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Wyświetlanie 1-3 z 3
Tytuł:
The use of computer simulations in the analysis of physical phenomena models
Autorzy:
Dziurdź, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/127720.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
dynamic models
simulation
signal analysis
modele dynamiczne
symulacja
analiza sygnałów
Opis:
Tests of the technical condition of machines sometimes involve the analysis of dynamic phenomena associated with their work. The simplest methods are based on basic measurements, e.g. effective velocities and body vibration accelerations as well as sound pressure levels recorded in close vicinity of the tested object. For analysis, more advanced techniques use signals recorded in a certain period of time representing the studied phenomena. The development of computer techniques has enabled a relatively convenient modelling of technical objects. A well-identified model allows to extend research on real objects to include comprehensive computer analyses, thanks to which we can reduce time-consuming measurements or perform analyses for excitations which are difficult to perform at a test stand. Another application of a model is to generate signals, on the basis of which we can choose parameters of analysis methods to increase the effectiveness of diagnosis or test new analysis and inference algorithms. Several presented examples were implemented in the Matlab Simulink environment. Because the presented methods are universal, they can be used to analyze any physical phenomena described with more or less complicated models.
Źródło:
Vibrations in Physical Systems; 2019, 30, 2; 1-8
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostics of rotary vane vacuum pumps using signal analysis and processing methods
Autorzy:
Łój, Paweł
Cholewa, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/127884.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
vacuum pump
signal analysis
technical diagnostics
pompa próżniowa
analiza sygnałów
diagnostyka techniczna
Opis:
Rotary vane vacuum pumps are devices widely used in various types of industries. A three-phase electric motor, which is a usual drive source in this group of devices, propels rotor, which is eccentric placed in the cylinder. The combination of this arrangement, between cylinder and rotor, with centrifugal force, forces the vanes to move out and into its slots milled in the rotor. As a result, the increase and decrease of the inter-vane volume occur, causing the air to be sucked into the pump. Due to improper exploitation, there is a possibility of a mechanical damage to the vane, and in some cases the vane can fall out of its groove, what leads to catastrophic failure. The article presents a new method for diagnostics of vanes, based on the observation and analysis of a pressure signal, generated by a rotary vane vacuum pump.
Źródło:
Vibrations in Physical Systems; 2019, 30, 2; 1-8
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of machine learning to classify wear level of multi-piston displacement pump
Autorzy:
Iwaniec, Marek
Stojek, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/128216.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
machine learning
diagnostics
signal analysis
multi-piston pump
vibrations
uczenie maszynowe
diagnostyka
analiza sygnałów
pompa wielotłoczkowa
drgania
Opis:
This article specifies application of machine learning for the purpose of classifying wear level of multi-piston displacement pump. A diagnostic experiment that was carried out in order to acquire vibration signal matrices from selected locations within the pump body is described herein. Measured signals were subject to time and frequency analysis. Signal attributes related to time and frequency were grouped in a table in accordance with pump wear level. Subsequently, classification models for the pump wear level were developed through application of Matlab package. Assessment of their accuracy was carried out. A selected model was subject to confirmation. The article includes its summary.
Źródło:
Vibrations in Physical Systems; 2019, 30, 2; 1-14
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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