TY - GEN
T1 - Matching demodulation transform with applications to feature extraction of rotor rub-impact fault
AU - Wang, Shibin
AU - Li, Guoying
AU - Chen, Xuefeng
AU - Xia, Yi
AU - Liu, Zhonghua
PY - 2013
Y1 - 2013
N2 - Conventional time-frequency representation (TFR) methods have played an important role in characterizing the time-frequency (TF) pattern of the nonstationary signal. In this paper, a new TFR algorithm, called matching demodulation transform (MDT), is introduced to extract the feature of highly oscillating frequency modulation for rotor rub-impact fault. When the early rub-impact fault occurs in the rotor system, the vibration signals will present frequency modulation feature because of the periodic rub-impact between the stator and the rotor. Through an iterative demodulation procedure, the highly oscillating frequency modulation feature is represented with satisfactory energy concentration in TF plane. The validity of the technique is then demonstrated on a real rotor system of a gas turbine with rub-impact fault. The analysis result of this application shows that the MDT method is powerful in the analysis of frequency modulation signals and is an effective tool for the feature extraction of rub-impact faults.
AB - Conventional time-frequency representation (TFR) methods have played an important role in characterizing the time-frequency (TF) pattern of the nonstationary signal. In this paper, a new TFR algorithm, called matching demodulation transform (MDT), is introduced to extract the feature of highly oscillating frequency modulation for rotor rub-impact fault. When the early rub-impact fault occurs in the rotor system, the vibration signals will present frequency modulation feature because of the periodic rub-impact between the stator and the rotor. Through an iterative demodulation procedure, the highly oscillating frequency modulation feature is represented with satisfactory energy concentration in TF plane. The validity of the technique is then demonstrated on a real rotor system of a gas turbine with rub-impact fault. The analysis result of this application shows that the MDT method is powerful in the analysis of frequency modulation signals and is an effective tool for the feature extraction of rub-impact faults.
KW - feature extraction
KW - instantaneous frequency
KW - rub-impact
KW - time-frequency representation
UR - https://www.scopus.com/pages/publications/84882288712
U2 - 10.1109/I2MTC.2013.6555705
DO - 10.1109/I2MTC.2013.6555705
M3 - 会议稿件
AN - SCOPUS:84882288712
SN - 9781467346221
T3 - Conference Record - IEEE Instrumentation and Measurement Technology Conference
SP - 1703
EP - 1707
BT - 2013 IEEE International Instrumentation and Measurement Technology Conference
T2 - 2013 IEEE International Instrumentation and Measurement Technology Conference: Instrumentation and Measurement for Life, I2MTC 2013
Y2 - 6 May 2013 through 9 May 2013
ER -