Journal
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
Volume 63, Issue 5, Pages 1372-1383Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2013.2283552
Keywords
Feature extraction; instantaneous frequency; matching demodulation transform; rotor fault diagnosis; time-frequency analysis
Funding
- National Natural Science Foundation of China [51225501, 51035007]
- Research Fund for the Doctoral Program of Higher Education of China [20120201110028]
- Program for Changjiang Scholars and Innovative Research Team in University
Ask authors/readers for more resources
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-requency 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available