TY - JOUR
T1 - Matching demodulation transform with application to feature extraction of rotor rub-impact fault
AU - Wang, Shibin
AU - Chen, Xuefeng
AU - Li, Guoying
AU - Li, Xiang
AU - He, Zhengjia
PY - 2014/5
Y1 - 2014/5
N2 - Conventional time-frequency analysis (TFA) methods have played an important role in characterizing the TF pattern of nonstationary signals. In this paper, a new TFA algorithm, called matching demodulation transform (MDT), is introduced to extract the highly oscillatory frequency modulation (FM) feature of rotor rub-impact fault. When a rub-impact fault occurs in the rotor system, vibration signals will present the FM feature because of the periodic rub-impact between the stator and the rotor. Through a partial demodulation and stepwise refinement procedure, the highly oscillatory FM feature is represented with satisfactory energy concentration in the time-frequency plane. The validity and practical utility of the MDT is then demonstrated on an experimental rotor system and a practical heavy oil catalytic cracking machine set with a rotor rub-impact fault. The analysis results show that the MDT is powerful in the analysis of FM signals and is an effective tool for the feature extraction of rub-impact faults.
AB - Conventional time-frequency analysis (TFA) methods have played an important role in characterizing the TF pattern of nonstationary signals. In this paper, a new TFA algorithm, called matching demodulation transform (MDT), is introduced to extract the highly oscillatory frequency modulation (FM) feature of rotor rub-impact fault. When a rub-impact fault occurs in the rotor system, vibration signals will present the FM feature because of the periodic rub-impact between the stator and the rotor. Through a partial demodulation and stepwise refinement procedure, the highly oscillatory FM feature is represented with satisfactory energy concentration in the time-frequency plane. The validity and practical utility of the MDT is then demonstrated on an experimental rotor system and a practical heavy oil catalytic cracking machine set with a rotor rub-impact fault. The analysis results show that the MDT is powerful in the analysis of FM signals and is an effective tool for the feature extraction of rub-impact faults.
KW - Feature extraction
KW - instantaneous frequency
KW - matching demodulation transform
KW - rotor fault diagnosis
KW - time-frequency analysis
UR - https://www.scopus.com/pages/publications/84898784714
U2 - 10.1109/TIM.2013.2283552
DO - 10.1109/TIM.2013.2283552
M3 - 文章
AN - SCOPUS:84898784714
SN - 0018-9456
VL - 63
SP - 1372
EP - 1383
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
IS - 5
M1 - 6646286
ER -