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  1. 11 Przegląd Elektrotechniczny
  2. 5 Elektronika : konstrukcje, technologie, zastosowania
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  1. 8 Tchórzewski J.
  2. 3 Lewandowski D.
  3. 3 Novash I.
  4. 3 Rumiantsev Y.
  5. 3 Tchórzewski Jerzy
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  1. 1 2024
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1
Estymacja parametrów transmisji w symulowanym torze nadawczo-odbiorczym z wykorzystaniem techniki OFDM i kodowania korekcyjnego w warunkach polowych
Zamłyńska Monika, Falkowski-Gilski Przemysław, Debita Grzegorz, Zamłyński Mariusz, Sierpowski Korneliusz, Górski Krzysztof, Śliwak-Orlicki Tomasz
Elektronika : konstrukcje, technologie, zastosowania
|
2024
|
Vol. 65, Nr 7
22--26
PL
Publikacja koncentruje się na modelowaniu i symulacji systemu nadawczo-odbiorczego wykorzystującego technikę OFDM (Orthogonal Frequency-Division Multiplexing) oraz algorytmu kodowania korekcyjnego zaimplementowanego w środowisku MATLAB/Simulink. Projekt opiera się na standardzie ETSI (Eu-Eu ropean Telecommunications Standards Institute) EN (European Standard) 300 401 v. 2.1.1 dla systemów DAB/DAB+ (Digital Audio Broqadcasting/ Digital Audio Broqadcasting Plus) i bazuje na zestawie modeli kanałów radiokomunikacyjnych imitujących warunki polowe, aby symulować realne środowisko operacyjne. Kluczowe badania skupiały się na analizie Bitowej Stopy Błędu (BER), która pozwoliła ocenić jakość transmisji radiowej. W pracy zaproponowano również kierunki przyszłych badań, w tym implementację FEC (Forward Error Correction), wykonanie testów subiektywnych i adaptację systemu do platformy SDR (Software Defined Radio), co ma na celu dalsze zwiększenie jego efektywności operacyjnej.
EN
This publication focuses on the modeling and simulation of a transmitter-receiver system utilizing Orthogonal Frequency Division Multiplexing (OFDM) techniques and corrective coding algorithms, implemented within the MATLAB/Simulink environment. The project adheres to the ETSI EN 300 401 v. 2.1.1 standard for DAB/DAB+ systems and employs channel models that mimic field conditions to simulate a realistic operational environment. Key studies concentrated on the analysis of the Bit Error Rate (BER), which assessed the quality of the radio transmission. The paper also proposes directions for future research, including the implementation of Forward Error Correction (FEC), conducting subjective tests, and adapting the system to a Software Defined Radio (SDR) platform, aimed at further enhancing its operational efficiency.
2
Content available Selection of the programming environment for neural modelling of the power and electricity demand generation systems in terms of unmanned factories
Tchórzewski Jerzy, Rosochacki Sebastian
Studia Informatica : systems and information technology
|
2023
|
Vol. 2(29)
95--106
EN
The work concerns the selection of the programming language and environment for the needs of neural modeling of the power and electricity demand generation system in terms of uninhabited factories. Therefore, the main goal of the conducted research is to obtain the best possible Artificial Neural Network, i.e. to teach it a model of a real system, which is a system for generating demand for power and electricity based on numerical data on parts of the power system operation in terms of uninhabited factories. The learning capabilities of artificial neural networks were checked by comparing the MSE error and the Regression Index R2. In each of the examined programming languages and related programming environments, i.e. Matlab, Python and Wolfram, an Artificial Neural Network with the same structure and properties was designed and implemented, i.e. with the same number of input and output neurons, the number of hidden layers and the number of neurons in them, the activation function of neurons and the learning method. In addition to the ANN training of the system model, testing and validation as well as comparative studies were carried out.
3
Content available Comparative study of the efficiency, effectiveness and robustness of the TGE S.A. Day-Ahead Market model and system
Marlęga Radosław, Tchórzewski Jerzy
Studia Informatica : systems and information technology
|
2023
|
Vol. 1(28)
29--45
EN
The article contains selected results of comparative research on the quality of the parametric model, corrected in selected situations with the use of ANN and the Day-Ahead Market system of TGE S.A. carried out in MATLAB and Simulink. The System Identification Toolbox library was used for identification tests and Simulink for simulation and comparative tests. The comparative studies used such measures of model and system quality as: efficiency, effectiveness and robustness. Their waveforms as well as their average values and absolute errors and relative errors between the identification model or the identification-neural model and the system were obtained. The results of general tests were shown for the hours: 6:00, 12:00, 18:00 and 24:00 in 2019, and the detailed tests for 6:00. The sensitivity of the waveforms obtained in terms of model quality and the Day-Ahead Market system was also tested, depending on the assumed values of such parameters as e.g. electricity volume or volume-weighted average price of electricity.
4
Content available remote Rozkład wielkości kryształów nadzorowany przez agenta uczenia ze wzmocnieniem z wykorzystaniem czujnika tomografii hybrydowej w procesie krystalizacji
Niderla Konrad, Kłosowski Grzegorz
Przegląd Elektrotechniczny
|
2023
|
R. 99, nr 3
102--105
PL
W pracy opisano wykorzystanie uczenia ze wzmocnieniem w modelu Simulink do symulacji sterowania procesem krystalizacji. Przedstawiono również stanowisko akwizycji danych tomograficznych służące do sterowania rzeczywistym procesem krystalizacji zarządzanym agentem uczenia ze wzmocnieniem. Rekonstrukcja obrazu z systemu tomograficznego umożliwia agentowi uczenia ze wzmocnieniem uzyskanie dodatkowych danych w czasie rzeczywistym o stanie środowiska, co z kolei pozwoli kontrolerowi na prowadzenie procesu.
EN
This paper describes the use of reinforcement learning in the Simulink model to simulate the control of the crystallization process. A tomographic data acquisition workstation for controlling the actual crystallization process managed by a reinforcement learning agent is also presented. Reconstructing the image from the tomographic system allows the reinforcement learning agent to obtain additional real-time data about the state of the environment, which in turn will allow the controller to guide the process.
5
Content available Solutions of the nonlinear evolution problems and their applications
Amir Muhammad, Haider Jamil Abbas, Rahman Jamshaid Ul, Ashraf Asifa
Acta Mechanica et Automatica
|
2023
|
Vol. 17, no. 3
357--363
EN
In this article, a well-known technique, the variational iterative method with the Laplace transform, is used to solve nonlinear evolution problems of a simple pendulum and mass spring oscillator, which represents the duffing equation. In the variational iteration method (VIM), finding the Lagrange multiplier is an important step, and the variational theory is often used for this purpose. This paper shows how the Laplace transform can be used to find the multiplier in a simpler way. This method gives an easy approach for scientists and engineers who deal with a wide range of nonlinear problems. Duffing equation is solved by different analytic methods, but we tackle this for the first time to solve the duffing equation and the nonlinear oscillator by using the Laplace-based VIM. In the majority of cases, Laplace variational iteration method (LVIM) just needs one iteration to attain high accuracy of the answer for linearization anddiscretization, or intensive computational work is needed. The convergence criteria of this method are efficient as compared with the VIM. Comparing the analytical VIM by Laplace transform with MATLAB’s built-in command Simulink that confirms the method’s suitability for solving nonlinear evolution problems will be helpful. In future, we will be able to find the solution of highly nonlinear oscillators.
6
Content available Sliding mode control system for an active current converter
Efimov Aleksandr, Nerć Arkadiusz
Zeszyty Naukowe Akademii Morskiej w Szczecinie
|
2022
|
nr 69 (141)
37--44
EN
In this study, a functional diagram for an automatic sliding mode control system for a three-phase bridge buck current converter was developed. To achieve this, a simulation program was created in MATLAB/Simulink which analyzed the dynamic performance of the developed automatic control system, operating in the active rectifier and network current inverter modes. The results present the mathematical modeling outputs, along with the analyzed control algorithm and the automatic control system of the buck current converter evaluated.
7
Content available Development of Fiber-Optic Sensors System, Based on Fiber Bragg Gratings
Kalizhanova Aliya, Kunelbayev Murat, Wojcik Waldemar, Kozbakova Ainur, Aitkulov Zhalau, Malikova Feruza
Journal of Ecological Engineering
|
2022
|
Vol. 23, nr 10
98--106
EN
An article herein considers the development of a fiber-optic sensor system, based on fiber Bragg gratings. Presently, fiber-optic sensors has become world-widely known amongst sensor technologies, used for monitoring engineering and construction structures. The work is linked with developing the system from fiber-optic sensors on the basis of fiber optic gratings, its characteristics, deformation behavior and temperature, acting at fiber Bragg grating by means of computer modeling. The research is focused at the analysis of characteristics and deformation and temperature behavior of fiber-optic Bragg sensor. Fiber-optic Bragg sensor with tilted grating is used for measuring deformation of the object, the strength of which is changed, dependent on the applied force, as well, for measuring and detecting any temperature deviations, influencing at fiber Bragg grating, which might bring to fire and accidents. In the research, simulation modeling there was made in the MATLAB (Simulink) software.
8
Content available Dynamic modelling of bacteriophage production process
Konopacki Maciej, Grygorcewicz Bartłomiej, Gliźniewicz Marta, Miłek Dominika, Kordas Marian, Rakoczy Rafał
Chemical and Process Engineering
|
2022
|
Vol. 43, nr 4
471–-482
EN
Bacteriophages, viruses that can infect bacteria, are promising alternatives for antibiotic treatment caused by antibiotic-resistant bacteria strains. For that reason, the production of bacteriophages is extensively studied. Mathematical modelling can lead to the improvement of bioprocess by identification of critical process parameters and their impact on the demanded product. Dynamic modelling considers a system (i.e. bioreactor or bioprocess) as a dynamic object focusing on changes in the initial and final parameters (such as biomass concentration and product formation) in time, so-called signals and treats the studied system as a “black box” that processes signals. This work aimed to develop a mathematical model that describes bacteriophage production process. As result, we created a dynamic model that can estimate the number of bacteriophages released from cells as plaque-forming units at specific time points based on the changes in the bacteria host-cell concentration. Moreover, the proposed model allowed us to analyze the impact of the initial virus concentration given by multiplicity of infection (MOI) on the amount of produced bacteriophages.
9
Content available Transient Energy Models of Housing Facilities Operation
Deshko Valerii, Bilous Inna, Biriukov Dmytro, Yatsenko Olena
Rocznik Ochrona Środowiska
|
2021
|
Tom 23
539--551
EN
Buildings are the main consumer of energy resources in the total energy balance of the countries in Central and Eastern Europe, the main energy consumption is allocated for heating. Efficient use of energy resources for heating needs to a large extent depends on the efficiency of regulation of heating systems. In the article, dynamic mathematical models of a two-room typical apartment in Ukraine, built in 2016, were developed in Matlab and EnergyPlus software environment. The simulations were carried out using IWEC hourly climate data for the city of Kyiv. The results of simulations of thermal energy consumption in Matlab are characterized by a larger range of fluctuations of the heating system load, which is typical for the real operating conditions of the system with the controller of ON/OFF type. In EnergyPlus it is assumed that the gas boiler operates continuously in the ON mode. In the research, the change of load on the apartment heating system was studied at different numbers and locations of air temperature control sensors installation, according to which the controller of the autonomous gas boiler operates.
10
Content available Cluster analysis on the example of work data of the National Power System. Part 2, Research and selected results
Tchórzewski Jerzy, Kania Tomasz
Studia Informatica : systems and information technology
|
2020
|
Vol. 1-2(24)
5--23
EN
The work is a continuation of the article under the same main title and subtitle Part 1. Comparative study of methods and conditions. This article concerns the cluster analysis, which was carried out on the example of data concerning the operation of the National Power System, namely the total generations of nCDGUs and CDGUs listed by PSE Operator. Two algorithms were used to obtain the results of the cluster analysis, i.e. the Ward algorithm and the algorithm of self-organizing twodimensional topographic maps. The obtained results were interpreted and their discussion and interpretation were conducted.
11
Content available remote Increase of operation speed of digital measuring elements of microprocessor protection of electrical installations
Romanyuk Fyodor, Rumiantsev Vladimir, Dziaruhina Alena, Kachenya Vladislav, Kierczyński Konrad
Przegląd Elektrotechniczny
|
2020
|
R. 96, nr 3
150--153
EN
The article presents the digital measuring elements of microprocessor protection, which use combined digital filters to determine the controlled signal during a time equal to a quarter of the period of fundamental frequency. The model of the proposed digital measuring body is implemented in the Matlab-Simulink system. Analysis of the results of computational experiments confirmed the correct functioning of the digital measuring element that had been proposed.
PL
W artykule przedstawiono cyfrowe elementy pomiarowe zabezpieczenia mikroprocesorowego, które wykorzystują połączone filtry cyfrowe do określania kontrolowanego sygnału w czasie równym jednej czwartej okresu częstotliwości podstawowej. Model proponowanego cyfrowego elementu pomiarowego jest zaimplementowany w systemie Matlab-Simulink. Analiza obliczeniowych wyników potwierdziła prawidłowe działanie zaproponowanego cyfrowego elementu pomiarowego.
12
Content available Design and test of simulation model of the controller of electromechanical tap-changers for hv/mv transformer
Korpikiewicz Jarosław, Mohamed-Seghir Mostefa
Scientific Journal of Gdynia Maritime University
|
2019
|
nr 109
30--46
EN
At present, the simulation model of the electromechanical tap changer controller is not generally available. It is necessary in order to carry out tests of the voltage regulation system in the Main Supply Point (MSP). It is a lower voltage regulation system. The article presents simulation models of the tap changer controller working in a HV/MV station. The construction of all subsystems of the model is presented. Various methods of implementation of current compensation were also considered. The subsystems of the model and the whole have been simulated.
13
Research and analysis of simulation models of solar cells and PV modules
Parfianowicz Kamil
Rynek Energii
|
2019
|
Nr 6
77--82
EN
The article describes a single-diode solar cell model and simulations of this model in the Simulink. The model was made in two variants - first where the value of serial resistance is known to the user and can be entered manually into the tested model and the second variant where the program calculates this value on the basis of the other module parameters from the datasheet. The obtained results were compared with the advanced program to make instalations PVSyst.
PL
W artykule opisano jednodiodowy model ogniwa fotowoltaicznego oraz wykonano jego symulacje w programie Simulink. Model został wykonany w dwóch wariantach – pierwszym gdzie wartość rezystancji szeregowej jest znana użytkownikowi i można ją wpisać ręcznie do badanego modelu oraz w wariancie drugim, gdzie program sam obliczy tę wartość na podstawie pozostałych parametrów modułu z karty katalogowej. Otrzymane wyniki zostały porównane z zaawansowanym programem do obliczeń instalacji fotowoltaicznych PVSyst.
14
Zastosowanie interfejsu graficznego pakietu Matlab/Simulink do utworzenia aplikacji systemu wbudowanego STM32F4 dla robota mobilnego
Kaczmarek Wojciech, Rychlik Piotr
Przegląd Mechaniczny
|
2019
|
nr 7-8
28--30
PL
W artykule przedstawiono opracowaną i wykonaną konstrukcję robota mobilnego wyposażonego w system wbudowany oparty na układzie STM32F4, którego oprogramowanie utworzono za pomocą graficznego interfejsu użytkownika środowiska Matlab/Simulink oraz dodatkowych narzędzi i bibliotek dla nich przeznaczonych. Opisane przykłady demonstrują możliwości wybranych komponentów pakietu Simulink.
EN
The article presents a real developed mobile robot equipped with an STM32F4 embedded system, and it’s software generated with the help of Matlab/Simulink’s graphical users interface, and an additional provided tools and libraries. Described examples demonstrate capabilities of the selected Simulink's components.
15
Symulator robota mobilnego uwzględniający uszkodzenia
Stęczniewski P., Przystałka P.
Modelowanie Inżynierskie
|
2018
|
T. 37, nr 68
111--118
PL
Przedmiotem pracy badawczej jest symulator robota mobilnego Explorer 6WD, który uwzględnia stan pełnej zdatności oraz stany z uszkodzeniami. Omówiono elementy składowe symulatora robota oraz przedstawiono modele jego otoczenia, które zrealizowane są w środowisku V-REP. W ramach prac badawczych zaprojektowano i utworzono sieć ROS, która umożliwia integrację symulatora z modułami zewnętrznymi zrealizowanymi z wykorzystaniem środowiska MATLAB®/Simulink®. W tej części pracy objaśniono sposób komunikacji pomiędzy programami oraz omówiono strukturę i zawartość poszczególnych wiadomości. Scharakteryzowano modele uszkodzeń oraz przedstawiono interfejs użytkownika. W artykule zawarto również opis wybranych wyników badań weryfikacyjnych, które potwierdzają dużą przydatność opracowanego rozwiązania.
EN
The focus of the paper is on the simulator of the Explorer 6WD mobile robot taking into account faultless and faulty conditions. There are discussed the components of the mobile robot simulator and environment models which are implemented in the V-REP software. As a part of the research work, a ROS network has been designed and created, which enables integration of the simulator with external modules realized using the MATLAB®/ Simulink® environment. This part of the paper explains how to communicate between ROS nodes and discusses the structure and content of ROS messages. In the paper, fault models are characterized and a user interface is presented as well. This study also contains a description of selected results of verification tests that confirm the effectiveness of the developed approach.
16
Content available Functional simulation model of the axial flux permanent magnet generator
Gołębiowski M., Smoleń A., Gołębiowski L., Mazur D.
Archives of Electrical Engineering
|
2018
|
Vol. 67, nr 4
857--868
EN
The paper discusses in detail the construction of the Core Less Axial Flux Permanent Magnet generator simulation model. The model has been prepared in such a way that full compatibility with the elements of the SimPowerSystem library of the Matlab/Simulink package is preserved, which allows easy use of the presented simulation model for testing the work of the generator as part of a larger system. The parameters used in the model come from the MES 3D calculations performed in the Ansys/Maxwell software, for a machine prototype with a rated power of 2.8 kW, which was then used to experimentally verify the correct operation of the presented model of machine.
17
Content available Analiza ruchowa pojazdów szynowych z uwzględnieniem zmian napięcia na odbieraku prądu
Jarzębowicz L., Judek S.
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
|
2017
|
Nr 57
29--32
PL
W artykule zaproponowano metodykę wykonywania analizy ruchowej pojazdów szynowych, która uwzględnia wpływ zmieniającego się napięcia zasilającego pojazd na jego właściwości ruchowe. Wykorzystując model opracowany w programie Simulink wskazano na istotne różnice w czasie przejazdu oraz w wartościach napięcia zasilającego pomiędzy proponowanym sposobem analizy a powszechnie stosowanym podejściem uproszczonym.
EN
The paper proposes a novel approach to analyze a rail vehicle motion, which includes an impact of varying voltage at the current collector on the vehicle’s dynamics. According to present standards, vehicle’s maximal power has to be limited and the value of this limit depends on actual value of vehicle’s supplying voltage. This, in turn, affects vehicle tractive effort and its current consumption. A model reflecting vehicle dynamics as well as its supply parameters was designed in Simulink. By a case study, it was proven that neglecting the impact of vehicle varying supply voltage on vehicle dynamics leads to substantial errors in reflecting both vehicle motion and its supply-related parameters.
18
Content available remote Application of a software package for transmission line digital overcurrent protection testing in the MATLAB-SIMULINK environment
Romanyuk F., Novash I., Rumiantsev Y., Rogalski P.
Przegląd Elektrotechniczny
|
2017
|
R. 93, nr 5
148--151
EN
The article proves the possibility of implementing a software package for digital overcurrent protection testing in the Matlab-Simulink environment. A comparison of simulation results obtained with the use of the proposed software package with the results obtained with the use of the other software, as well as with the calculations of transient processes has been performed. The parameters calculation methods of the proposed software package are presented.
PL
Artkuł udowadnia możliwość implementacji pakietu oprogramowania przeznaczonego do badania cyfrowego zabezpieczenia nadprądowego w środowisku Matlab-Simulink. Przeprowadzono porównanie wyników uzyskanych za pomocą proponowanego pakietu oprogramowania i innego oprogramowania, jak również obliczeń stanów przejściowych. Zaprezentowano metody wyznaczania parametrów proponowanego pakietu oprogramowania.
19
Content available Modeling of photovoltaic modules in Simulink and Simscape packages of Matlab software
Sarniak M.
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
|
2017
|
Vol. 6, No 1
133--138
EN
The paper presents the possibilities of modeling the functioning of photovoltaic modules in MATLAB engineering software packages. In SIMULINK package one implemented a single-mode mathematical model of the photovoltaic module for determining current-voltage characteristics. The model was verified for manufacturer-supplied data and actual measurement results made with the I-V 400 meter. The new capabilities for physical modeling of photovoltaic modules are also available in the SIMSCAPE package. Simulation results obtained from the SIMSCAPE model were also compared with the results of selected measurements under the specified radiation and temperature conditions.
20
Content available Fuzzy-logic expert system to estimate the risks of high-speed railways projects
Vygnanov A. A., Fironov A. N.
Autobusy : technika, eksploatacja, systemy transportowe
|
2017
|
R. 18, nr 12
651--655, CD
EN
Complex infrastructure projects like high-speed rail line, require a deep and comprehensive risk analysis. In the process of implementation, there are many uncertainties, changes and degree of impact of risks on the project. The article from the point of view of methodology project management the approach to risk analysis project high speed railway Moscow - Kazan, based on the methods of fuzzy logic. Developed and proposed Simulink model of risk assessment given the dynamics of development of the project.
PL
Artykuł przedstawia aspekty zarządzania projektami metodologii podejścia do analizy ryzyka projektu szybkiej kolei Moskwa - Kazań, oparty o metody logiki rozmytej. Opracowano i zaproponowano model oceny ryzyka w programie Simulink, z uwagi na dynamikę rozwoju projektu.
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