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当前位置: 首页 > 文章 > 基于局域波时频谱的旋转机械早期故障诊断技术 农业机械学报 2005,36 (1) 117-120
Position: Home > Articles > Application of Local Wave Time-frequency Spectrum to Diagnosis of Early Faults of Rotating Machinery Transactions of the Chinese Society for Agricultural Machinery 2005,36 (1) 117-120

基于局域波时频谱的旋转机械早期故障诊断技术

作  者：
王凤利;马孝江
单  位：
大连理工大学机械工程学院;大连海事大学轮机工程学院
关键词：
旋转机械;故障诊断;局域波时频谱
摘  要：
提出了一种具有自适应特性的时频分析方法——局域波时频谱 ,对旋转机械中常见的动静件碰摩、不对中早期故障信号进行了分析 ,和频谱分析进行了比较。结果表明局域波法能清晰地描述振动信号的时频特征 ,为工程实际中转子系统的早期故障诊断提供了有效的依据。
译  名：
Application of Local Wave Time-frequency Spectrum to Diagnosis of Early Faults of Rotating Machinery
作  者：
Wang Fengli1 Ma Xiaojiang2 (1.Dalian Maritime University 2.Dalian University of Technology)
关键词：
Rotating machinery, Fault diagnosis, Local wave time-frequency spectrum
摘  要：
A new adaptive time-frequency analysis method, local wave time-frequency spectrum was developed. The method improves the concentration of time-frequency spectrum, and removes noise and rejects the gross terms from signal. A true time-frequency characteristics of a signal can be obtained by this method. Based on its features of both time-domain and frequency-domain, the method can be applied to analyze the experimental data of two kinds of early faults, such as rotor and stator rub and misalignment happened in rotating machinery. The results from ordinary frequency analysis are also given. The comparison between the two kinds of analysis results was carried out, it showed that the method could express clearly the time-frequency characteristics of vibration signal, and supply an effective information for the early fault diagnosis.

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