| 变速机械弱时变信号幅值谱校正的多点平均法 |
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| 引用本文： | 朱利民,熊有伦,钟秉林.变速机械弱时变信号幅值谱校正的多点平均法[J].振动工程学报,2001,14(1):47-52. |
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| 作者姓名： | 朱利民 熊有伦 钟秉林 |
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| 作者单位： | 1. 华中科技大学机械学院机械电子信息工程系
2. 东南大学机械工程系 |
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| 基金项目： | 国家“九五”攀登计划资助项目(编号：PD9521903) |
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| 摘 要： | 系统而完整地提高了处理变速机械弱时变响应信号的离散频谱多点平均幅值修正法的理论和方法，严格证明了该方法能精确地计算出平稳信号和频率微弱波动信号的幅值，能近似地计算出幅值和频率均微弱波动的信号的平均幅值，并应用这套理论成功地解释了频率微弱波动信号的幅值谱表现出较严重的“动率泄露”效应的原因。
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| 关 键 词： | 信号处理 频谱分析 变速机械 幅值谱校正 旋转机械 时变信号 多点平均法 “动率泄露” |
| 修稿时间： | 1999年12月28 |
Amplitude Correction
Approach Using Average of Several Points in Discrete Spectrum for Analyzing the Dynamic
Signal of Rotating Machinery with Varying Speed |
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| Zhu Limin,Xiong Youlun,ZHONG Binglin.Amplitude Correction
Approach Using Average of Several Points in Discrete Spectrum for Analyzing the Dynamic
Signal of Rotating Machinery with Varying Speed[J].Journal of Vibration Engineering,2001,14(1):47-52. |
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| Authors: | Zhu Limin Xiong Youlun ZHONG Binglin |
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| Affiliation: | Zhu Limin 1 Zhong Binglin 2 Xiong Youlun 1 |
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| Abstract: | In the paper, the theory and methodology of amplitude correction method using average of several points in discrete spectrum, which is suitable for analyzing the dynamic signals of rotating machinery with small varying speed, is proposed and systematically studied. It is demonstrated that with this method the accurate amplitude of the signal component with weakly fluctuate frequency, and the averaging amplitude of the signal component with small fluctuation in both frequency and amplitude can be achieved. The serious leakage effect in the amplitude spectrum of a time dependent signal is also qualitatively explained by the proposed theory. |
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| Keywords: | signal processing spectral analysis rotating machinery varying speed time dependent signal |
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