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Wyświetlanie 1-5 z 5
Tytuł:
Analiza i optymalizacja zgrzewów ultradźwiękowych przewodów miedzianych z wykorzystaniem logiki rozmytej
Analysis and optimization of ultrasonic copper wires using fuzzy logic approach
Autorzy:
Zawadzki, Jacek
Jędryczka, Cezary
Powiązania:
https://bibliotekanauki.pl/articles/377786.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
zgrzewanie ultradźwiękowe
logika rozmyta
Opis:
W artykule skoncentrowano się na badaniu wpływu podstawowych parametrów procesu zgrzewania ultradźwiękowego takich jak: amplituda wibracji, siła nacisku oraz czas zgrzewania na wybrane parametry jakościowe uzyskanego połączenia przewodów miedzianych. Badania przeprowadzono metodą czynnikową (ang. fractional desing) z czterema poziomami. Jako parametry jakościowe mierzono siłę zrywania (Fpull), siłę odrywania (Fpeel) oraz obszar zgrzewu. Wyniki przeprowadzonych badań eksperymentalnych wykorzystano do opracowania nieliniowego modelu regresji drugiego stopnia. Ze względu na wariację wyników badań oraz parametrów wejściowych przy tworzeniu reguł modelu wykorzystano logikę rozmytą. Zastosowanie logiki rozmytej pozwoliło na uniezależnienie się od konieczności prowadzenia badań niszczących w procesie produkcyjnym i osiągnięcie najwyższego poziomu jakości zgrzewów.
Ultrasonic welding has been used in the market over the past thirty years. Very short time, low energy consumption, repeatability and lack of additional materials and operations during the connection process are key reasons for which this technology has been found advantageous in the mass production. Nevertheless the problems faced by industry regarding to ultrasonic welding are the poor weld quality and low strength of the joints surface when the welding parameters are incorrect. In this paper, the control parameters like vibration amplitude, weld pressure and weld time are considered for the welding and copper wires (Cu-ETP1). Experiment is conducted according to the fractional design with replications to get the responses like tensile shear stress and T-peel stress and weld area. Measured data are utilized to develop fuzzy logic model between responses and predictors. As a quality is an very important issue in these manufacturing industries, the optimal combinations of these parameters are found using fuzzy logic approach.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2019, 100; 157-166
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk of irreversible demagnetisation under transient states of the line start permanent magnet synchronous motor taking into account magnet temperature
Autorzy:
Zawilak, Tomasz
Jędryczka, Cezary
Powiązania:
https://bibliotekanauki.pl/articles/27309960.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
demagnetisation
falling out of step
permanent magnets
synchronous motor
Opis:
The paper focusses on the analysis of the demagnetisation process of permanent magnets in line-start synchronous motors in dynamic states related to start-up and resynchronisation. A field-circuit model of electromagnetic phenomena was used to analyse the demagnetisation process, taking into account the influence of temperature on the properties of permanent magnets and their resistance to demagnetisation. The results of the conducted research have shown, among other things, that the process of resynchronisation of the motor is much more dangerous from the standpoint of the risk of demagnetisation than the start-up itself.
Źródło:
Archives of Electrical Engineering; 2023, 72, 4; 1107--1119
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite element analysis and experimental verification of high reliability synchronous reluctance machine
Autorzy:
Łyskawinski, Wiesław
Jędryczka, Cezary
Stachowiak, Dorota
Łukaszewicz, Piotr
Czarnecki, Michał
Powiązania:
https://bibliotekanauki.pl/articles/2087025.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
synchronous reluctance motor
measurement methods
finite element analysis
equivalent circuit
Opis:
The aim of this study was to investigate and analyse the synchronous reluctance machine. An accurate method for determining the lumped parameters of an equivalent circuit of the studied machine has been proposed. The method is based on the phase currents and voltages analysis at low slip operation. Experimental research of a synchronous reluctance machine is supplemented by simulation studies. The field-circuit model of electromagnetic phenomena in the considered motor was developed and used in simulation. The proposed method allows the numerical model to be verified by comparing the calculated and measured torqueangle characteristics of the machine. The test results obtained are presented and discussed. Achieved satisfactory concordance between simulation and experiment results proves that the proposed approach can be useful in the synthesis of reliable synchronous reluctance machines as well as in their control systems.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 2; 386--393
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automated test bench for research on electrostatic separation in plastic recycling application
Autorzy:
Regulski, Roman
Czarnecka-Komorowska, Dorota
Jędryczka, Cezary
Sędziak, Dariusz
Rybarczyk, Dominik
Netter, Krzysztof
Barański, Mariusz
Barczewski, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/2090721.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
recycling
automotive plastics waste
separation
electrostatic separator
recykling
odpady tworzyw sztucznych z samochodów
separacja
separator elektrostatyczny
Opis:
Many researchers in the developed countries have been intensively seeking effective methods of plastic recycling over the past years. Those techniques are necessary to protect our natural environment and save non-renewable resources. This paper presents the concept of an electrostatic separator designed as a test bench dedicated to the separation of mixed plastic waste from the automotive industry. According to the current policy of the European Union on the recycling process of the automotive industry, all these waste materials must be recycled further for re-entering into the life cycle (according to the circular economy). In this paper, the proposed concept and design of the test bench were offered the feasibility to conduct research and technological tests of the electrostatic separation process of mixed plastics. The designed test bench facilitated assessing the impact of positions of high-voltage electrodes, the value and polarity of the high voltage, the variable speed of feeders and drums, and also triboelectrification parameters (like time and intensity) on the process, among others. A specialized computer vision system has been proposed and developed to enable quick and reliable evaluation of the impact of process parameters on the efficiency of electrostatic separation. The preliminary results of the conducted tests indicated that the proposed innovative design of the research stand ensures high research potential, thanks to the high accuracy of mixed plastics in a short time. The results showed the significant impact of the corona electrode position and the value of the applied voltage on the separation process effectiveness. It can be concluded that the results confirmed the ability to determine optimally the values of the studied parameters, in terms of plastic separation effectiveness. This study showed that this concept of an electrostatic separator designed as a test bench dedicated for separation of mixed plastic waste can be widely applied in the recycling plastic industry.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; e136719, 1--11
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automated test bench for research on electrostatic separation in plastic recycling application
Autorzy:
Regulski, Roman
Czarnecka-Komorowska, Dorota
Jędryczka, Cezary
Sędziak, Dariusz
Rybarczyk, Dominik
Netter, Krzysztof
Barański, Mariusz
Barczewski, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/2173591.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
recycling
automotive plastics waste
separation
electrostatic separator
recykling
odpady tworzyw sztucznych z samochodów
separacja
separator elektrostatyczny
Opis:
Many researchers in the developed countries have been intensively seeking effective methods of plastic recycling over the past years. Those techniques are necessary to protect our natural environment and save non-renewable resources. This paper presents the concept of an electrostatic separator designed as a test bench dedicated to the separation of mixed plastic waste from the automotive industry. According to the current policy of the European Union on the recycling process of the automotive industry, all these waste materials must be recycled further for re-entering into the life cycle (according to the circular economy). In this paper, the proposed concept and design of the test bench were offered the feasibility to conduct research and technological tests of the electrostatic separation process of mixed plastics. The designed test bench facilitated assessing the impact of positions of high-voltage electrodes, the value and polarity of the high voltage, the variable speed of feeders and drums, and also triboelectrification parameters (like time and intensity) on the process, among others. A specialized computer vision system has been proposed and developed to enable quick and reliable evaluation of the impact of process parameters on the efficiency of electrostatic separation. The preliminary results of the conducted tests indicated that the proposed innovative design of the research stand ensures high research potential, thanks to the high accuracy of mixed plastics in a short time. The results showed the significant impact of the corona electrode position and the value of the applied voltage on the separation process effectiveness. It can be concluded that the results confirmed the ability to determine optimally the values of the studied parameters, in terms of plastic separation effectiveness. This study showed that this concept of an electrostatic separator designed as a test bench dedicated for separation of mixed plastic waste can be widely applied in the recycling plastic industry.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; art. no. e136719
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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