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Wyszukujesz frazę "FFT analyzer" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
A smart fault identification system for ball bearing using simulation-driven vibration analysis
Autorzy:
Khaire, Pallavi
Phalle, Vikas
Powiązania:
https://bibliotekanauki.pl/articles/27309884.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
condition monitoring
bearing defect
FFT analyzer
BPFI
BPFO
multiclass support
vector machine
monitorowanie stanu
wada łożyska
analizator FFT
maszyna wektorowa
Opis:
Bearings are one of the pivotal parts of rotating machines. The health of a bearing is responsible for the hassle-free operation of a machine. As vibration signatures give intimations of machine failure at an earlier stage, mostly vibration-based condition monitoring is used to monitor bearing’s health for avoiding the risk of failure. In this work, a simulation-based approach is adopted to identify surface defects at ball bearing raceways. The vibration data in time and frequency domain is captured by FFT analyzer from an experimental setup. The time frequency domain conversion of a raw time domain data was carried out by wavelet packet transform, as it takes into account the transients and spectral frequencies. The rotor bearing model is simulated in Ansys. Finally, most influencing statistical features were extracted by employing Principal Component Analysis (PCA), and fed to Multiclass Support Vector Machine (MSVM). To train the algorithm, the simulated data is used whereas the data acquired from FFT analyzer is used for testing. It can be concluded that the defects are characterized by Ball Pass Frequency (BPF) at inner race and outer raceway as indicated in the literature. The developed model is capable to monitor bearing’s health which gives an average accuracy of 99%.
Źródło:
Archive of Mechanical Engineering; 2023, LXX, 2; 247--270
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Residual life estimation of structural beam using experimental and numerical modal analysis methods
Autorzy:
Siva, Gandam Anand
Ramakrishna, Shinigam
Powiązania:
https://bibliotekanauki.pl/articles/1819188.pdf
Data publikacji:
2020
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
structural beam
residual life estimation
FFT analyzer
damage detection
crack location
natural frequencies
belka strukturalna
ocena trwałości resztkowej
analiza FFT
wykrywanie uszkodzeń
lokalizacja pęknięć
częstotliwości drgań własnych
Opis:
A structural beam is a common element in many mechanical structures such as ship propeller shaft, crane boom, and aircraft wings. In the present paper experimental and numerical modal analysis are carried out for estimating the damage, geometric location of the damage, severity of damage and residual life of structural beam to prevent unexpected failures of mechanical structures. Experimental and numerical modal analysis results for healthy and cracked beam are compared for validation of numerical methodology used in the present paper. Experimental modal analysis is performed on both healthy and cracked beam with the help of impact hammer, acceleration sensor and FFT (Fast Fourier Transformer) analyzer associated with EDM (Engineering Data Management) software. Modal tests are conducted using impact method on selected locations of the entire healthy and cracked beam to find the first three natural frequencies, which are used to detect the presence of damage and geometric location of the damage. Three parametric studies are carried out to know the effect of crack depth, crack location and crack orientation on the natural frequencies of the cracked beam. Finally, the residual life of a healthy and cracked beam was estimated using Basiquin’s equation and finite element analysis software called ANSYS 18.1.
Źródło:
Journal of Mechanical and Energy Engineering; 2020, 4, 2; 135--146
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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