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    Wyświetlanie 1-33 z 33
    Tytuł:
    Unified design method of time delayed PI controller for first order plus dead-time process models with different dead-time to time constant ratio
    Autorzy:
    Pathiran, Arun R.
    Muniraj, R.
    Iruthayarajan, M. Willjuice
    Prabhu, S. R. Boselin
    Jarin, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1409359.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    PI controller
    time delayed PI controller
    dead-time compensation
    Opis:
    The time delay element present in the PI controller brings dead-time compensation capability and shows improved performance for dead-time processes. However, design of robust time delayed PI controller needs much responsiveness for uncertainty in dead-time processes. Hence in this paper, robustness of time delayed PI controller has been analyzed for First Order plus Dead-Time (FOPDT) process model. The process having dead-time greater than three times of time constant is very sensitive to dead-time variation. A first order filter is introduced to ensure robustness. Furthermore, integral time constant of time delayed PI controller is modified to attain better regulatory performance for the lag-dominant processes. The FOPDT process models are classified into dead-time/lag dominated on the basis of dead-time to time constant ratio. A unified tuning method is developed for processes with a number of dead-time to time constant ratio. Several simulation examples and experimental evaluation are exhibited to show the efficiency of the proposed unified tuning technique. The applicability to the process models other than FOPDT such as high-order, integrating, right half plane zero systems are also demonstrated via simulation examples.
    Źródło:
    Archives of Control Sciences; 2021, 31, 2; 447-476
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control of the mobile robot using controllers of types P, PI, PID
    Autorzy:
    Skrobek, D.
    Cekus, D.
    Zając, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/122354.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    line-follower
    mobile robot
    controller P
    controller PI
    controller PID
    robot mobilny
    kontroler P
    kontroler PI
    kontroler PID
    Opis:
    The paper presents a method for control of a mobile robot. The task of the Line-follower was to cover the route set programmatically as accurately as possible using the controllers P, PI or PID without the use of sensors to detect the line. The work also consists of a description of the mobile robot development and the results of the experimental research with discussion.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 1; 69-78
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PI control of laboratory furnace for annealing of amorphous alloys cores
    Autorzy:
    Kurek, J. E.
    Szewczyk, R.
    Salach, J.
    Kloda, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/384934.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    PI controller
    resistive furnace
    temperature control
    Opis:
    There are presented theoretical and practical aspects of automatic control of resistive furnace for thermal annealing of magnetic cores made of amorphous alloys. Process of annealing requires specific conditions both from the point of view of temperature and its changes. Solutions presented in the paper create possibility for low value of error as well as fast achievement of set value.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 4; 13-15
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An efficiency no adaptive backstepping speed controller based direct torque control
    Autorzy:
    Ghezouani, A.
    Gasbaoui, B.
    Ghouili, J.
    Benayed, A. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/384812.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    backstepping
    induction motor
    DTC
    PI controller
    fuzzy controller
    Opis:
    The most problem of direct torque control are high torque ripple and Settling time to overcome this problem an efficiency Backstopping speed controller are proposed. This paper makes a comparison of the effectiveness of three PI speed controller based direct torque control, the first one is the classical PI speed controller (CL-PISC), the second are no Adaptive Backstepping controller (NABACKSC), and the third type are adaptive fuzzy PI controller (AF-PISC). The parameters of adaptive fuzzy PI are dynamically adjusted with the assistance of fuzzy logic controller. The non-Adaptive Backstopping controller is designed based on the Lyapunov stability theorem. The direct torque control is very adapted for electric propulsion systems; we apply this new strategy for an 15 Kw induction motor. The proposed PI controllers are simulated in MATLAB SIMULINK environment. The simulation results confirmed that the NA-BACKSC, present robust and the best dynamic behavior on direct torque control compared to AF-PISC and CL-PISC.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2017, 11, 1; 57-63
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation Strategy for Dual Wheel Mobile Robot Control
    Autorzy:
    Soomro, Z. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/384911.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    mobile robot
    P controller
    PI controller
    Simulink simulation
    Opis:
    This paper deals with modeling and control strategies of the motion of wheeled mobile robots. The model of the vehicle has two driving wheels and the angular velocities of the two wheels are independently controlled. To illustrate how the kinematics model of the system can be used to design P controller and a PI controller is applied. The nonlinear and linearlised models are simulated in MATLAB® and simulink. The results are drawn here to evaluate the performance of the proposed controllers with concerned graphics.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2014, 8, 4; 20-23
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A computer system for controlling temperature in a two-state mode and by means of a PI controller in an “intelligent building”
    Autorzy:
    Jarmuda, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/97497.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    intelligent building
    PI controller
    intelligent electrical installation
    Opis:
    The article presents the application capabilities of the LOGO! controller produced by the Siemens company with respect to heating control in an automated “intelligent building”. The wide range of capabilities of the logic controller finds its reflection in practical implementation, as illustrated by means of a computer simulation example prepared in the LOGO! Soft Comfort v6.0 program. The work presents a comparative analysis of two programs serving two-stage heating control: with and without hysteresis, as well as a control program for an “intelligent” holiday cottage. The article also presents the results of parameter calculations for the B007 analog adapter, based on the examples of sample heating curve characteristics. The wide range of capabilities of the logic controller finds its practical implementation on the basis of examples of PI controller operation simulations in the LOGO! Soft Comfort v6.0 program.
    Źródło:
    Computer Applications in Electrical Engineering; 2012, 10; 372-385
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust control system design in frequency domain
    Autorzy:
    Veselý, V
    Osuský, J
    Powiązania:
    https://bibliotekanauki.pl/articles/964036.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hybrid control
    equivalent subsystem method
    PI controller
    Opis:
    In this paper two robust control methods for hybrid system are presented. Both methods are usefull for SISO and MIMO systems. Controller design procedure is developed in frequency domain. Equivalent subsystem method is used for controller design in this paper. Stability condition of proposed methods bases on small gain theory and uses additive and inverse additive model type. Two tank water system is presented in the paper and serves as a numerical example to compare effectiveness of described methods.
    Źródło:
    Archives of Control Sciences; 2013, 23, 1; 61-78
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laboratory Tests of a Speed Control System for Roadheader Cutting Heads
    Autorzy:
    Joostberens, J.
    Heyduk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2064888.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    speed control
    roadheader
    cutting optimization
    PI controller
    power efficiency
    Opis:
    The paper presents selected results of the laboratory tests of the speed control system for the R-130 roadheader with an inverter-fed cutting heads drive. The results recorded for the variable speed system have been compared with the measurement obtained for the network supplied drive. There have been noticed some oscillations after rapid current overloads. They are due to the operation of the internal current controller of the PWM-inverter, The oscillations are fast decaying - so they prove the results of initial system stability checking. Generally, the automatic speed control, tracking the optimum speed level calculating by supervisory speed adjuster makes possible to better utilize the motor power throughout the whole cutting time. The better operating conditions of the motor cause increase in the whole system power efficiency (even in spite of additional losses in the inverter circuit) Additionally the sped control reduces dynamical overloads. This fact can have a positive influence on the whole system reliability. The speed control subsystem is a part of the whole control system which contains also close-loop boom angular position and velocity control circuits.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 153--159
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza efektów wzbogacania węgla kamiennego w osadzarce z wykorzystaniem zmodyfikowanego algorytmu sterowania
    Analysis of Hard Coal Enrichment Effects in Jig Using Modified Control Algorithm
    Autorzy:
    Pielucha, Wojciech
    Pielot, Joachim
    Powiązania:
    https://bibliotekanauki.pl/articles/319131.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    osadzarka
    cyfrowy regulator PI
    zjawisko windup
    jig
    digital PI controller
    windup phenomenon
    Opis:
    Przedstawione zostały zagadnienia wzbogacania węgla kamiennego w osadzarkach. Omówiono dwa układy technologiczne: z jedną osadzarką oraz układ z wzbogacaniem wtórnym przy wykorzystaniu dwóch osadzarek o tych samych parametrach. Opisano zjawisko windup, występujące w cyfrowych algorytmach PI oraz przedstawiono negatywne efekty, które ono powoduje. W celu ich ograniczenia, dokonano modyfikacji podstawowego algorytmu poprzez rozbudowanie go o układ kompensacji zjawiska windup. Przeprowadzono następnie badania symulacyjne układu bez modyfikacji oraz zmodyfikowanego algorytmu. Dokonano analizy porównawczej efektów wzbogacania z wykorzystaniem wspomnianych algorytmów dla wybranych układów technologicznych. Jako kryteria oceny przyjęto wartości parametrów dynamicznych procesu wzbogacania oraz wartości parametrów jakościowych produktu wyjściowego.
    The issues of hard coal enrichment in jigs were introduced. Two technological systems were discussed: one with a set-up and a secondary enrichment system with the use of two jigging units with the same parameters. The windup phenomenon, occurring in digital PI algorithms and its negative effects were described. In order to limit them, a basic algorithm was modified by extending it to the windup compensation system. Then, simulation testing of the system without modification and modified algorithm was performed. A comparative analysis of the enrichment effects was performed using these algorithms for selected technological systems. Values of the dynamic parameters of the enrichment process and values of the quality parameters of the output product were used as the evaluation criteria.
    Źródło:
    Inżynieria Mineralna; 2019, 21, 1/2; 87-92
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    RT-LAB platform for real-time implementation of luenberger observer based speed sensorless control of induction motor
    Autorzy:
    Bechar, Mansour
    Hazzab, Abdeldjebar
    Habbab, Mohamed
    Sicard, Pierre
    Slimi, Mohammed
    Powiązania:
    https://bibliotekanauki.pl/articles/384383.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    digital simulator (OP5600)
    induction motor
    Luenberger observer
    RT-LAB platform
    speed sensorless control
    PI controller
    PI anti-windup controller
    Opis:
    This paper proposes RT-LAB platform for realtime implementation of Luenberger observer based on speed sensorless scalar control of induction motor. The observed shaft speed is derived from lyapunov’s theory. It is shown by an extensive study that this Luenberger observer with PI anti-windup speed controller is completely satisfactory at (nominal, variable, reverse) speed references and it is also robust to load torque disturbance. The sensorless control algorithm along with the proposed Luenberger observer is modeled, built in the Host PC and successfully implemented in real-time using digital simulator OP5600. The experimental results observed in the GW-Instek digital oscilloscope’s screen validate the effectiveness of the proposed Luenberger observer for speed sensorless scheme.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2019, 13, 4; 65-72
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sterowanie piecem rezystancyjnym do wyżarzania rdzeni ze stopów amorficznych
    Control of Resistive Furnace for Annealing of Amorphous Alloys
    Autorzy:
    Kurek, J.
    Szewczyk, R.
    Salach, J.
    Kłoda, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/276860.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    regulator PI
    piec rezystancyjny
    układ regulacji temperatury
    PI controller
    resistive furnace
    temperature control
    Opis:
    W referacie przedstawiono teoretyczne i praktyczne aspekty sterowania piecem rezystancyjnym przeznaczonym do wyżarzania rdzeni magnetycznych ze stopów amorficznych w warunkach laboratoryjnych. Proces wyżarzania rdzeni wymaga zapewnienia specyficznych warunków zarówno z punktu widzenia wartości temperatury, jak i z punktu widzenia szybkości jej zmian. Przedstawione w referacie rozwiązania w zakresie regulacji umożliwiają uzyskanie niewielkiej odchyłki regulacji wartości temperatury w trakcie wyżarzania oraz szybkie dochodzenie do wartości zadanej.
    Paper presents theoretical and practical aspects of automated control of resistive furnace for thermal annealing of magnetic cores made of amorphous alloys. Process of annealing requires specific conditions both from the point of view of temperature and its changes. Solutions presented in the paper creates possibility of both low value of error as well as fast achievement of set value.
    Źródło:
    Pomiary Automatyka Robotyka; 2012, 16, 2; 128-131
    1427-9126
    Pojawia się w:
    Pomiary Automatyka Robotyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dobór parametrów regulatora PI w układzie sterowania odbiorem produktu dolnego w osadzarce – wybrane problemy
    Tuning of the PI controller in discharge of products control system in jig - selected aspects
    Autorzy:
    Pielucha, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/113201.pdf
    Data publikacji:
    2017
    Wydawca:
    STE GROUP
    Tematy:
    wzbogacanie węgla
    osadzarka
    regulator PI
    zjawisko windup
    coal enrichment
    jig
    PI controller
    windup phenomenon
    Opis:
    W pracy krótko scharakteryzowano strefę odbioru osadzarki jako obiekt regulacji. Opisano przyjęty w celach badawczych przyrostowy algorytm cyfrowego regulatora PI. Omówiono też problemy związane z doborem nastaw cyfrowego regulatora PI. Następnie, w celach symulacyjnych, dobrano nastawy regulatora na podstawie zidentyfikowanych parametrów zastępczego liniowego modelu obiektu. W dalszej części referatu rozpatrzono dwa przypadki zmian zadanej gęstości rozdziału. W celu dokonania analizy porównawczej, zastosowano algorytm pozycyjny z kompensatorem zjawiska windup. Wyniki badań symulacyjnych przedstawiono w postaci wykresów przebiegów czasowych wartości regulowanej. Na koniec porównano efekty regulacji dla obu przyjętych algorytmów.
    The study briefly characterized the jig distribution zone as an control object. Accepted for research purposes, incremental algorithm of the digital PI controller has been described. Also, issues related to setting the digital PI controller have been discussed. Then, for the purpose of simulation, controller settings based on the identified parameters of linear model has been chosen. In the rest of the paper two cases of changes to the separation density were examined. In order to make a comparative analysis, positional algorithm with the antiwindup compensator has been used. The results of simulation studies were presented in graphical timelines of the control variable. At the end, the effects of control for both algorithms were compared.
    Źródło:
    Systemy Wspomagania w Inżynierii Produkcji; 2017, 6, 2; 273-282
    2391-9361
    Pojawia się w:
    Systemy Wspomagania w Inżynierii Produkcji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adjusting output impedance using a PI controller to improve the stability of a single-phase inverter under weak grid
    Autorzy:
    Jiao, J.
    Nelms, R. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/136224.pdf
    Data publikacji:
    2016
    Wydawca:
    EEEIC International Barbara Leonowicz Szabłowska
    Tematy:
    grid impedance
    inverter output impedance
    LC filter
    PI controller
    single-phase inverter
    Opis:
    Explored in this paper is the grid impedance effect on the stability of a single-phase grid connected inverter with an LC filter based on an analysis of the inverter output impedance. For a single-phase grid connected inverter, a PI controller is often used to regulate the current injected into the grid. However, the control performance can be influenced when the inverter is connected to a weak grid. Also, the utility grid has background harmonic noise, which can make the injected current distorted. Therefore, analysis of the output impedance of a single-phase grid connected inverter is important for the robustness and stability of the system. By modeling the output impedance of inverter, it can be determined that the proportional gain and integral gain of the controller have an effect on the output impedance. Analytical results show that by adjusting the PI controller parameters, the ability for harmonic reduction and stability of the system can be improved. Simulation and experiments using a 1 kW single-phase grid connected inverter verify the effectiveness of the theoretical analysis.
    Źródło:
    Transactions on Environment and Electrical Engineering; 2016, 1, 4; 50-57
    2450-5730
    Pojawia się w:
    Transactions on Environment and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Decentralized PI controller for multimotors web winding system
    Autorzy:
    Bouchiba, B.
    Hazzab, A.
    Glaoui, H.
    Med-Karim, F.
    Bousserhane, I. K.
    Sicard, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/384405.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    multi motors web winding system
    PI controller
    tension control
    linear speed control
    Opis:
    Web winding systems allow the operations of unwinding and rewinding of various products including plastic films, sheets of paper, sheets, and fabrics. These operations are necessary for the development and the treatment of these products. Web winding systems generally consist of the same machine elements in spite of the diversity of the transported products. Due to the wide rang variation of the radius and inertia of the rollers the system dynamic change considerably during the winding/ unwinding process. Decentralized PI controller for web tension control and linear speed control are presented in this paper. The PI control method can be applied easily and is widely known, it has an important place in control applications. Simulation results show the effectiveness of the proposed linear speed and tension controller for web winding multi motors systems.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 2; 32-36
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of robust multi-loop PI controller for improved disturbance rejection with constraint on minimum singular value
    Autorzy:
    Arun, Pathiran
    Muniraj, Rathinam
    Boselin Prabhu, S.R.
    Jarin, T.
    Willjuice Iruthayarajan, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/27324013.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    multi-loop PI controller
    multivariable system
    decentralized control
    disturbance rejection
    robust stability
    Opis:
    Disturbance rejection performance optimization with constraints on robustness for a multivariable process is commonly encountered in industrial control applications. This paper presents the tuning of a multi-loop Proportional Integral (PI) controller method to enhance the performance of load disturbance rejection using evolutionary optimization. The proposed design methodology is formulated to minimize the load disturbance rejection response and the input control energy under the constraints of robust stability. The minimum singular value of multiplicative uncertainty is considered a multi-loop system robust stability indicator. Optimization is performed to achieve the same, or higher level than the most-explored Direct Synthesis (DS) based multi-loop PI controller, which is derived from a conventional criterion. Simulation analysis clearly proved that the proposed multi-loop PI controller tuning method gives better disturbance rejection, and either, the same or a higher level of robust stability when compared to the DS-based multi-loop PI controller.
    Źródło:
    Archives of Control Sciences; 2023, 33, 4; 839--859
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of a non-integer order PI controller with an active queue management mechanism
    Autorzy:
    Domański, A.
    Domańska, J.
    Czachórski, T.
    Klamka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/331094.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    active queue management
    PI controller
    dropping packets
    fractional calculus
    aktywne zarządzanie kolejkami
    regulator PI
    pochodna ułamkowa
    Opis:
    In this paper the performance of a fractional order PI controller is compared with that of RED, a well-known active queue management (AQM) mechanism. The article uses fluid flow approximation and discrete-event simulation to investigate the influence of the AQM policy on the packet loss probability, the queue length and its variability. The impact of self-similar traffic is also considered.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 777-789
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Proportional-Integral Controllers of Grid-Connected Wind Energy Conversion System Using Grey Wolf Optimizer Based on Artificial Neural Network for Power Quality Improvement
    Autorzy:
    Alremali, Fathi Abdulmajeed M.
    Yaylacı, Ersagun Kürşat
    Uluer, İhsan
    Powiązania:
    https://bibliotekanauki.pl/articles/2201727.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    artificial neural network
    grey wolf optimizer
    PI controller
    grid connection
    power quality
    wind energy
    Opis:
    This research presents a combination of artificial neural network (ANN) with the grey wolf optimizer (GWO) to improve the power quality of a grid-connected distributed power generation system (DPGS). To assess the effectiveness of the proposed algorithm, a grid-tied of small-scale wind energy conversion system (WECS) is chosen. The term power quality refers to voltage and frequency regulation, and limited harmonics. Power quality improvement is achieved through the cascaded control system's optimal tuning of three proportional-integral (PI) controllers of the grid-side inverter (GSI). However, because the DPGS model is computationally costly, the Artificial Neural Network (ANN) model is utilized as an alternative model for DPGS. Furthermore, the ANN model is employed in conjunction with the GWO to boost the optimization precision and minimize the execution time of GWO. The considered power system was repetitively simulated to obtain the input-output datasets, which validate and train the ANN model. According to the ANN model's performance evaluation, the correlation coefficient (R) is close to one, while the mean squared error (MSE) is near zero. These findings demonstrate the ANN model's great accuracy in approximating the DPGS model. Using MATLAB/Simulink, the system's performance is evaluated using the optimum values obtained using GWO-ANN for various wind speed profiles. It showed the suggested power quality method’s improved stability, convergence behavior, the effectiveness of the control mechanism, and the robustness of the proposed topology.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 3; 295--305
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control imrovement of shunt active power filter using an optimized-PI controller based on ant colony algorithm and swarm optimization
    Autorzy:
    Berbaoui, B.
    Ferdi, B.
    Benachaiba, C.
    Dehini, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/385137.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    ant colony optimization
    particle swarm optimization (PSO)
    shunt active power filter
    armonic compensation
    PI controller
    Opis:
    In the last years, there has been a increase currents harmonics on electrical network injected by nonlinear loads, such as rectifier equipment used in telecommunication system, power suppliers, domestic appliances, ect. This paper makes a comparison of the effectiveness of the two methods on particular optimization problem, namely. The tuning of the parameters for PI DC link voltage to a shunt active power filter. The simulation results demonstrates that the optimized PI controller by ant colony (ACO) presents a advantage of little response time and best control performances compared to the optimized PI with Particle swarm (PSO). This comparison is shown on redu cing harmonic current supply (THD).
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 4; 19-25
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problem LQ w optymalizacji regulatora momentu elektromagnetycznego
    LQ problem in electromagnetic torque controller optimization
    Autorzy:
    Sieklucki, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/320322.pdf
    Data publikacji:
    2010
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    problem LQ
    optymalizacja parametryczna
    regulacja momentu elektrycznego
    regulator PI
    regulator PD
    DTC-SVM
    LQ problem
    parametric optimization
    motor torque control
    PI controller
    PD controller
    Opis:
    W artykule przedstawiono optymalizację parametryczną regulatora PI w przestrzeni stanu. W procesie optymalizacji wykorzystano konwersję transmitancyjnego matematycznego modelu do równania stanu i problem liniowo-kwadratowy (LQ). Omówiono reprezentację układu regulacji jako systemu jednopętlowego. Przedstawiono optymalizację dla napędu z silnikiem obcowzbudnym oraz dla napędu z silnikiem indukcyjnym (metoda DTC-SVM).
    In this paper the PI controller parametric optimization in state-space is presented. The conversion from transfer-function to statespace mathematical model and linear-quadratic (LQ) control problem is used in optimization process. Representation of the control system as one-loop system is discussed. Optimization for drive with separately excited DC motor and drive with induction motor (DTC-SVM method) is presented.
    Źródło:
    Elektrotechnika i Elektronika; 2010, 29, 1--2; 26-32
    1640-7202
    Pojawia się w:
    Elektrotechnika i Elektronika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative study of pi and fuzzy logic based speed controllers of an ev with four in-wheel induction motors drive
    Autorzy:
    Ghezouani, A.
    Gasbaoui, B.
    Nair, N.
    Abdelkhalek, O.
    Ghouili, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/384433.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    electric vehicle
    induction motor
    PI controller
    fuzzy logic controller
    FLC
    direct torque control
    DTC
    four in-wheel induction motors
    Opis:
    This paper presents the modeling, control and simulation of an electric vehicle with four in-wheel 15 kw induction motors drive 4WDEV controlled by a direct torque control DTC strategy, where two control techniques are presented and compared for controlling the electric vehicle speed: the first one is based on a classical PI controller while the second one is based on a fuzzy logic controller (FLC). The aim is to evaluate the impact of the proposed FLC controller on the efficiency of the 4WDEV taking into account vehicle dynamics performances, autonomy and battery power consumption. When the classical controller can’t ensure the electric vehicle stability in several road topology situations. To show the efficiency of the proposed new control technique on the traction system by 4WDEV. The vehicle has been tested in different road constraints: straight road, sloping road and curved road to the right and left using the Matlab / Simulink environment. The analysis and comparison of the simulation results of FLC and PI controllers clearly show that the FLC ensures better performances and gives a good response without overshoot, zero steady state error and high load robustness rejection, compared to the PI controller which is present an overshoot equal 7.3980% and a rise time quite important (0.2157 s with PI controller and 0.1153 s with FLC). As well as the vehicle range has been increased by about 10.82 m throughout the driving cycle and that the energy consumption of the battery has been reduced by about 1.17% with FLC.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 3; 43-54
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The IoT gateway with active queue management
    Autorzy:
    Domański, Adam
    Domańska, Joanna
    Czachórski, Tadeusz
    Klamka, Jerzy
    Szyguła, Jakub
    Marek, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1838178.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    active queue management
    PI controller
    dropping packets
    fractional calculus
    IoT gateway
    aktywne zarządzanie kolejkami
    regulator PI
    pochodna ułamkowa
    Internet Rzeczy
    Opis:
    As the traffic volume from various Internet of things (IoT) networks increases significantly, the need for adapting the quality of service (QoS) mechanisms to the new Internet conditions becomes essential. We propose a QoS mechanism for the IoT gateway based on packet classification and active queue management (AQM). End devices label packets with a special packet field (type of service (ToS) for IPv4 or traffic class (TC) for IPv6) and thus classify them as priority for real-time IoT traffic and non-priority for standard IP traffic. Our AQM mechanism drops only non-priority packets and thus ensures that real-time traffic packets for critical IoT systems are not removed if the priority traffic does not exceed the maximum queue capacity. This AQM mechanism is based on the PIα controller with non-integer integration order. We use fluid flow approximation and discrete event simulation to determine the influence of the AQM policy on the packet loss probability, queue length and its variability. The impact of the long-range dependent (LRD) traffic is also considered. The obtained results show the properties of the proposed mechanism and the merits of the PIα controller.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 165-178
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    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:
    Fuzzy controller of model reduction distillation column with minimal rules
    Autorzy:
    Alawad, Nasir
    Alseady, Afaf
    Powiązania:
    https://bibliotekanauki.pl/articles/118163.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    distillation column
    model reduction
    pi controller
    fuzzy inference system
    MATLAB tool
    kolumna destylacyjna
    redukcja modelu
    kontroler pi
    system wnioskowania rozmytego
    narzędzie MATLAB
    Opis:
    In this paper the control of a binary distillation column is described. This control is done with fuzzy logic, one with PI- like fuzzy controller and the other with modified PI fuzzy controller, using the minimal rules for fuzzy processing. This work is focused on model reduction of Wood and Berry binary distillation column to get the best performance. It is desired to minimize the rules in order to reduce the computation time to make a faster decision. Comparisons will be made between two versions of fuzzy controllers utilizing reduced rules to verify the outputs. The controlled variables are top composition with high concentration and bottom composition with low. To demonstrate the performance of the fuzzy PI control schemes, results are compared with a classical PI controller and optimal methods, like Differential Evolution (DE), Invasive Weed Optimization (IWO). The proposed structure is able to quickly track the parameter variation and perform better in load disturbances and also for set point changes. Then all the processes of the distillation column with itۥ s fuzzy controllers are simulated in MATLAB software as the results are shown.
    Źródło:
    Applied Computer Science; 2020, 16, 2; 80-94
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of multiple-area renewable integrated hydro-thermal system considering artificial rabbit optimized PI (FOPD) cascade controller and redox flow battery
    Autorzy:
    Saha, Arindita
    Chiranjeevi, Tirumalasetty
    Devarapalli, Ramesh
    Babu, Naladi Ram
    Dash, Puja
    Garcìa Màrquez, Fausto Pedro
    Powiązania:
    https://bibliotekanauki.pl/articles/27324511.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    solar thermal
    automatic generation control
    geothermal
    artificial rabbit optimization
    redox flow battery
    PI(FOPD) controller
    Opis:
    The current task explores automatic generation control knowledge under old-style circumstances for a triple-arena scheme. Sources in area-1 are thermal-solar thermal (ST); thermalgeothermal power plant (GPP) in area-2 and thermal-hydro in area-3. An original endeavour has been set out to execute a new performance index named hybrid peak area integral squared error (HPA-ISE) and two-stage controller with amalgamation of proportional-integral and fractional order proportional-derivative, hence named as PI(FOPD). The performance of PI(FOPD) has been compared with varied controllers like proportional-integral (PI), proportional-integralderivative (PID). Various investigation express excellency of PI(FOPD) controller over other controller from outlook regarding lessened level of peak anomalies and time duration for settling. Thus, PI(FOPD) controller’s excellent performance is stated when comparison is undergone for a three-area basic thermal system. The above said controller’s gains and related parameters are developed by the aid of Artificial Rabbit Optimization (ARO). Also, studies with HPA-ISE enhances system dynamics over ISE. Moreover, a study on various area capacity ratios (ACR) suggests that high ACR shows better dynamics. The basic thermal system is united with renewable sources ST in area-1 also GPP in area-2. Also, hydro unit is installed in area-3. The performance of this new combination of system is compared with the basic thermal system using PI(FOPD) controller. It is detected that dynamic presentation of new system is improved. Action in existence of redox flow battery is also examined which provides with noteworthy outcome. PI(FOPD) parameters values at nominal condition are appropriate for higher value of disturbance without need for optimization.
    Źródło:
    Archives of Control Sciences; 2023, 33, 4; 861--884
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Novel Intelligent Neural Network Techniques of UPQC with Integrated Solar PV System for Power Quality Enhancement
    Autorzy:
    Rudraram, Ramesh
    Chinnathambi, Sasi
    Mani, Manikandan
    Powiązania:
    https://bibliotekanauki.pl/articles/27311926.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    PV system
    Re-lift Luo DC-DC converter
    Cascaded ANN MPPT
    Adaptive PI controller
    CNN assisted dq theory
    Opis:
    A Novel Intelligent control of a Unified Power Quality Conditioner (UPQC) coupled with Photovoltaic (PV) system is proposed in this work. The utilization of a Re-lift Luo converter in conjunction with a Cascaded Artificial Neural Network (ANN) Maximum Power Point Tracking (MPPT) method facilitates the optimization of power extraction from PV sources. UPQC is made up of a series and shunt Active Power Filter (APF), where the former compensates source side voltage quality issues and the latter compensates the load side current quality issues. The PV along with a series and shunt APFs of the UPQC are linked to a common dc-bus and for regulating a dc-bus voltage a fuzzy tuned Adaptive PI controller is employed. Moreover, a harmonics free reference current is generated with the aid of CNN assisted dq theory in case of the shunt APF. The results obtained from MATLAB simulation.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 3; 605--613
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wieloobszarowy układ regulacji PI do sterowania prędkością obrotową samochodu z silnikiem spalinowym
    Multiregional PI control system of the rotational speed of a car with an internal combustion engine
    Autorzy:
    Strojny, R.
    Piotrowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/276445.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    modelowanie matematyczne
    systemy dynamiczne
    układ napędowy
    wieloobszarowy regulator PI
    nieliniowy system sterowania
    mathematical modeling
    dynamic systems
    propulsion system
    multiregional PI controller
    nonlinear control system
    Opis:
    Sterowanie pojazdami stanowi istotny obszar działalności koncernów samochodowych. W pracy przedstawiono nieliniowy model matematyczny układu napędowego samochodu osobowego z silnikiem spalinowym. Następnie zaproponowano strukturę systemu sterowania i zaprojektowano nieliniowy wieloobszarowy układ regulacji PI. Przeprowadzono testy symulacyjne zaproponowanego rozwiązania i dokonano krytycznej analizy uzyskanych wyników.
    Control of vehicles has a key role in the activities of car companies. The paper presents a nonlinear mathematical model of the propulsion system of a passenger car with a petrol engine. Next, new control structure and the nonlinear multiregional PI control system of the rotational speed are designed. Finally, the results of simulation and a critical analysis are presented.
    Źródło:
    Pomiary Automatyka Robotyka; 2013, 17, 6; 90-95
    1427-9126
    Pojawia się w:
    Pomiary Automatyka Robotyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical and simulation modeling of dual active bridge
    Autorzy:
    Barlik, Roman
    Grzejszczak, Piotr
    Koszel, Mikołaj
    Powiązania:
    https://bibliotekanauki.pl/articles/2173709.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dual active bridge
    small-signal analysis
    averaged model
    transfer function
    parasitics
    PI controller
    podwójny mostek aktywny
    analiza małosygnałowa
    model uśredniony
    funkcja przenoszenia
    pasożyty
    regulator PI
    Opis:
    The paper is a structured, in-depth analysis of dual active bridge modeling. In the research new, profound dual active bridge converter (DAB) circuit model is presented. Contrary to already described idealized models, all critical elements including numerous parasitic components were described. The novelty is the consideration of a threshold voltage of diodes and transistors in the converter equations. Furthermore, a lossy model of leakage inductance in an AC circuit is also included. Based on the circuit equations, a small-signal dual active bridge converter model is described. That led to developing control of the input and output transfer function of the dual active bridge converter model. The comparison of the idealized model, circuit simulation (PLECS), and an experimental model was conducted methodically and confirmed the high compatibility of the introduced mathematical model with the experimental one. Proposed transfer functions can be used when designing control of systems containing multiple converters accelerating the design process, and accurately reproducing the existing systems, which was also reported in the paper.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 5; art. no. e142653
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identifying the optimal controller strategy for DC motors
    Autorzy:
    Qader, M. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/140815.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    DC Motor
    LQR
    PID
    PI
    controller strategy
    Opis:
    The aim of this study is to design a control strategy for the angular rate (speed) of a DC motor by varying the terminal voltage. This paper describes various designs for the control of direct current (DC) motors. We derive a transfer function for the system and connect it to a controller as feedback, taking the applied voltage as the system input and the angular velocity as the output. Different strategies combining proportional, integral, and derivative controllers along with phase lag compensators and lead integral compensators are investigated alongside the linear quadratic regulator. For each controller transfer function, the step response, root locus, and Bode plot are analysed to ascertain the behaviour of the system, and the results are compared to identify the optimal strategy. It is found that the linear quadratic controller provides the best overall performance in terms of steady-state error, response time, and system stability. The purpose of the study that took place was to design the most appropriate controller for the steadiness of DC motors. Throughout this study, analytical means like tuning methods, loop control, and stability criteria were adopted. The reason for this was to suffice the preconditions and obligations. Furthermore, for the sake of verifying the legitimacy of the controller results, modelling by MATLAB and Simulink was practiced on every controller.
    Źródło:
    Archives of Electrical Engineering; 2019, 68, 1; 101-114
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reparation of voltage disturbance using PR controller-based DVR in Modern power systems
    Autorzy:
    Danalakshmi, D.
    Prathiba, Srividya
    Ettappan, M.
    Krishna, Mohan D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839555.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    smart grid
    jakość energii elektrycznej
    regulator PI i PR
    ewolucja
    DVR
    współczynnik zawartości harmonicznych
    power quality
    PI and PR controller
    self balanced differential
    evolution
    dynamic voltage restorer
    total harmonic distortion
    Opis:
    The Smart Grid environment gives more benefits for the consumers, whereas the power quality is one of the challenging factors in the smart grid environment. To protect the system equipment and increase the reliability, different filter technologies are used. Even though, consumers’ expectations towards the power quality are not fulfilled. To overcome these drawbacks and enhance the system reliability, a new Custom Power Devices (CPD) are introduced in the system. Among different CPDs, the Dynamic Voltage Restorer (DVR) is one of the voltage compensating devices that is used to improve the power quality during distortions. When the distortions such as voltage swell and sag occur in the distribution system, the control strategy in the DVR plays a significant role. In this article, the DVR performance using Proportional Integral (PI), Proportional Resonant (PR) controllers are analyzed. A robust optimization algorithm called Self Balanced Differential Evolution (SBDE) is used to find the optimal gain values of the controllers in order to reach the target of global minimum error and obtain fast response. Then, a comparative analysis is performed between different controllers and verified that the performance of PR controller is superior than the other controllers. It has been found that the proposed PR controller strategy reduces the Total Harmonic Distortion (THD) values for all types of faults. The proposed SBDE optimized DVR with PR controller reduces the THD value less than 4% under voltage distoration condition. The DVR topology is validated in MATLAB/SIMULINK in order to detect the disturbance and inject the voltage to compensate the load voltage.
    Źródło:
    Production Engineering Archives; 2021, 27, 1; 16-29
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kontroler CPLD dla magistrali zewnętrznej mikrokomputera Raspberry PI
    A CPLD controller for the external bus of a Raspbery PI microcomputer
    Autorzy:
    Arnold, K.
    Michalak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/152312.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    Raspberry Pi
    podsystem transmisji równoległej
    kontroler magistrali
    układy CPLD
    PPI subsystem
    bus controller
    CPLD
    Opis:
    W pracy przedstawiono możliwości zwiększania liczby wejść i wyjść równoległych popularnego modułu Raspberry PI z wykorzystaniem programowalnych układów peryferyjnych (PPI). Wskazano na ograniczenia w zakresie rozszerzania portów równoległych, związane z liczbą dostępnych linii I/O Raspberry PI. Zaproponowano rozwiązanie wykorzystujące zewnętrzny kontroler implementowany w strukturze CPLD, odpowiedzialny za adresowanie układów PPI, przyjmowanie zgłoszeń przerwań i wystawienie na magistralę wektora przerwań.
    In this paper the possibility of increasing parallel inputs and outputs in a microprocessor system based on an educational microcomputer Raspberry PI (Fig. 1) and a programmable peripheral interface (PPI) is presented. An example of multi-channel communication between the central processor unit, PPI devices and parallel interface modes for 82C55A PPI is described (Fig. 2). A system composed of a Raspberry PI unit, a hardware CPLD controller and four parallel transmission devices is proposed (Fig. 3). The external address/interrupt controller is responsible for external PPI addressing – the word address is written with a confirmation signal /LOAD (Fig. 5), and for registering interrupts. The controller takes over the tasks of decoding and interrupts receiving, so consequently minimizes the time required by the Raspberry PI for interruption of the current program, servicing of the peripheral units, and resumption of the interrupted program. The data bus can be implemented inside the CPLD, but also it is possible to use one of any external level translators with three-state output mode (OE signal). This controller was implemented in one of XC9500XL family devices (Tab. 1). For each device from this family the I/Os are fully 5V (CMOS, TTL) tolerant even though the core power supply of the Raspberry PI is 3.3 volts. In mixed (5V/3.3V/2.5V) systems, a controller can work with low power supply CPU. Use of this one programmable device gives us a chance for creating a flexible controller, which can work with different kind of 8-bit central units.
    Źródło:
    Pomiary Automatyka Kontrola; 2013, R. 59, nr 8, 8; 766-768
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implementacja kontrolera SPI/PPI w układzie CPLD dla zastosowań z mikrokomputerem Raspberry PI
    Implementation of the SPI/PPI controller in a CPLD structure for the systems with a Raspberry PI microcomputer
    Autorzy:
    Arnold, K.
    Michalak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/972186.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    Raspberry Pi
    podsystem transmisji równoległej
    kontroler magistrali
    układy CPLD
    PPI subsystem
    bus controller
    CPLD
    Opis:
    W pracy wskazano potrzebę rozszerzania portów równoległych w systemach z komputerem Raspberry PI. Przedstawiono możliwości programowalnych układów peryferyjnych (PPI). Zaproponowano rozwiązanie problemu komunikacji komputera Raspberry z układami peryferyjnymi, polegające na wprowadzeniu kontrolera układów PPI, wyposażonego w interfejs SPI. Przedstawiono koncepcję integracji modułu SPI, dekodera adresów układów PPI i enkodera przerwań w strukturze CPLD. Zaprezentowano wyniki implementacji logiki kontrolera w układzie CPLD.
    In this paper the necessity of increasing parallel I/O lines in a microprocessor system based on the Raspberry PI, a very popular small educational microcomputer, is described. The possibility of increasing parallel inputs and outputs with a programmable peripheral interface (PPI), and also hardware architecture of 82C55A is presented (Fig. 1). The cooperation rules between the central unit and PPI devices are given. The general block diagrams of the system with the Raspberry PI and the implemented PPI controller, with parallel and serial (SPI) interface, are shown and discussed (Fig. 2). An effective solution of communication between Raspberry PI and 82C55A PPI devices, using an external programmable controller with a simplified SPI, is suggested. The SPI/PPI controller takes over the duties of controlling the modes of 82C55A PPI devices, relieves the central unit and decreases the usage of I/O lines. The instruction sequences are composed of two bytes, the higher one includes codes for creating control signals for the controller and read/write cycles for 82C55A devices, the lower includes the data. The address and data words are written with the confirmation signal /STR (Fig. 3). The controller is responsible for PPI addressing and also takes over the tasks of decoding and receiving interrupts. This version of a controller was implemented in the XC9572XL (Xilinx) device, so we had additionally I/Os fully 5V (CMOS, TTL) tolerant, even though the core power supply of the Raspberry PI and its I/O lines were 3.3 volts. The Behavioral and Post-Fit Simulations results are shown (Figs. 4,5 and 6).
    Źródło:
    Pomiary Automatyka Kontrola; 2014, R. 60, nr 7, 7; 462-464
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie wyników badań symulacyjnych układu regulacji z regulatorem klasycznym i regulatorem rzędu ½ z wynikami uzyskanymi praktycznie
    Comparison of simulation results of the control system with a classical controller and a controller of order ½ with results obtained in practice
    Autorzy:
    Gertner, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/157496.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    regulator rzędu ½
    operatory niecałkowitego rzędu
    klasyczne regulatory PI, PD oraz PID
    obiekt fraktalny
    controller of order ½
    differintegral operator
    classical PI,PD and PID controllers
    fractal object
    Opis:
    W artykule opisano ogólną postać operatora niecałkowitego rzędu. Przedstawiono opis regulatora proporcjonalno-całkującego i proporcjonalno-różniczkującego rzędu ½. Wyznaczono odpowiedzi na wartość zadaną układu z klasycznym regulatorem PI, PD, PID oraz z regulatorem proporcjonalno-całkującym, proporcjonalno-różniczkującym i proporcjonalno-całkująco-różniczkującym rzędu ½. Porównano wyniki badań symulacyjnych z badaniami opisanymi w pracy [6].
    In the paper the design of a fractional order controller of the closed loop system with inertial plant with time delay is considered (Fig. 1). The definition of a fractional order differ-integral is given by (1). In Section 2 the Riemanna-Liouville (2), Grünwald-Letnikov (4) and Caputo (5) operator are presented. Section 3 describes the transfer function and block diagrams of classical PI, PD, PID controllers and proportional-integral, proportional-derivative, proportional-integral-derivative controllers of order ½. The simulation results of the control system of proportional-integral and proportional-derivative classical controllers and of order ½ are shown and compared. The systems have been tested for setpoint change. Computer simulations have been performed in the MATLAB/Simulink environment. Section 4 provides an approach to control of order ½ described in [7]. It is based on fractal geometric objects, which are used for electrical systems (Fig. 4). In Section 3 the obtained results are compared with the results from simulations of the control systems.
    Źródło:
    Pomiary Automatyka Kontrola; 2014, R. 60, nr 3, 3; 171-175
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Approximation models for the evaluation of TCP/AQM networks
    Autorzy:
    Marek, Dariusz
    Domański, Adam
    Domańska, Joanna
    Szyguła, Jakub
    Czachórski, Tadeusz
    Klamka, Jerzy
    Filus, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/2173690.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    diffusion approximation
    active queue management
    AQM
    congestion control
    dropping packets
    fluid flow approximation
    FFA
    non-integer order PIγ controller
    G/G/1/N queueing model
    przybliżenie dyfuzji
    aktywne zarządzanie kolejką
    kontrola zatorów
    upuszczanie pakietów
    przybliżenie przepływu płynu
    model kolejkowania G/G/1/N
    Opis:
    The article proposes a model in which Diffusion Approximation is used to analyse the TCP/AQM transmission mechanism in a multinode computer network. In order to prevent traffic congestion, routers implement AQM (Active Queue Management) algorithms. We investigate the influence of using RED-based AQM mechanisms and the fractional controller PIγ on the transport layer. Additionally, we examine the cases in which the TCP and the UDP flows occur and analyse their mutual influence. Both transport protocols used are independent and work simultaneously. We compare our solution with the Fluid Flow approximation, demonstrating the advantages of Diffusion Approximation.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 4; art. no. e141986
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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