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Wyszukujesz frazę "point tracking" wg kryterium: Temat


Tytuł:
Algorytmy śledzenia punktu mocy maksymalnej (MPPT) w systemach fotowoltaicznych
Algorithms of maximum power point tracking (MPPT) in photovoltaic systems
Autorzy:
Zaremba, A.
Rodziewicz, T.
Wacławek, M.
Powiązania:
https://bibliotekanauki.pl/articles/126793.pdf
Data publikacji:
2012
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
metody śledzenia
punkt mocy maksymalnej
systemy fotowoltaiczne
tracking algorithm
maximal power point
photovoltaic systems
Opis:
Przedstawiono przegląd podstawowych metod śledzenia punktu mocy maksymalnej w systemach fotowoltaicznych, tj.: metody pośrednie oraz bezpośrednie. Zagadnienie to jest bardzo ważne w nowoczesnych systemach fotowoltaicznych, ponieważ pozwala ono na zoptymalizowanie uzysku energii przy danych parametrach wejściowych (napromieniowanie, warunki pogodowe, temperatura itp.). Pokazano sposób działania poszczególnych algorytmów, a dla wybranych podano wzory opisujące ich działanie. Przeanalizowano słabe i silne strony wybranych metod oraz możliwości ich zastosowania w nowoczesnych systemach fotowoltaicznych.
Paper shows an overview of the basic algorithms of maximum power point tracking (MPPT) in the photovoltaic systems, ie the direct and indirect methods. This issue is very important in modern photovoltaic systems because it allows to optimize the energy yield for given input parameters (irradiation, weather conditions, temperature, etc.). Paper shows how the different algorithms work, and for selected models gives equations describing their results. Also examines the strengths and weaknesses of selected methods and their applicability in modern photovoltaic systems.
Źródło:
Proceedings of ECOpole; 2012, 6, 2; 805-810
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of practical and theoretical accuracy of wireless indoor positioning system Ubisense
Autorzy:
Woźniak, M.
Odziemczyk, W.
Nagórski, K.
Powiązania:
https://bibliotekanauki.pl/articles/106897.pdf
Data publikacji:
2013
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
positioning systems
RTLS
point tracking
systemy pozycjonowania
punkt śledzenia
Opis:
This paper presents the accuracy investigation results and functionality of Ubisense RTLS positioning system. Three kinds of studies were conducted: test of calibration accuracy, analysis of theoretical accuracy of the coordinates determination as well as accuracy measurements in field conditions. Test of calibration accuracy was made with several different geometric constellation of reference points (tag positions). We determined changes of orientation parameters of receivers and disturbance of positioning points coordinates against chosen reference points constellations. Analysis of theoretical accuracy was made for several receivers spatial positions and their orientations. It allowed to indicate favourable and unfavourable measurement area considering accuracy and reliability. Real positioning accuracy of the Ubisense system was determined by comparison with coordinates measured using precise tacheometer TCRP1201+. Results of conducted experiments and accuracy analysis of test measurement were presented in figures and diagrams.
Źródło:
Reports on Geodesy and Geoinformatics; 2013, 95; 36-48
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Study of the Accuracy of AIS and ARPA Indications. Part 1. Accuracy of the CPA Indications
Autorzy:
Wawruch, R.
Powiązania:
https://bibliotekanauki.pl/articles/117390.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Automatic Identification System (AIS)
ARPA
Closest Point of Approach (CPA)
accuracy
CPA Accuracy
comparative study
radar tracking
AIS target
Opis:
According to the IMO recommendation when the target data from radar tracking and AIS are both available and the association criteria are fulfilled such that the radar and AIS information are considered as for one physical target, then as a default condition in radar equipment should be automatically selected and displayed the AIS target symbol and the alphanumerical AIS target data only. The article presents research conducted in real sea conditions on the reliability of information presented by the ship's AIS and ARPA about the passing distance with the other vessel tracked by radar equipment and fitted with AIS.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 439-443
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of maximum power point tracking methods for photovoltaic systems
Autorzy:
Talha, A.
Boumaaraf, H.
Bouhali, O.
Powiązania:
https://bibliotekanauki.pl/articles/229456.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
maximum power point tracking (PPT)
PV
P&O
incremental conductance
fuzzy logic
converter
Opis:
The output characteristics of photovoltaic (PV) arrays are nonlinear and change with the solar irradiance and the cell's temperature. Therefore, a maximum power point tracking (MPPT) technique is needed to draw peak power from the solar array to maximize the produced energy. Among the hill climbing methods, the perturb and observe (P&O) method tracks the maximum power point (MPP) by repeatedly increasing or decreasing the output voltage at the MPP of the PV module. The implementation of the method is relatively simple, but it cannot track the MPP when the irradiance varies quickly with time. In addition, itmay cause system oscillation around the peak power points due to the effect of measurement noise. The incremental conductance (IncCond) method is also often used in PV systems. This method tracks the MPPs by comparing the incremental and instantaneous conductances of the solar array. This method requires longer conversion time, and a large amount of power loss results. In addition, extra hardware circuitry is required to implement the system. In this paper, it is shown that the negative effects associated with such a drawback can be greatly reduced if the intelligent method is used to improve P&O and IncCond algorithms. The perturbation step is continuously approximated by using fuzzy logic controller (FLC). By the digital simulation, the validity of the proposed control algorithm is proved.
Źródło:
Archives of Control Sciences; 2011, 21, 2; 151-165
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maximum power point tracking techniques for low-cost solar photovoltaic applications – Part I: constant parameters and trial-and-error
Autorzy:
Sutikno, Tole
Cahya Subrata, Arsyad
Pau, Giovanni
Jusoh, Awang
Ishaque, Kashif
Powiązania:
https://bibliotekanauki.pl/articles/2202545.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
incremental conductance
maximum power point tracking
measurement and comparison
perturb and observe
solar photovoltaic (PV)
trial-and-error
Opis:
The development of research on the maximum power point tracking (MPPT) controller has increased significantly in this decade. The MPPT technique, however, is still demanding because of the ease and simplicity of implementing tracking technique on the maximum power point (MPP). In this paper, MPPT techniques and their modifications from various literature are classified and examined in detail. The discussions are focused on the main objective of obtaining the best possible MPPT technique with the best results at a low cost. The assessment for the selection of MPPT techniques is based on assessments from the previous literature. The discussion of the MPPT technique assessment is divided into two parts. In Part I, the MPPT technique based on constant parameters, and trial-and-error will be discussed in detail, along with its algorithm development in recent times.
Źródło:
Archives of Electrical Engineering; 2023, 72, 1; 125--145
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maximum power point tracking techniques for low-cost solar photovoltaic applications – Part II: Mathematical Calculation and Measurement and Comparison, criteria on choices and suitable MPPT techniques
Autorzy:
Sutikno, Tole
Subrata, Arsyad Cahya
Pau, Giovanni
Jusoh, Awang
Ishaque, Kashif
Powiązania:
https://bibliotekanauki.pl/articles/24202731.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Incremental Conductance
maximum power point tracking
Measurement and Comparison
Perturb and Observe
solar photovoltaic
trial-and-error
Opis:
In the last decade, there has been a substantial surge in the advancement of research into the maximum power point tracking (MPPT) controller. The MPPT approaches, on the other hand, continue to be in high demand due to the ease and simplicity with which tracking techniques can be implemented on the maximum power point (MPP). Diverse MPPT approaches and their modifications from various literature are categorized and thoroughly explored in this work, which is divided into two sections. The discussions are centered on the primary goal of attaining the most extraordinary feasible MPPT technique that produces the best results at the lowest possible expense. In order to determine which MPPT approaches to use, evaluations from earlier literature are used to guide the decision. In this section, we will examine the evaluation of the MPPT technique in two sections. Previously, in Part I, we explored the MPPT techniques based on constant parameters and trial-and- error. Part II of this article will examine the MPPT technique, which is based on mathematical computation, measurement, and comparison, and the algorithm development that has occurred in recent years. Furthermore, this section’s assessment for selecting MPPT approaches is based on previous literature reviews. To aid with this selection, the following criteria for the MPPT approach are proposed: sensors and analog/digital requirements, costeffectiveness, simplicity, stability, efficiency, and tracking speed. This enables the reader to select the MPPT technique that is most appropriate for their application.
Źródło:
Archives of Electrical Engineering; 2023, 72, 2; 299--322
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
LEDs based video camera pose estimation
Autorzy:
Sudars, K.
Cacurs, R.
Homjakovs, I.
Judvaitis, J.
Powiązania:
https://bibliotekanauki.pl/articles/200249.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
camera pose estimation
image keypoint detection and matching
3D point reconstruction
object localization and tracking
oszacowanie ustawienia kamery
rekonstrukcja modelu 3D
lokalizacja obiektu
śledzenie obiektu
Opis:
For 3D object localization and tracking with multiple cameras the camera poses have to be known within a high precision. The paper evaluates camera pose estimation via a fundamental matrix and via the known object in environment of multiple static cameras. A special feature point extraction technique based on LED (Light Emitting Diodes) point detection and matching has been developed for this purpose. LED point detection has been solved searching local maximums in images and LED point matching has been solved involving patterned time functions for each light source. Emitting LEDs have been used as sources of known reference points instead of typically used feature point extractors like ORB, SIFT, SURF etc. In such a way the robustness of pose estimation has been obtained. Camera pose estimation is significant for object localization using the networks with multiple cameras which are going to an play increasingly important role in modern Smart Cities environments.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 4; 897-905
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic eye corners detection and tracking algorithm in sequence of thermal medical images
Autorzy:
Strąkowska, M.
Strąkowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/114658.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
eye corners detection
point tracking
IR thermography
thermal image processing
Opis:
The article presents automatic eye corners detection algorithms in thermal images. Its target application is to perform quick and unnoticed measurement of human body temperature. It is proved that the temperature of eyes’ corners is the most reliable and stable temperature considering infrared imaging. That measurements were done manually so far. Our approach is to do this automatically and create complete system for measurement of core human body temperature in crowded places where it is impossible to do this in another way (for example on the airport, railway station). Such system could prevent people for spreading off the epidemic. Two proposed algorithms are presented: first based on morphological operations and geometric features of human face, second based on the cross-correlation and idea of pattern tracking. The selection of appropriate ROI size for reliable temperature extraction was tested according to the distance to person under observation.
Źródło:
Measurement Automation Monitoring; 2015, 61, 6; 199-202
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of the proposed combined Fuzzy Logic Control for Maximum Power Point Tracking and Battery Charge Regulation used in CubeSat
Autorzy:
Seddjar, Abderrahmane
Kerrouche, Kamel Djamel Eddine
Wang, Lina
Powiązania:
https://bibliotekanauki.pl/articles/141115.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
combined Fuzzy Logic Control
Electrical Power System
photovoltaic system
Maximum Power Point Tracking
Battery Charge Regulation
Perturb and Observe
CubeSat
Opis:
One of the most critical systems of any satellite is the Electrical Power System (EPS) and without any available energy, the satellite would simply stop to function. Therefore, the presented research within this paper investigates the areas relating to the satellite EPS with the main focus towards the CubeSat platform. In this paper, an appropriate EPS architecture with the suitable control policy for CubeSat missions is proposed. The suggested control strategy combines two methods, the Maximum Power Point Tracking (MPPT) and the Battery Charge Regulation (BCR), in one power converter circuit, in order to extract the maximum power of the Photovoltaic (PV) system and regulate the battery voltage from overcharging. This proposed combined control technique is using a Fuzzy Logic Control (FLC) strategy serving two main purposes, the MPPT and BCR. Without an additional battery charger circuit and without switching technique between the two controllers, there are no switching losses and the efficiency of the charging characteristic can be increased by selecting this proposed combined FLC. By testing a space-based PV model with the proposed EPS architecture, some simulation results are compared to demonstrate the superiority of the proposed control strategy over the conventional strategies such as Perturb and Observe (P&O) and FLC with a Proportional Integral Derivative (PID) controller.
Źródło:
Archives of Electrical Engineering; 2020, 69, 3; 521-543
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power injection control system and experimental model based on manufacturer characteristic curves for a photovoltaic generation system
Autorzy:
Rico, A.
Cadaval, E. R.
Montero, M. I. M.
Powiązania:
https://bibliotekanauki.pl/articles/262582.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
Inverter Current Controller (ICC)
Inverter Reference Current Generator (ICRG)
maximum power point tracking (MPPT)
Photovoltaic Cell (PV Cell)
PV Voltage and PV Current
VI characteristic equations
Opis:
This paper attempts to validate the performance of a power injection control block for Photovoltaic Generation Systems (PVGS). This device uses a control module based on detecting the power injected into the supply by the inverter, instead of measuring the power generated by the PVGS. The performance is evaluated using the concept of Maximum Energy Curve that takes into account both transient and permanent control performance. The paper presents a basic and simple procedure to obtain a model from the manufacturer characteristic curves of the photovoltaic cells. MATLAB Simulink is used as simulation tool to obtain the response of the proposed system to changes in temperature and irradiance.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2007, 13, 2; 69-75
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-camera system for measuring paper deformations based on image analysis
Autorzy:
Pełczyński, Paweł
Szewczyk, Włodzimierz
Bieńkowska, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1849002.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
digital image processing
characteristic point tracking
paper physical properties
deformation analysis
Poisson’s ratio
Opis:
The article presents a new technique for measuring paper deformation in unidirectional tensile tests, based on recording and analysis of a series of specimen images. The proposed technique differs from the DIC-based deformation measurement in that the cross-correlation of image data has been replaced with linear filtering. For this purpose, a regular grid of markers is printed on the sample. Filtering the image creates local maxima in the places where markers occur. The developed algorithm finds their location with sub-pixel accuracy. Printing a grid of markers on tested paper and use of reference objects visible in the same image as the paper sample, freed from the need to mechanically connect the camera and the universal testing machine and from the necessity to electronically synchronize their work. The obtained deformation distributions and Poisson’s ratios are in accordance with the literature data which confirms the correctness of the developed measurement technique.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 509-522
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-camera system for measuring paper deformations based on image analysis
Autorzy:
Pełczyński, Paweł
Szewczyk, Włodzimierz
Bieńkowska, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1849104.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
digital image processing
characteristic point tracking
paper physical properties
deformation analysis
Poisson’s ratio
Opis:
The article presents a new technique for measuring paper deformation in unidirectional tensile tests, based on recording and analysis of a series of specimen images. The proposed technique differs from the DIC-based deformation measurement in that the cross-correlation of image data has been replaced with linear filtering. For this purpose, a regular grid of markers is printed on the sample. Filtering the image creates local maxima in the places where markers occur. The developed algorithm finds their location with sub-pixel accuracy. Printing a grid of markers on tested paper and use of reference objects visible in the same image as the paper sample, freed from the need to mechanically connect the camera and the universal testing machine and from the necessity to electronically synchronize their work. The obtained deformation distributions and Poisson’s ratios are in accordance with the literature data which confirms the correctness of the developed measurement technique.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 509-522
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-camera system for measuring paper deformations based on image analysis
Autorzy:
Pełczyński, Paweł
Szewczyk, Włodzimierz
Bieńkowska, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1849045.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
digital image processing
characteristic point tracking
paper physical properties
deformation analysis
Poisson’s ratio
Opis:
The article presents a new technique for measuring paper deformation in unidirectional tensile tests, based on recording and analysis of a series of specimen images. The proposed technique differs from the DIC-based deformation measurement in that the cross-correlation of image data has been replaced with linear filtering. For this purpose, a regular grid of markers is printed on the sample. Filtering the image creates local maxima in the places where markers occur. The developed algorithm finds their location with sub-pixel accuracy. Printing a grid of markers on tested paper and use of reference objects visible in the same image as the paper sample, freed from the need to mechanically connect the camera and the universal testing machine and from the necessity to electronically synchronize their work. The obtained deformation distributions and Poisson’s ratios are in accordance with the literature data which confirms the correctness of the developed measurement technique.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 509-522
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust estimation based nonlinear higher order sliding mode control strategies for PMSG-WECS
Autorzy:
Nazir, Awais
Khan, Safdar Abbas
Khan, Malak Adnan
Alam, Zaheer
Khan, Imran
Irfan, Muhammad
Rehman, Saifur
Nowakowski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/27311430.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
wind energy conversion systems
WECS
robust control
maximum power point tracking
MPPT
sliding mode control
SMC
super-twisting algorithm
STA
high gain observer
artificial neural network
ANN
function fitting
backstepping
śledzenie maksymalnego punktu mocy
obserwator o dużym wzmocnieniu
sztuczna sieć neuronowa
dopasowanie funkcji
system konwersji energii wiatrowej
sterowanie odporne
sterowanie ślizgowe
algorytm super skręcania
Opis:
The wind energy conversion systems (WECS) suffer from an intermittent nature of source (wind) and the resulting disparity between power generation and electricity demand. Thus, WECS are required to be operated at maximum power point (MPP). This research paper addresses a sophisticated MPP tracking (MPPT) strategy to ensure optimum (maximum) power out of the WECS despite environmental (wind) variations. This study considers a WECS (fixed pitch, 3KW, variable speed) coupled with a permanent magnet synchronous generator (PMSG) and proposes three sliding mode control (SMC) based MPPT schemes, a conventional first order SMC (FOSMC), an integral back-stepping-based SMC (IBSMC) and a super-twisting reachability-based SMC, for maximizing the power output. However, the efficacy of MPPT/control schemes rely on availability of system parameters especially, uncertain/nonlinear dynamics and aerodynamic terms, which are not commonly accessible in practice. As a remedy, an off-line artificial function-fitting neural network (ANN) based on Levenberg-Marquardt algorithm is employed to enhance the performance and robustness of MPPT/control scheme by effectively imitating the uncertain/nonlinear drift terms in the control input pathways. Furthermore, the speed and missing derivative of a generator shaft are determined using a high-gain observer (HGO). Finally, a comparison is made among the stated strategies subjected to stochastic and deterministic wind speed profiles. Extensive MATLAB/Simulink simulations assess the effectiveness of the suggested approaches.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 5; art. no. e147063
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy logic controller based maximum power point tracking technique for different configurations of partially shaded photovoltaic system
Autorzy:
Naick, B. K.
Chatterjee, K.
Chatterjee, T. K.
Powiązania:
https://bibliotekanauki.pl/articles/141010.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
partially shaded configuration
photovoltaic system
maximum power point tracking
fuzzy logic controller
tracking efficiency
Opis:
A solar photovoltaic (PV) system has been emerging out as one of the greatest potential renewable energy sources and is contributing significantly in the energy sector. The PV system depends upon the solar irradiation and any changes in the incoming solar irradiation will affect badly on the output of the PV system. The solar irradiation is location specific and also the atmospheric conditions in the surroundings of the PV system contribute significantly to its performance. This paper presents the cumulative assessment of the four MPPT techniques during the partial shading conditions (PSCs) for different configurations of the PV array. The partial shading configurations like series-parallel, bridge link, total cross tied and honeycomb structure for an 84 PV array has been simulated to compare the maximum power point tracking (MPPT) techniques. The MPPT techniques like perturb and observe, incremental conductance, extremum seeking control and a fuzzy logic controller were implemented for different shading patterns. The results related to the maximum power tracked, tracking efficiency of each of the MPPT techniques were presented in order to assess the best MPPT technique and the best configuration of the PV array for yielding the maximum power during the PSCs.
Źródło:
Archives of Electrical Engineering; 2018, 67, 2; 307-320
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

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