Autor: Lewicki, Arkadiusz - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ant-based clustering for flow graph mining
Autorzy:: Lewicki, Arkadiusz
Pancerz, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/330782.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: possibly certain sequences
flow graph
rough set
fuzzy set
ant based clustering
graf przepływu danych
zbiór przybliżony
zbiór rozmyty
Opis:: The paper is devoted to the problem of mining graph data. The goal of this process is to discover possibly certain sequences appearing in data. Both rough set flow graphs and fuzzy flow graphs are used to represent sequences of items originally arranged in tables representing information systems. Information systems are considered in the Pawlak sense, as knowledge representation systems. In the paper, an approach involving ant based clustering is proposed. We show that ant based clustering can be used not only for building possible large groups of similar objects, but also to build larger structures (in our case, sequences) of objects to obtain or preserve the desired properties.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2020, 30, 3; 561-572
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Augmented speed control scheme of dual induction motors with mutual flux angle control loop
Autorzy:: Kondratenko, Dmytro
Lewicki, Arkadiusz
Łuksza, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/27309952.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: dual-motor drive
induction motors
IMs
five-leg voltage source inverter
FLVSI
rotor angle control
sensorless control
Opis:: This paper proposes an augmented speed control scheme of dual induction motors fed by a five-leg voltage source inverter (VSI) with a common/shared-leg. An additional control loop is proposed here and based on the mutual flux angle – the difference between flux angular positions of the IMs. The main purpose of this research is to minimize the energy losses in the common inverter leg by controlling the mutual flux angle, at equal angular speeds of both motors. Simulation and experimental studies were carried out and the effectiveness of the proposed control method was proven. The PLECS software package was used for the simulation tests. The laboratory prototypewas prepared for the experimental validation. All results were provided and discussed in this paper.
Źródło:: Archives of Electrical Engineering; 2023, 72, 4; 915--930
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Open-Phase Fault Detection Method for Sensorless Five-Phase Induction Motor Drives with an Inverter Output Filter
Autorzy:: Strankowski, Patryk
Guziński, Jarosław
Wilczyński, Filip
Morawiec, Marcin
Lewicki, Arkadiusz
Powiązania:: https://bibliotekanauki.pl/articles/1193764.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: five-phase induction motor
inverter output filter
open-phase fault detection
Opis:: The paper presents the sensorless five-phase induction motor drive implementation with an inverter output filter with third harmonic injection. For the sensorless operation, the required observers are presented for the first and third harmonics with consideration of the inverter output filter. Moreover, the interaction of the observers and the control system is capable to handle a deactivation of one or two phases, which improves the reliability of the complete drive system. A new idea of online open-phase fault detection is presented based on the frequency analysis of the estimated observer variables. The test setup, fault operation capabilities and an experimental verification of the proposed fault detection method are presented in the paper.
Źródło:: Power Electronics and Drives; 2019, 4, 39; 189-200
2451-0262
2543-4292
Pojawia się w:: Power Electronics and Drives
Dostawca treści:: Biblioteka Nauki

Artykuł

Informacja