Autor: Grochowina, Marcin - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Genetic algorithms in active vibration reduction problem
Autorzy:: Grochowina, Marcin
Tyburski, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/2202428.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:: active vibration control
genetic algorithm
PID
aktywna kontrola drgań
algorytm genetyczny
Opis:: The design of active vibration reduction systems usually consists in selecting a control algorithm and determining the value of its settings. This article presents the results of research on the concept of using genetic algorithms to induce the settings of control systems. To test the concept, a simple pulse-excited flat bar model was selected. The vibrations were suppressed by the PID controller. Genetic algorithms with two types of crossover were tested - arithmetic and uniform. As a result, the settings for the PID controller were obtained, enabling effective reduction of vibrations in a short time.
Źródło:: Vibrations in Physical Systems; 2022, 33, 2; art. no. 2022219
0860-6897
Pojawia się w:: Vibrations in Physical Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of the possibility of mechanical devices supervision based on the measurement of the vibration level and SVM classifiers
Autorzy:: Schossler, Ryszard
Grochowina, Marcin
Leniowska, Lucyna
Powiązania:: https://bibliotekanauki.pl/articles/24202009.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:: SVM classifier
vibration pattern
gyroscope
accelerometer
one-class classifier
two-class classifier
klasyfikator SVM
wzór drgań
żyroskop
akcelerometr
klasyfikator jednoklasowy
klasyfikator dwuklasowy
Opis:: This paper presents the concept of diagnosing the technical condition of mechanical devices. The test is based on a non-invasive vibration analysis technique combined with the use of artificial intelligence method. The object of the research is an electric motor for which vibrations were recorded by a vibration sensor based on four 3-axis digital accelerometers and MPU-6050 gyroscopes. The effectiveness of classification methods using the two-class and one-class classification was compared. It has been shown that the use of an incomplete pattern of the vibration model and a single-class classifier allows for effective detection of anomalies in the operation of an induction motor. Satisfactory classification efficiency was achieved, despite the limitation of the teaching set only to the information obtained during the correct operation of the device. The described method is universal and can be used to diagnose the technical condition of many different types of technical devices.
Źródło:: Vibrations in Physical Systems; 2022, 33, 3; art. no. 2022316
0860-6897
Pojawia się w:: Vibrations in Physical Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Vibration reduction assessment of layered acoustic metamaterial
Autorzy:: Świrk, Patrycja
Żyłka, Wojciech
Leniowska, Lucyna
Grochowina, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/2202422.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:: reduction of vibration
layered plate
acoustic metamaterial
point mass
distributed model
redukcja drgań
płyta warstwowa
metamateriały akustyczne
masa punktowa
model rozproszony
Opis:: Acoustic meta-materials offer an approach to reducing the vibration and noise transmission through layered panels. In this paper, the investigation of constructed meta-material for reduction of low-frequency vibration and noise is a major concern. The key concept underlying this approach is to construct the metamaterial as a highly-distributed system of tuned point masses that introduce instead of low resonance frequency one or more bands of higher frequency. They can be then successfully damped with passive methods. Using the modes method, a metamaterial system with distributed point masses integrated into the honeycomb core was designed to be a representative layered panel. To determine the dynamic response of the global sandwich panel, the metamaterial system was tested for 70 Hz and 120 Hz excitation. The obtained results confirm the possibility of tuning the considered layered meta-material to the excitation frequency and shifting low frequencies towards higher frequencies.
Źródło:: Vibrations in Physical Systems; 2022, 33, 2; art. no. 2022221
0860-6897
Pojawia się w:: Vibrations in Physical Systems
Dostawca treści:: Biblioteka Nauki