| 调制信号的时频分布特征及应用 |
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| 引用本文： | 孟庆丰 何正嘉. 调制信号的时频分布特征及应用[J]. 振动、测试与诊断, 1994, 14(4): 7-14 |
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| 作者姓名： | 孟庆丰 何正嘉 |
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| 作者单位： | 西安交通大学机械工程学院 |
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| 基金项目： | 国家自然科学基金,机械结构强度和振动国家重点实验室资助 |
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| 摘 要： | 幅值调制和频率调制在滚动轴承和齿轮箱振动信号中是常见的现象，调制特征的识别和分析已广泛应用于机械振动监测与故障诊断．时额分析的Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布为识别这类调制现象提供了一种十分有效的分析途径。本文针对Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布中存在的实际问题结合应用提出了一些解决办法，并通过仿真分析探讨了调制信号的Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布特征，最后给出了一个应用实例．
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| 关 键 词： | 幅值调制 频率调制 时频信号分析 机械振动 |
Time-Frequency Distributions of Modulating Signals and Their Applications |
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| Meng Qingfeng, He Zhengjia, Zhao Jiyuan. Time-Frequency Distributions of Modulating Signals and Their Applications[J]. Journal of Vibration,Measurement & Diagnosis, 1994, 14(4): 7-14 |
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| Authors: | Meng Qingfeng He Zhengjia Zhao Jiyuan |
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| Abstract: | Amplitude modulation and frequency modulation are a common sight in rotating element bearing and gearbox vibration signals. Modulated phenomena differentiation and analysis have been used extensively in machinry vibration monitoring and diagnosis. The WignerVille distribution, a popular technique of signal time-frequency analysis, has provided a very effective way to distinguish this phenomena. This paper puts forward several methods to solve the practical problems which are present in the applications of the Wigner-Ville distribution and inquires into the Wigner-Ville distributions of modulating signals through digital simulations. Finally, a practical example is given. |
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| Keywords: | Amplitude modulation Frequency modulation Wigner-Ville distribution |
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