Research on State Recognition Technology of Elevator Traction Machine Based on Modulation Feature Extraction

Vibration signal analysis of the traction machine is an important part of the current rotating machinery state recognition technology, and its feature extraction is the most critical step. In this study, the time-frequency characteristics of the vibration of the traction machine under different elev...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2022-11, Vol.22 (23), p.9247
Main Authors: Li, Dongyang, Yang, Jianyi, Liu, Yong
Format: Article
Language:English
Subjects:
Artificial intelligence
Background noise
Demodulation
Eigenvalues
Elevators & escalators
Elevators and Escalators
Fault diagnosis
feature extraction
Fourier transforms
Frequency distribution
Machinery
Magneto-electric machines
Methods
Principal components analysis
Recognition, Psychology
Reproducibility of Results
Signal analysis
Signal processing
state identification
Technology
Time-frequency analysis
traction machine
Vibration
Vibration analysis
vibration signal
Wavelet transforms
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Summary:Vibration signal analysis of the traction machine is an important part of the current rotating machinery state recognition technology, and its feature extraction is the most critical step. In this study, the time-frequency characteristics of the vibration of the traction machine under different elevator running directions, running speeds and load weights are analyzed. The novel demodulation method based on time-frequency analysis and principal component analysis (DPCA) is used to extract the periodic modulated wave signal. In order to compare different influence of background noise and unknown frequency influence, the Fast Fourier Transform (FFT) and Short Time Fourier Transform (STFT) methods are used to extract the characteristics of the traction machine vibration signal, respectively. Under different load conditions, it is difficult to observe the obvious differences and similarities of the vibration signals of the traction machine by time-frequency method. However, the DPCA demodulation method provides a guarantee for the reliability and accuracy of the state identification of the traction machine.
ISSN:1424-8220
1424-8220
DOI:10.3390/s22239247