期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 118, 期 -, 页码 209-225出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2018.08.051
关键词
Rotor fault; Signal processing; Rub; Crack; Instantaneous frequency
资金
- National Natural Science Foundation of China, China [51475164, 51675178]
Rub and crack are two important rotor faults. In this paper, the rub, crack and rub-crack coupled fault experiments are performed on a rotor test rig and the instantaneous frequency signatures of the faults are analyzed using Hilbert-Huang transform. The intrawave frequency modulation property of the rub and crack rotor is revealed through the response of Jeffcott rotor model and experiments. It is demonstrated that the intrawave frequency modulation produces extra harmonic components in FFT spectrum. The relationship between the FFT spectrum and the modulation frequency is supplied. The simulated and experimental analysis results show that the different composition of the modulation frequency can be the feature to detect the local rub, crack and crack-rub coupled rotor fault. (C) 2018 Elsevier Ltd. All rights reserved.
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