基于CITD和同态滤波解调的滚动轴承故障诊断方法

钟先友; 曾良才; 赵春华; 陈保家

基于CITD和同态滤波解调的滚动轴承故障诊断方法

1.
武汉科技大学冶金装备及其控制教育部重点实验室, 武汉 430081;
2.
三峡大学水电机械设备设计与维护湖北省重点实验室, 宜昌 443002

基金项目:

国家自然科学基金项目(51075234和51205230)资助

详细信息

作者简介:
钟先友(1977-)，讲师，博士研究生，研究方向为机械故障诊断与信号处理，zhxy@ctgu.edu.cn;曾良才(联系人)，教授，博士生导师，zengliangcai@wust.edu.cn

钟先友(1977-)，讲师，博士研究生，研究方向为机械故障诊断与信号处理，zhxy@ctgu.edu.cn;曾良才(联系人)，教授，博士生导师，zengliangcai@wust.edu.cn

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出版历程
- 收稿日期: 2012-05-22
- 刊出日期: 2015-06-10

Rolling Element Bearings Fault Diagnosis Method Based on CITD and Homomorphic Filtering Demodulation

1.
Education Ministry Key Laboratory of Metallurgical Equipment and Control, Wuhan University of Science and Technology, Wuhan 430081;
2.
Hubei Key Laboratory of Hydroelectric Machinery Design and Maintenance, China Three Gorges University, Yichang 443002

摘要

摘要: 针对轴承故障振动信号的非平稳特征和本征时间尺度分解(intrinsic time-scale decomposition,ITD)方法的缺点,提出了基于三次多项式的本征时间尺度分解方法(cubic polynomial-based intrinsic time-scale decomposition,CITD)和同态滤波的解调方法。首先采用CITD方法对轴承振动信号进行分解,将其分解为若干个合理旋转(proper rotation,PR)分量之和,然后用相关系数筛选出最能表征故障信息的PR分量进行重构,最后对重构信号运用同态滤波解调来提取故障特征。仿真信号与轴承故障诊断工程实例的分析验证了该方法的有效性。
- 本征时间尺度分解 /
- 同态滤波解调 /
- 相关系数 /
- 轴承故障诊断
Abstract: Aiming at the non-stationary characteristics of a bearing fault vibration signal and the disadvantage of In-trinsic Time-scale Decomposition (ITD) method, an improved ITD method combining the Cubic polynomial-based Intrinsic Time-scale Decomposition (CITD) and the homomorphic filtering demodulation was proposed. In this ap-proach, the CITD method was applied to decompose the vibration signal into a finite number of proper rotation com-ponents, then the correlation coefficients were used to select the proper rotation(PＲ) components best representing the fault information and to reconstruct the signal. Finally, the fault characteristics was extracted from the recon-structed signal by homomorphic filtering demodulation. The effectiveness of the present method was verified by anal-ysis of simulation signals and engineering examples of bearing fault diagnosis.
- adaptive filtering /
- demodulation /
- efficiency /
- failure analysis

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参考文献(11)

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