    tuning method
    PI controller parameter
    Opis:
    Jednym z podstawowych zadań układów regulacji procesów wzbogacania węgla jest stabilizacja parametrów jakościowych na zadanym poziomie. Sterowanie procesów technologicznych wzbogacania węgla odbywa się w obecności szeregu zakłóceń. Zatem istotnym problemem jest wybór regulatora odpornego na różnorodne zakłócenia. Regulatory PI oraz PID są stosowane w wielu procesach przemysłowych. Szerokie zastosowanie tych regulatorów wynika z wielu zalet, którymi się charakteryzują. Najważniejsze z nich to dobre właściwości kompensacji zakłóceń występujących w procesach przemysłowych oraz prosta budowa tych regulatorów (a zatem łatwa implementacja). Wybór struktury PI albo PID regulatora zależy od właściwości dynamicznych sterowanego procesu, zakłóceń oddziałujących na ten proces oraz wymagań stawianych układowi regulacji. Ze względu na szereg zakłóceń występujących w procesach przeróbczych węgla stosowanie członu różniczkującego regulatora PID powinno być ograniczone, na przykład do stabilizacji wybranych parametrów w sterowaniu lokalnym. Celowym rozwiązaniem wydaje się zastosowanie struktury PI regulatora w układzie regulacji. Nie mniej ważnym zagadnieniem w regulacji procesu jest dobór nastaw regulatora. W wielu metodach doboru nastaw regulatora wykorzystuje się charakterystyki dynamiczne sterowanego procesu (model dynamiczny obiektu sterowania). Opis właściwości dynamicznych procesu za pomocą modelu matematycznego jest pomocny przy projektowaniu układu sterowania. Różne procesy charakteryzujące się takimi samymi właściwościami dynamicznymi można opisać modelem dynamicznym o takiej samej strukturze, różniącym się tylko wartościami parametrów. Takie podejście daje możliwość zastosowania tego samego typu regulatora w układach regulacji różnych procesów przemysłowych. Odnosi się to także do wielu procesów wzbogacania węgla. [...]
    One of the main tasks of control systems of coal enrichment process is the stabilization of coal quality parameters at a desired level. The control of coal enrichment processes is carried out in the presence of a number of disturbances. Therefore, a serious problem is the controller selecting which is robust to different disturbances. Controllers PI (proportional-plus-integral) and PID (proportional-plus-integral-plus-derivative) are used in many industrial processes. Extensive uses of PID controllers is results from a number of advantages that characterizes. The most important of them is good compensation of disturbances occurring in industrial processes and simple design of these controllers (therefore easy to implement). Selection of PI or PID controller structure depends on the dynamic properties of the controlled process and disturbances influencing to the process and the requirements for the control system. Due to a number of disturbances occurring in the coal preparation processes the application of a derivative element should be limited, for example, to stabilize the selected parameters in local control. The better solution seems to use the structure of PI controller in the control system. No less important problem in the control of the process is the tuning of the controller parameters. Many methods of tuning of the controller parameters uses the dynamic characteristics of the controlled process (dynamic model of the process). The description of the dynamic properties of the process by means of a mathematical model it is helpfully in the design of the control system. Different processes with the same dynamic properties can be described by a dynamic model of the same structure, differing only parameters values. Such approach makes it possible to use the same type of controller in control of various industrial processes. This is also relates for many coal enrichment processes. [...]
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2015, 31, 1; 141-154
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic control of morphological and physical characteristics determining resistance to lodging in barley [Hordeum vulgare L.]
    Autorzy:
    Jezowski, S.
    Surma, M.
    Adamski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/26024.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    heritability
    barley
    plant genetics
    resistance
    Hordeum vulgare
    genetic parameter
    Źródło:
    International Agrophysics; 2001, 15, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Introduction to the Special Section on State and Parameter Estimation Methods for Sensorless Drives
    Autorzy:
    Barut, M.
    Hinkkanen, M.
    Orlowska-Kowalska, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193677.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    sensorless control
    extended Kalman filter
    unscented Kalman filter
    MRAS estimators
    neural networks
    Opis:
    This short article constitutes an introductory part of the Special Section (SS) on State and Parameter Estimation Methods in Sensorless Drives. In the current issue of the journal, the first part of this section is published. Accepted articles are focussed mainly on estimation of the state variables and parameters for vector-controlled induction motor (IM) drives, using different concepts, such as different types of Kalman filters (KFs) and model reference adaptive systems (MRASs). The KF was also proposed for brushless DC motor (BLDC). Also, neural networks (NNs) have been proposed for mechanical state variables’ estimation of the drive system with elastic couplings.
    Źródło:
    Power Electronics and Drives; 2018, 3, 38; 111-113
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Active fault tolerance control of a wind turbine system using an unknown input observer with an actuator fault
    Autorzy:
    Li, S.
    Wang, H.
    Aitouche, A.
    Tian, Y.
    Christov, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/329822.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    wind turbine system
    linear parameter varying system
    fault tolerant control
    unknown input observer
    elektrownia wiatrowa
    sterowanie tolerujące uszkodzenia
    obserwator wejściowy
    Opis:
    This paper proposes a fault tolerant control scheme based on an unknown input observer for a wind turbine system subject to an actuator fault and disturbance. Firstly, an unknown input observer for state estimation and fault detection using a linear parameter varying model is developed. By solving linear matrix inequalities (LMIs) and linear matrix equalities (LMEs), the gains of the unknown input observer are obtained. The convergence of the unknown input observer is also analysed with Lyapunov theory. Secondly, using fault estimation, an active fault tolerant controller is applied to a wind turbine system. Finally, a simulation of a wind turbine benchmark with an actuator fault is tested for the proposed method. The simulation results indicate that the proposed FTC scheme is efficient.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 69-81
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of LabView environment for the bulding of supervision system controlling the climatic and technical parameters in farm rooms
    Wykorzystanie srodowiska LabView do budowy systemu nadzoru kontrolujacego parametry klimatyczne i techniczne w pomieszczeniach w gospodarstwie rolnym
    Autorzy:
    Buczaj, M.
    Sumorek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/792957.pdf
    Data publikacji:
    2011
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    control system
    supervising system
    LabView environment
    climatic parameter
    technical parameter
    building
    farm building
    electrical installation
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The control system based on FPGA technology for fatigue test stand MZGS-100 PL
    System sterowania maszyny do badań zmęczeniowych materiałów konstrukcyjnych typu MZGS 100-PL w technologii FPGA
    Autorzy:
    Macek, W.
    Macha, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/139983.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FPGA
    control system
    mechatronics
    fatigue test
    strain energy parameter
    system sterujący
    mechatronika
    test zmęczeniowy
    energetyczna charakterystyka zmęczeniowa
    Opis:
    The paper presents a solution of the control system for fatigue test stand MZGS-100 PL, comprising the integrated Real-Time controller based on FPGA (Field-Programmable Gate Array) technology with LabVIEW software. The described control system performs functions such as continuous regulation of speed induction motor, measuring strain of the lever machine and the test specimen, displacement of the polyharmonic vibrator, as well as the elimination of interferences, overload protection and emergency stop of the machine. The fatigue test stand also allows to set the pseudo-random history of energy parameter W(t).
    W pracy przedstawiono rozwiązanie układu sterowania maszyny zmęczeniowej MZGS-100PL, w oparciu o zintegrowany sterownik czasu rzeczywistego NI cRIO-9074 z oprogramowaniem Lab-VIEW w technologii FPGA. Przedstawiony układ sterowania umożliwia płynną regulację prędkości obrotowej silnika indukcyjnego, pomiar odkształceń dźwigni maszyny i badanej próbki, przemieszczenie wibratora poliharmonicznego, jak również eliminację zakłóceń oraz zabezpieczenie przed przeciążeniem i zatrzymanie awaryjne maszyny. Zaprezentowany system mechatroniczny do wyznaczania energetycznych charakterystyk zmęczeniowych materiałów przy zginaniu i skręcaniu pozwala na wyznaczanie energetycznych charakterystyk zmęczeniowych materiałów (Wa-N) przy obciążeniach cyklicznych oraz generowanie obciążeń pseudolosowych (poliharmonicznych).
    Źródło:
    Archive of Mechanical Engineering; 2015, LXII, 1; 85-100
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The method of selecting the interval of functional tests taking into account economic aspects and legal requirements
    Autorzy:
    Piesik, Jan
    Piesik, Emilian
    Śliwiński, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/385226.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    functional test
    maintenance engineering
    parameter
    optimisation
    safety analysis
    time-schedule control
    tires
    Opis:
    The article discusses the problem of choosing the optimal frequency of functional tests, taking into account the reliability and law requirements, but also the impact of business aspects in the company. The subject of functional test interval is well described for purposes of the process industry. Unfortunately, this is not the case for the machinery safety functions with low demand mode. This is followed by a presentation of the current business approach, which, in order to achieve industrial excellence, monitor their performance through the appropriate selection of key performance indicators. In addition, companies are increasingly exploring potential risks in the following areas: new challenges in advanced risk management, including the perception of the company’s facilities as a safe workplace insight of customers and business partners. Eliminating potential hazards is increasingly taking into account, especially the impact of human activity and its interaction with machines. The case study has been presented based on the machines used for the production of tire semi-finished products. In this article, the authors propose a solution for selecting the interval of functional tests of safety functions and additional machine protection measures as a compromise to achieve satisfactory results in terms of safety requirements, performance and legal requirements.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2020, 14, 2; 91-98
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pirimicarb, an aphid selective insecticide, adversely affects demographic parameters of the aphid predator Hippodamia variegata (Goeze) (Coleoptera: Coccinellidae)
    Autorzy:
    Rahmani, S.
    Bandani, A.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/66870.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    carbamate
    pirimicarb
    insecticide
    demographic parameter
    Hippodamia variegata
    Coleoptera
    Coccinellidae
    aphid
    pest control
    Opis:
    Demographic toxicology is recommended for toxicity determination of the long term effects of a pesticide since it gives a more accurate and efficient measure of the effect of a pesticide. Thus, in the current study the sublethal effects of pirimicarb (carbamate insecticide) two concentrations of LC30 and LC10 were used against third instar larvae of Hippodamia variegata (Goeze) in order to determine the effects of the pesticide on demographic parameters of the predator under laboratory conditions. Results showed that pirimicarb did not affect individual life parameters such as development time of larva, pupa, adult longevity, female and male longevity, adult preoviposition period (APOP), and total preoviposition period (TPOP). However, population parameters such as intrinsic rate of increase (r), net reproductive rate (R0), mean generation time (T), and finite rate of increase (λ) was affected by sublethal treatment. For example, intrinsic rate of increase (r) was 0.18 day–1 in the controls but it was 0.13 and 0.14 day–1 in the treated insects with LC10 and LC30 concentrations, respectively. Also, there were significant differences between mean generation time (T) of the treatments and the controls i.e. mean generation time of the controls was 29.03 days while mean generation time in the two treatments of LC10 and LC30 was 33.93 and 31.66 days, respectively. The finite rate of increase was also significantly affected by sublethal effects of the pesticide. The results showed that pirimicarb, even at low concentrations, has potential to adversely affect the predatory ladybird, therefore care should be taken when this insecticide is used in the Integrated Pest Management (IPM) program.
    Źródło:
    Journal of Plant Protection Research; 2016, 56, 4
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Formation of information base for controlling settlement of solid-phase ore slurry particles in a thickener
    Autorzy:
    Morkun, Vladimir
    Morkun, Natalia
    Tron, Vitalii
    Serdiuk, Oleksandra
    Haponenko, Alona
    Haponenko, Iryna
    Powiązania:
    https://bibliotekanauki.pl/articles/2233646.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    thickener
    ultrasonic
    automatic control
    modelling
    parameter estimation
    Opis:
    Thickeners are process units that are often used at mining enterprises. There, they are involved in dehydration of mineral con-centration products when water is removed from wet tailings containing metal concentrates. In mineral processing, large quantities of process water are used to separate different minerals from each other, so dehydration plays a major role in ore processing and preparation for concentration. This research aims to develop methods and tools of ultrasonic measurement of characteristics of settlement of solid-phase slurry particles and to assess their possible application to the automatic control system of the thickener to improve its efficiency.
    Źródło:
    Acta Mechanica et Automatica; 2023, 17, 3; 410--416
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finite-time adaptive modified function projective multi-lag generalized compound synchronization for multiple uncertain chaotic systems
    Autorzy:
    Li, Q.
    Liu, S.
    Chen, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/331032.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    finite-time adaptive control
    unknown parameter
    chaotic system
    sterowanie adaptacyjne
    parametr nieznany
    układ chaotyczny
    Opis:
    In this paper, for multiple different chaotic systems with fully unknown parameters, a novel synchronization scheme called ‘modified function projective multi-lag generalized compound synchronization’ is put forward. As an advantage of the new method, not only the addition and subtraction, but also the multiplication of multiple chaotic systems are taken into consideration. This makes the signal hidden channels more abundant and the signal hidden methods more flexible. By virtue of finite-time stability theory and an adaptive control technique, a finite-time adaptive control scheme is established to realize the finite-time synchronization and to properly evaluate the unknown parameters. A detailed theoretical derivation and a specific numerical simulation demonstrate the feasibility and validity of the advanced scheme.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 4; 613-624
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Increase accuracy of system operation of unloading heavy coal sinks and middlings in jigs
    Povyshenie tochnosti raboty sistemy razgruzki porody i promprodukta v ostadochnojj mashine
    Autorzy:
    Lehtsier, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/792342.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    coal bed
    process parameter
    automatic control
    oscillatory process
    delamination
    float sensor
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 2
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robustifying analysis of the direct adaptive control of unknown multivariable nonlinear systems based on a new neuro-fuzzy method
    Autorzy:
    Theodoridis, D. C.
    Boutalis, Y.S.
    Christodoulou, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/91598.pdf
    Data publikacji:
    2011
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    nonlinear systems
    control
    neuro-fuzzy dynamical system
    fuzzy systems
    FS
    fuzzy recurrent high order neural network
    F-RHONN
    adaptive regulator
    parameter
    “Hopping”
    “Modified Hopping”
    modeling errors
    asymptotic regulation
    Opis:
    In this paper, we are dealing with the problem of directly regulating unknown multivariable affine in the control nonlinear systems and its robustness analysis. The method employs a new Neuro-Fuzzy Dynamical System definition, which uses the concept of Fuzzy Systems (FS) operating in conjunction with High Order Neural Networks. In this way the unknown plant is modeled by a fuzzy - recurrent high order neural network structure (F-RHONN), which is of the known structure considering the neglected nonlinearities. The development is combined with a sensitivity analysis of the closed loop in the presence of modeling imperfections and provides a comprehensive and rigorous analysis showing that our adaptive regulator can guarantee the convergence of states to zero or at least uniform ultimate boundedness of all signals in the closed loop when a not-necessarily-known modeling error is applied. The existence and boundedness of the control signal is always assured by employing a method of parameter “Hopping” and “Modified Hopping”, which appears in the weight updating laws. Simulations illustrate the potency of the method showing that by following the proposed procedure one can obtain asymptotic regulation despite the presence of modeling errors. Comparisons are also made to simple recurrent high order neural network (RHONN) controllers, showing that our approach is superior to the case of simple RHONN’s.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2011, 1, 1; 59-79
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identyfikacja parametrów modelu matematycznego maszyny elektrycznej z regulacją strumienia magnesów trwałych
    Parameters Identification of Mathematical Model of the Permanent Magnet Synchronous Machines with Flux Control
    Autorzy:
    Szkolny, S.
    Jakubowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1367513.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    maszyny elektryczne
    modele matematyczne
    identyfikacja parametrów
    electrical machines
    mathematical models
    parameter identification
    Opis:
    The problem with parameters identification of the mathematical model of permanent magnet synchronous machine with flux control is that the inductive parameters are not constant, because of the nature of the spatial nature of electromagnetic phenomena. Results may change depending on the flux, but also on the position of the rotor. This article describes of the method parameters identify of permanent magnet synchronous machines and formulates conclusions on the method presented in the paper.
    Podstawową trudnością przy identyfikacji parametrów modelu matematycznego maszyn wzbudzanych magnesami trwałymi z regulacją strumienia jest to, że parametry indukcyjne nie mają stałego charakteru ze względu na przestrzenny charakter zjawisk elektromagnetycznych. Mogą się one zmieniać w zależności od wartości strumienia, ale również od położenia wirnika. W artykule przedstawiono propozycję metodyki eksperymentalnej identyfikacji parametrów maszyn wzbudzanych magnesami trwałymi oraz sformułowano wnioski dotyczące metody przedstawionej w artykule.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2015, 4, 108; 15-20
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opredelenie upravljaemosti i ustrojjchivosti dvizhenija mashinno-traktornykh agregatov modelirovaniem parcialnykh uskorenijj
    Definition of machine-tractor units motion controllability and stability by modelling of partial accelerating
    Autorzy:
    Artjomov, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/77433.pdf
    Data publikacji:
    2013
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    machine tractor unit
    dynamic parameter
    control
    stability
    deviation angle
    calculation method
    operation cost
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 7
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gain-scheduled state-feedback control for active cancellation of multisine disturbances with time-varying frequencies
    Dyskretny regulator LTV do eliminacji składowych harmonicznych zakłóceń ze zmienną w czasie częstotliwością
    Autorzy:
    Heins, W.
    Ballesteros, P.
    Bohn, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/368951.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    aktywne sterowanie hałasem
    redukcja zakłóceń
    układ liniowy niestacjonarny
    obserwator
    sprzężenie od stanu
    active noise control
    disturbance rejection
    gain scheduling
    linear parameter-varying systems
    observers
    state feedback
    Opis:
    The paper presents a discrete-time LTV controller for the rejection of harmonic disturbances with time-verying based on a state-augmented observer-based state-feedback controller with a time-verying internal model and a scheduled state-feed back gain. The control design method is based on quadratic stability for LPV systems. The design is carried out in discrete time and the controller can easily be implemented on real-time hardware.
    W pracy przedstawiono dyskretny regulator LTV do eliminacji składowych harmonicznych zakłóceń. Wprowadzony regulator bazuje na sprzężeniu od zmiennych stanu z zależnym od czasu wewnętrznym modelem. Konstrukcja regulatora wykorzystuje własności stabilności układów LPV. Regulator został opisany równaniami dyskretnymi i może być łatwo zaimplementowany w układach czasu rzeczywistego.
    Źródło:
    Mechanics and Control; 2011, 30, 3; 127-137
    2083-6759
    2300-7079
    Pojawia się w:
    Mechanics and Control
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid synchronization and parameter estimation of a complex chaotic network of permanent magnet synchronous motors using adaptive integral sliding mode control
    Autorzy:
    Siddique, Nazam
    Rehman, Fazal U.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173614.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaotic systems
    hybrid synchronization
    HS
    complex chaotic permanent magnet synchronous motor
    adaptive integral sliding mode control
    ISMC
    Lyapunov function
    systemy chaotyczne
    synchronizacja hybrydowa
    złożony chaotyczny silnik synchroniczny z magnesami trwałymi
    adaptacyjne zintegrowane sterowanie trybem przesuwu
    funkcja Lapunowa
    Opis:
    The synchronisation of a complex chaotic network of permanent magnet synchronous motor systems has increasing practical importance in the field of electrical engineering. This article presents the control design method for the hybrid synchronization and parameter estimation of ring-connected complex chaotic network of permanent magnet synchronous motor systems. The design of the desired control law is a challenging task for control engineers due to parametric uncertainties and chaotic responses to some specific parameter values. Controllers are designed based on the adaptive integral sliding mode control to ensure hybrid synchronization and estimation of uncertain terms. To apply the adaptive ISMC, firstly the error system is converted to a unique system consisting of a nominal part along with the unknown terms which are computed adaptively. The stabilizing controller incorporating nominal control and compensator control is designed for the error system. The compensator controller, as well as the adopted laws, are designed to get the first derivative of the Lyapunov equation strictly negative. To give an illustration, the proposed technique is applied to 4-coupled motor systems yielding the convergence of error dynamics to zero, estimation of uncertain parameters, and hybrid synchronization of system states. The usefulness of the proposed method has also been tested through computer simulations and found to be valid.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; art. no. e137056
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-invasive parameter identification by using the least squares method
    Nieinwazyjna identyfikacja parametrów przy wykorzystaniu metody najmniejszych kwadratów
    Autorzy:
    Neugebauer, R.
    Hellmich, A.
    Hofmann, S.
    Schlegel, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/140192.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    identyfikacja parametrów
    metoda najmniejszych kwadratów
    urządzenia kontrolujące pracę serwonapędów
    parameters identification
    least squares method
    motion control
    Opis:
    The paper presents an adapted least squares identification method for reduced-order parametric models. On the example of the open velocity loop, different model approaches were implemented in a motion control system. Furthermore, it is demonstrated how the accuracy of the method can be improved. Finally, experimental results are shown.
    W artykule przedstawiono metodę identyfikacji, wykorzystującą metodę najmniejszych kwadratów, przystosowaną do modeli parametrycznych ograniczonego rzędu. Na przykładzie otwartej pętli regulacji prędkości zilustrowano różne podejścia do modelowania systemów sterowania. Zademonstrowano ponadto, jak można poprawić dokładność metody. W końcowej części pracy przedstawiono wyniki doświadczalne.
    Źródło:
    Archive of Mechanical Engineering; 2011, LVIII, 2; 185-194
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid synchronization and parameter estimation of a complex chaotic network of permanent magnet synchronous motors using adaptive integral sliding mode control
    Autorzy:
    Siddique, Nazam
    Rehman, Fazal U.
    Powiązania:
    https://bibliotekanauki.pl/articles/2128164.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaotic systems
    hybrid synchronization
    HS
    complex chaotic permanent magnet synchronous motor
    adaptive integral sliding mode control
    ISMC
    Lyapunov function
    systemy chaotyczne
    synchronizacja hybrydowa
    złożony chaotyczny silnik synchroniczny z magnesami trwałymi
    adaptacyjne zintegrowane sterowanie trybem przesuwu
    funkcja Lapunowa
    Opis:
    The synchronisation of a complex chaotic network of permanent magnet synchronous motor systems has increasing practical importance in the field of electrical engineering. This article presents the control design method for the hybrid synchronization and parameter estimation of ring-connected complex chaotic network of permanent magnet synchronous motor systems. The design of the desired control law is a challenging task for control engineers due to parametric uncertainties and chaotic responses to some specific parameter values. Controllers are designed based on the adaptive integral sliding mode control to ensure hybrid synchronization and estimation of uncertain terms. To apply the adaptive ISMC, firstly the error system is converted to a unique system consisting of a nominal part along with the unknown terms which are computed adaptively. The stabilizing controller incorporating nominal control and compensator control is designed for the error system. The compensator controller, as well as the adopted laws, are designed to get the first derivative of the Lyapunov equation strictly negative. To give an illustration, the proposed technique is applied to 4-coupled motor systems yielding the convergence of error dynamics to zero, estimation of uncertain parameters, and hybrid synchronization of system states. The usefulness of the proposed method has also been tested through computer simulations and found to be valid.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; e137056, 1--9
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rejection of harmonic and transient disturbances of a smart structure with piezoelectric actuators
    Autorzy:
    Duarte, F.
    Ballesteros, P.
    Shu, X.
    Bohn, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/368993.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    active vibration control
    gain scheduling
    linear parameter-varying systems
    piezoelectric actuators
    aktywne tłumienie drgań
    harmonogramowanie wzmocnienia
    liniowy układ niestacjonarny
    aktuatory piezoelektryczne
    Opis:
    Light flexible structures are easily prone to vibrate due to external forces or due to forces generated in the inner structure. This situation is common in machinery or mechanical structures with rotational devices. The unwanted vi-bration of such structures can be compensated with the addition of piezoelectric actuators for active vibration control (AVC). The rejection of harmonic disturbances is frequently done with controllers based on the internal model principle. The goal of this research is to reduce the effect of harmonic disturbances with known (measured) time-varying fre¬quencies acting on a system as well as to increase the damping of the system for the transient response (first mode of vibration). The experimental setup is made up of a slender aluminium flexible beam, a pair of piezoelectric actuators, an accelerometer and two DC motors, as well as the data acquisition and signal conditioning equipment. The harmonic disturbance is generated by DC motors. The control design utilizes an augmented description of the plant. The plant including the disturbance is modelled as a polytopic linear parameter-varying (pLPV) system. An observer-based gain-scheduling controller is calculated based on quadratic stability and the stability is guaranteed for the specified range ofvariation of the scheduling parameters, also restriction in the performance is introduced in the sense of the H2-norm. Experimental results show very good disturbance cancellation.
    Lekkie konstrukcje są podatne na drgania wzbudzane przez wymuszenia zewnętrzne oraz siły występujące wewnątrz układu. Drgania tego typu konstrukcji mogą być zredukowane przy zastosowaniu aktuatorów piezoelektrycznych i układów aktywnej regulacji. Układy eliminacji drgań często wykorzystują regulatory zaprojektowane przy wykorzysta¬niu modelu obiektu. Celem obecnych badań była redukcja wpływu harmonicznie zmiennych parametrów układu oraz zwiększenie tłumienia drgań nieustalonych. Obiekt sterowania został zamodelow any jako liniowy układ niestacjonarny. Układ regulacji uwzględniający obserwator stanu został zaprojektowany przy wykorzystaniu normy H2. Przeprowadzono weryfikację doświadczalną zaproponowanej metody. W skład stanowiska doświadczalnego wchodziły: podatna bel¬ka wykonana z aluminium, para aktuatorów piezoelektrycznych, akcelerometr, dwa silniki prądu stałego oraz układ akwizycji danych i ich kondycjonowania. Zaburzenie harmoniczne było generowane przez silniki prądu stałego. Wyniki badań doświadczalnych potwierdziły dużą skuteczność zaproponowanej metody redukcji drgań.
    Źródło:
    Mechanics and Control; 2013, 32, 2; 41-51
    2083-6759
    2300-7079
    Pojawia się w:
    Mechanics and Control
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The application of fuzzy logic integrated with Taguchi method in optimizing process parameter to reduce the time cycle
    Zastosowanie logiki rozmytej i metody Taguchiego w optymalizacji parametrów procesu produkcyjnego
    Autorzy:
    Gholizadeh, H.
    Fazlollahtabar, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/175690.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Fuzzy Taguchi method
    cycle time
    optimization
    control parameters
    metoda Taguchiego
    czas cyklu produkcyjnego
    optymalizacja
    parametry sterujące
    Opis:
    Given the importance of quality and responsiveness of manufacturing companies to customers, the most important principle can be considered reducing the cycle time of the production process. Since preserving the quality standards in a disposable necessities manufacturer is important, the Fuzzy Taguchi method as a powerful design optimization tool is used to determine the quality and design of optimal control parameters. Because in the real world due to measurement errors and inaccuracies in information and uncertainty in processes, fuzzy concepts have been used. Therefore, in this study, the parameters for controlling the process of disposable essentials are optimized to reduce the time cycle. Also, S/N and ANOVA methods have been used to study the characteristics of process performance. The four control parameters affecting the feed rate of the sheet, the machine wind pressure, and the mold temperature and sheet thickness affect the quality of the process. And Taguchi Fuzzy is a systematic and efficient method that reduces the cycle time. Experimental results have been reviewed and presented to evaluate the effectiveness of this approach in the Kach Company.
    Czas trwania cyklu procesu produkcyjnego jest jednym z podstawowych czynników zarówno zapewnienia wysokiej jakości produkcji jak również zmniejszenia czasu reakcji producentów na wymagania klienta. W pracy prowadzono optymalizację parametrów sterujących stosowanych w procesie produkcji wyrobów jednorazowego użytku dla skrócenia czasu cyklu produkcyjnego. Do badań przyjęto metodę Taguchiego z elementami logiki rozmytej. Uwzględniono w procesie optymalizacji wpływ błędów pomiarowych, niedokładność danych wejściowych oraz niepewność w ustaleniu prawidłowych wartości parametrów procesu. Stosowano w badaniach cztery parametry sterujące procesu: grubość arkusza tworzywa, prędkość podawania arkusza, ciśnienie robocze maszyny i temperaturę matrycy. Stosowano metodę S/N i analizę wariancji (ANOVA) dla oceny przebiegu procesu produkcyjnego. Wyniki analizy danych doświadczalnych były podstawą oceny efektywności optymalizacji procesu produkcyjnego w firmie Kach Company.
    Źródło:
    Advances in Manufacturing Science and Technology; 2018, 42, 1-4; 55-66
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optikoehlektronnaja sistema dlja izmerenija morfometricheskikh parametrov ryby prjamym metodom
    System optoelektroniczny do pomiarów parametrów morfometrycznych ryb metodą bezposrednią
    Opticoelectronic system for measuring parameters morphometric of fish by a direct method
    Autorzy:
    Fatychov, J.A.
    Ageev, O.V.
    Dutkiewicz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2331.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Inżynierii i Techniki Przetwórstwa Spożywczego Spomasz; Politechnika Koszalińska. Katedra Procesów i Urządzeń Przemysłu Spożywczego
    Tematy:
    fish
    morphometric parameter
    laser scanner
    fish processing
    machine control
    optical system
    electronic system
    Opis:
    W pracy przedstawiono możliwości zastosowania metody bezpośredniego pomiaru podstawowych parametrów ryb dla potrzeb sterowania maszynową obróbką ryb. Uzasadniono celowość zbudowania układu opticoelektronicznego dla pomiaru długości, wysokości i szerokości ryb. Przeanalizowano drogi stworzenia matematycznych podstaw układu opticoelektronicznego i rozpatrzono środki techniczne do jego budowy.
    The paper presents the applicability of the method of direct measurement of the basic parameters of fish for the fish processing machine control. It has been justified the purposefulness of building a system for optoelectronic measuring of the length, height and width of fish. The ways to create the mathematical basis of optoelectronic system were analyzed and dealt with the technical means for its construction.
    Źródło:
    Inżynieria Przetwórstwa Spożywczego; 2012, 2
    2084-9494
    2300-2018
    Pojawia się w:
    Inżynieria Przetwórstwa Spożywczego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of the application of the biological control agent EM1 on gas exchange parameters and productivity of Pisum sativum L. infected with Fusarium oxysporum Schlecht
    Wpływ preparatu mikrobiologicznego EM1 na wskaźniki wymiany gazowej, produktywność oraz występowanie fuzaryjnego więdnięcia grochu siewnego (Fusarium oxysporum)
    Autorzy:
    Okorski, A.
    Olszewski, J.
    Glowacka, K.
    Okorska, S.
    Pszczolkowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/28148.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    biological control
    gas exchange parameter
    productivity
    Pisum sativum
    plant disease
    Fusarium oxysporum
    pea plant
    plant health
    health status
    Opis:
    A pot experiment on different methods of EM 1 application was conducted in the period 2002–2004. The study was carried out under controlled growth conditions. The experimental factor was the method of EM1 application. Before application, the biological preparation EM1 was propagated as recommended by the manufacturer (Greenland). The health status of the aboveground parts of ‘Ramrod’ pea plants was estimated at the flowering stage. The assessment of pea leaf gas exchange parameters (An, E, Gs, and Ci) was made using a LI-Cor 6400 Portable Photosynthesis System. Soil application of EM1 combined with chemical control contributed to inhibiting Fusarium wilt of pea. Foliar application of EM1 combined with chemical control increased all gas exchange rates of pea leaves. Fusarium wilt of pea insignificantly decreased all gas exchange rates of pea leaves and the number of seeds per pod. The best method of EM1 application was soil treatment combined with chemical control, which increased all yield-related morphometric parameters of pea.
    Źródło:
    Acta Agrobotanica; 2010, 63, 2
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of the control parameters on the stability of a laminar boundary layer on a porous flat plate
    Autorzy:
    Lihonou, T. F.
    Monwanou, A. V.
    Miwadinou, C. H.
    Chabi Orou, J. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2174178.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    przepuszczalność
    liczba Reynoldsa
    metoda kolokacji
    permeability parameter
    small Reynolds number
    linear temporal stability
    boundary layer
    modified Orr-Sommerfeld equation
    spectral collocation method
    Opis:
    This work is devoted to the analysis of the linear temporal stability of a laminar dynamic boundary layer on a horizontal porous plane plate. The basic flow is assumed to be laminar and two-dimensional. The basic flow velocity profiles are obtained by numerically solving the Blasius equation using the Runge-Kutta method. The perturbations of these basic solutions are expressed in the form of three-dimensional Tollmien-Schlichting waves. The formulation of the stability problem leads to the Orr-Sommerfeld equation modified by the permeability parameter (Darcy number) and the small Reynolds number. This equation is given in a general form which can be applied to the Chebyshev domain and the boundary layer domain and solved numerically using the Chebyshev spectral collocation method. The marginal stability diagrams, the critical Reynolds numbers and the eigenvalue spectra are obtained for different values of the parameters which have modified the stability equation. Numerical solutions indicate the importance of the effect of these parameters on the flow stability characteristics.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 4; 113--127
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ewolucyjny dobór parametrów regulatorów PI w układzie sterowania polowo-zorientowanego z silnikiem pierścieniowym
    Evolutionary parameter selection in controllers PI in field-oriented control systems of a slip-ring motor
    Autorzy:
    Hudy, W.
    Jaracz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/187738.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG
    Tematy:
    silnik indukcyjny
    silnik pierścieniowy s211e44
    układ napędowy
    induction motor
    power transmission system
    slip-ring motor s211e44
    Opis:
    Współczesne układy napędowe z silnikami indukcyjnymi (w tym pierścieniowymi) budowane są z wykorzystaniem przemienników częstotliwości, często z możliwością odzyskiwania energii. Są to układy z bezpośrednim sterowaniem momentem lub ze sterowaniem polowo-zorientowanym. W niniejszej pracy wykorzystując algorytm ewolucyjny dobrano wartości nastaw regulatorów (strumienia, prędkości, momentu elektromagnetycznego i prądów) w układzie sterowania polowo-zorientowanego z silnikiem pierścieniowym s211e44. Funkcją uczącą była skokowa zmiana wartości prędkości obrotowej oraz skokowo zadana zmiana momentu obciążenia podczas pracy silnika. Układ sterowania zweryfikowano przy pomocy pakietu MATLAB/Simulink.
    Contemporary power transmission systems with induction motors (including slip-ring motors) are produced with use of frequency converters allowing frequently the energy recovery. These are the systems with direct moment control or field-oriented control. Using the evolutionary algorithm, the settings (flux, speed, electromagnetic moment, and currents) of controllers applied in the field-oriented control system of a slip-ring motor s211e44 were matched in this work. The learning function was a step change in rotational speed and a stepwise set of load torque during operation of the motor. The control system has been verified by means of the MATLAB/Simulink kit.
    Źródło:
    Mechanizacja i Automatyzacja Górnictwa; 2010, R. 48, nr 2, 2; 27-29
    0208-7448
    Pojawia się w:
    Mechanizacja i Automatyzacja Górnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination the dynamic parameters of the controlled technological processes of coal preparation by using the semi graphical method
    Opredelenie dinamicheskikh parametrov kontroliruemykh tekhnologicheskikh processov obogashhenija uglja s pomoshhju grafoanaliticheskogo metoda
    Autorzy:
    Lehtsier, O.
    Ulshin, V.
    Kilymnik, O.
    Pismenskiy, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/793011.pdf
    Data publikacji:
    2012
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    coal preparation
    technological process
    graphical method
    analytical method
    dynamic parameter
    automated control system
    transition function
    algorithm
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the Sedimentation Process in the Thickener by Using the Parameters of Longitudinal Ultrasonic Oscillations and Lamb Waves
    Autorzy:
    Morkun, Vladimir
    Morkun, Natalia
    Tron, Vitalii
    Serdiuk, Oleksandra
    Haponenko, Alona
    Powiązania:
    https://bibliotekanauki.pl/articles/31339774.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    thickener
    ultrasound
    automatic control
    modeling
    parameter estimation
    Opis:
    Water is widely used in the mining industry, particularly in mineral enrichment processes. In the process of magnetic separation or flotation of crushed ore, a concentrate (an enriched product), and tailings (a product with a low content of a useful component) are obtained. One of the main tasks of enrichment processes is the efficient use of water resources. This is achieved by reclaiming and subsequent reusing water contained in ore beneficiation products by extracting it in industrial thickeners. Optimizing this process makes it possible to reduce water usage in the mining industry, reduce costs of mineral enrichment processes, and address extremely urgent environmental protection problems. To evaluate the process of sedimentation of the solid phase in the pulp within the thickener, measurements of parameters of longitudinal ultrasonic oscillations and Lamb waves that have traveled a fixed distance in the pulp and along the measuring surface in contact with it are used. The proposed approach allows for the consideration of pulp density, particle size of the solid phase in the ore material and the dynamics of changes in these parameters in the thickener at the initial stage of the sedimentation process. Based on the obtained values, adjustments can be made to the characteristics of its initial product, leading to reduced water usage and minimized loss of a useful component.
    Źródło:
    Archives of Acoustics; 2023, 48, 4; 539-548
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-86 z 86

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies