Time-frequency demodulation analysis based on iterative generalized demodulation for fault diagnosis of planetary gearbox under nonstationary conditions

被引：57
|
作者：
Feng, Zhipeng [1 ]
Chen, Xiaowang [1 ]
Liang, Ming [2 ]
Ma, Fei [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China
[2] Univ Ottawa, Dept Mech Engn, Ottawa, ON K1N 6N5, Canada
来源：
MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2015年 / 62-63卷
基金：
加拿大自然科学与工程研究理事会; 中国国家自然科学基金;
关键词：
Planetary gearbox; Fault diagnosis; Nonstationary; Generalized demodulation; Time-frequency analysis; EMPIRICAL MODE DECOMPOSITION; ENERGY SEPARATION; VIBRATION; DISTRIBUTIONS; TRANSFORM; AMPLITUDE;
D O I：
10.1016/j.ymssp.2015.03.014
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The vibration signal of planetary gearboxes exhibits the characteristics of both amplitude modulation (AM) and frequency modulation (FM), and thus has a complex sideband structure. Time-varying speed and/or load will result in time variant characteristic frequency components. Since the modulating frequency is related to the gear fault characteristic frequency, the AM and FM parts each alone contains the information of the gear fault. We propose a time-frequency amplitude and frequency demodulation analysis metbhod to avoid the complex time-variant sideband analysis, and thereby identify the time-variant gear fault characteristic frequency. We enhance the time-frequency analysis via iterative generalized demodulation (IGD). The time-varying amplitude and frequency demodulated spectra have fine time-frequency resolution and are free of cross term interferences. They do not involve complex time-variant sidebands, thus considerably facilitating fault diagnosis of planetary gearboxes under nonstationary conditions. The method is validated using both numerically simulated data and experimental signals. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：54 / 74
页数：21
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