| 金属跌落零件冲击响应信号的时频分析 |
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| 引用本文： | 毛汉领,陈仲仪.金属跌落零件冲击响应信号的时频分析[J].振动．测试与诊断,1997,17(4):47-52. |
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| 作者姓名： | 毛汉领 陈仲仪 |
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| 作者单位： | 广西大学机械系!南宁，530004(毛汉领，王小纯)，浙江大学机械系!杭州，310027(陈仲仪) |
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| 基金项目： | 国家自然科学基金!59175238 |
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| 摘 要： | 分别研究了用平滑Wigner分布和小波变换分析跌落零件冲击信号的方法，比较了各种分析方法的特点。结果表明，这些时频域分析方法有很多优越性，但是也存在一些有待进一步研究的问题。
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| 关 键 词： | 时频描述 冲击信号 跌落零件 |
Time-Frequency Representaions of Impact Signal Caused by the Loose Parts in Mechanical Equipment |
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| Mao Hanling ,Wang Xiaochun, Chen Zhongyi.Time-Frequency Representaions of Impact Signal Caused by the Loose Parts in Mechanical Equipment[J].Journal of Vibration,Measurement & Diagnosis,1997,17(4):47-52. |
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| Authors: | Mao Hanling Wang Xiaochun Chen Zhongyi |
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| Abstract: | Several methods for analyzing the impact signal caused by the loose parts in mechanical equipment using smooth Wigner distribution and wavelet transform analyses in the time-frequency domain are studied. Compared with the traditional spectrum analysis,the time frequency represetation may reveal the spectrum structure as well as the time-varying characteristics of the signal. Specifically,multiresolution signal decomposition by wavelet transform has some advantages in identification and classification of the loose parts. However, some problems still remain to be furtl1er studied. |
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| Keywords: | time-frequency representation impact signal loose parts |
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