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Tytuł:
Π(G,x) polynomial and (G) index of Armchair Polyhex Nanotubes TUAC6 [m,n]
Autorzy:
Farahani, M. R.
Powiązania:
https://bibliotekanauki.pl/articles/412239.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Molecular Graph
Armchair Polyhex Nanotubes and Nanotori
Omega polynomial
Pi polynomial
Pi index
Opis:
Let G be a simple connected graph with the vertex set V = V(G) and the edge set E = E(G), without loops and multiple edges. For counting qoc strips in G, Omega polynomial was introduced by Diudea and was defined as Ω(G,x ) = [wzór] where m(G,c) be the number of qoc strips of length c in the graph G. Following Omega polynomial, the Sadhana polynomial was defined by Ashrafi et al as Sd(G,x) = [wzór]. In this paper we compute the Pi polynomial Π(G,x) =[wzór] and Pi index Π(G ) = [wzór] of an infinite class of “Armchair Polyhex Nanotubes TUAC 6 [m,n]”.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 17, 2; 201-206
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative study based on proportional integral and backstepping controllers for doubly fed induction generator used in wind energy conversion system
Autorzy:
Moumani, Youssef
Laafou, Abdeslam Jabal
Madi, Abdessalam Ait
Powiązania:
https://bibliotekanauki.pl/articles/2202553.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
backstepping control
control
Doubly FedInduction
Grid Side Converter
MPPT
Maximum Power Point Tracking
PI
Rotor Side Converter
wind turbine
Opis:
This paper presents a comparative study between the conventional PI (Proportional Integral) and backstepping controllers applied to the DFIG (Doubly Fed Induction Generator) used in WECS (Wind Energy Conversion System). These two different control strategies proposed in this work are developed to control the active and reactive power of the DFIG on the one hand, and to maintain the DC-link voltage constant for the inverting function on the other hand. This is ensured by generating control signals for two power electronic converters, RSC (Rotor Side Converter) and GSC (Grid Side Converter). In order to optimise the power production in the WT (Wind Turbine), an MPPT (Maximum Power Point Tracking) algorithm is applied along with each control technique. To simulate the effectiveness of the proposed controllers, MATLAB/Simulink Software is used, and the obtained results are analysed and discussed to compare PI and backstepping controllers in terms of robustness against wind speed variations and tracking performance in dynamic and steady states.
Źródło:
Archives of Electrical Engineering; 2023, 72, 1; 211--228
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
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:
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:
A teaching stand for controlling building automation with Raspberry Pi
Autorzy:
Płocheć, Maciej
Majcher, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/377502.pdf
Data publikacji:
2020
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
building automation
Raspberry Pi
Opis:
Building automation is a rapidly growing branch of electronics in recent years. This is due to the ever wider range of devices available on the market, as well as their decreasing prices. In addition to systems dedicated to the control of intelligent buildings such as KNX or LCN, new manufacturers are increasingly emerging to offer interesting solutions at an affordable price. As a rule, these devices are based on existing solutions, and individual manufacturers add new elements in hardware or software form. This paper presents a project of building automation controlled by Raspberry Pi. This microcomputer controls individual installations to provide functionality similar to that offered by dedicated systems.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2020, 105; 29-36
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptacja regulatora PI za pomocą reguł logicznych
Adaptation of PI controller by means of logic rules
Autorzy:
Hoczek, T.
Powiązania:
https://bibliotekanauki.pl/articles/276841.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
regulator PI
adaptacja
logika
regulacja
PI
adaptation
logic
control
Opis:
We współczesnej literaturze wiele uwagi poświęca się zagadnieniom pomiaru jakości układów regulacji. Jednym z najważniejszych wskaźników poprawnego działania regulatora jest przebieg odpowiedzi układu sterowania na działające na niego zakłócenie. W niniejszym artykule zaproponowano metodę adaptacji parametrów regulatora PI opartą na regułach logicznych. Pokazano, iż sposób powrotu systemu do stanu ustalonego daje wskazówki, które można wykorzystać do optymalizacji parametrów regulatora PI. Jednocześnie metoda ta jest na tyle prosta, iż implementacja jej w sterowniku PLC nie będzie stanowić trudności. Zbadano również zapas stabilności, jaki zapewnia procedura adaptacyjna dla procesów o różnych parametrach.
In the article a new method of PI controller adaptation was introduced. It was shown that way how controlled process is returning to its set value, after set point change or disturbance, can give guidelines for PI regulator tuning. Moreover, the proposed method is very simple and can be implemented in every PLC controller. The inference part of the solution can be implemented separately and allows tuning of the PLC build in PI controllers. The proposed method dump oscillations and limits overshoots, which appears in the process output. It was shown that obtained gain and phase margins are enough big to be safe.
Źródło:
Pomiary Automatyka Robotyka; 2013, 17, 10; 156-159
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
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:
An arma type pi-sigma artificial neural network for nonlinear time series forecasting
Autorzy:
Akdeniz, E.
Egrioglu, E.
Bas, E.
Yolcu, U.
Powiązania:
https://bibliotekanauki.pl/articles/91816.pdf
Data publikacji:
2018
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
high order artificial neural networks
pi-sigma neural network, forecasting
recurrent neural network
particle swarm optimization (PSO)
Opis:
Real-life time series have complex and non-linear structures. Artificial Neural Networks have been frequently used in the literature to analyze non-linear time series. High order artificial neural networks, in view of other artificial neural network types, are more adaptable to the data because of their expandable model order. In this paper, a new recurrent architecture for Pi-Sigma artificial neural networks is proposed. A learning algorithm based on particle swarm optimization is also used as a tool for the training of the proposed neural network. The proposed new high order artificial neural network is applied to three real life time series data and also a simulation study is performed for Istanbul Stock Exchange data set.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2018, 8, 2; 121-132
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
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:
An elbow planar manipulator driven by induction motors using sliding mode control for current loop
Autorzy:
Diniz, E. C. de
Júnior, A. B. S.
Honório, D. A.
Barreto, L. H. S. C.
Reis, L. L. N. dos
Powiązania:
https://bibliotekanauki.pl/articles/206213.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
sliding mode control
induction motor drives
manipulators
digital signal processor
PI controllers
Opis:
The control of a planar elbow manipulator driven by a squirrel-cage induction motor using sliding mode control (SMC) is presented in this paper. The modeling of the manipulator mechanical coupling as a load applied to the induction motor shaft is developed. This has direct influence on both dq currents, which are chosen as the sliding manifold instead of controlling both mechanical and electrical parts as individual processes like most industrial manipulators do. Conventional proportional-integral (PI) controllers are used for each loop, implying easy design procedure and implementation with low computational effort. The system can then be implemented by using a digital signal processor (DSP) and applied in industrial environments. Simulation and experimental results on a real manipulator are shown to validate the proposed control scheme. The results show that there is low steady-state error for the manipulator position.
Źródło:
Control and Cybernetics; 2012, 41, 2; 395-413
0324-8569
Pojawia się w:
Control and Cybernetics
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:
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:
Angle-Resolved UV Photoemission from Single Crystals of AgPd Alloys
Autorzy:
Ilver, L.
Nilsson, P. O.
Powiązania:
https://bibliotekanauki.pl/articles/1924334.pdf
Data publikacji:
1993-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
79.60.Gs
71.25.Pi
Opis:
The angular dependence of photoemission energy distributions were measured from single crystal, substitutional disordered alloys Ag$\text{}_{x}$Pd$\text{}_{1-x}$ with x = 0.97 and x = 0.90. The random hybridization between the Ag 5sp band and the Pd 4d state is discussed in terms of complex energies.
Źródło:
Acta Physica Polonica A; 1993, 83, 1; 125-132
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the Raspberry Pi 4 micro-controller for the conceptual design of the baby monitor
Zastosowanie mikrokontrolera Raspberry Pi 4 do projektu koncepcyjnego niani elektronicznej
Autorzy:
Kowalski, Sławomir
Radzik, Michał
Sromek, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/2130868.pdf
Data publikacji:
2021
Wydawca:
Państwowa Wyższa Szkoła Zawodowa w Nowym Sączu
Tematy:
Raspberry Pi 4
electronic nanny
python
wireless communication
niania elektroniczna
komunikacja bezprzewodowa
Opis:
The subject of the work is a conceptual design of a baby monitor. The central control system for the system is the Raspberry Pi 4 platform. In the next stages, practical aspects related to the topic of work are discussed. Selected components of the system were presented, connection diagrams between individual components were developed and the assembly process of a fully functional system was presented. Then the source code of the program controlling the operation of the electronic system was characterized. In the last stage, the method of testing and the results of the performed functional tests of the complete system being the subject of the study were described.
Przedmiotem pracy jest projekt koncepcyjny niani elektronicznej. Centralnym systemem sterowania systemem jest platforma Raspberry Pi 4.W kolejnych etapach omawiane są praktyczne aspekty związane z tematem pracy. Przedstawiono wybrane elementy systemu, opracowano schematy połączeń pomiędzy poszczególnymi elementami, a także proces montażu w pełni funkcjonalnego systemu. Następnie scharakteryzowano kod źródłowy programu sterującego pracą układu elektronicznego. W ostatnim etapie opisano metodę testowania i wyniki przeprowadzonych testów funkcjonalnych kompletnego systemu będącego przedmiotem badań.
Źródło:
Journal of Engineering, Energy and Informatics; 2021, 1; 43-52
2720-4162
2720-5541
Pojawia się w:
Journal of Engineering, Energy and Informatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of ultrasonic distance sensors for measuring height as a tool in unmanned aerial vehicles with a stabilized position in the vertical plane
Autorzy:
Bilewski, M.
Putynkowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/135446.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
UAV
ultrasonic distance sensors
height measurement
arduino
raspberry Pi
netduino
Opis:
The paper presents a review of ultrasonic sensors. Attention is focused on the possibility of using such sensors to keep an unmanned aerial vehicle at a constant altitude above the surface. Such a task requires filtered and unfiltered signals, so that the ground level can be distinguished even when obstacles are present. Three selected sensors were tested. The possibility of connecting these sensors to external devices was also studied. The potential of the individual sensors and of a set of sensors is discussed. The study showed that the best solution is to use a set of three ultrasonic sensors. Alternatively, a sensor with both unfiltered and filtered measurement was proved to be an adequate option.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 46 (118); 17-21
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł

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