| 现代谱分析在识别脉动信号中的应用 |
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| 引用本文： | 朱长春,何彩英.现代谱分析在识别脉动信号中的应用[J].强度与环境,1999(4):58-63. |
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| 作者姓名： | 朱长春 何彩英 |
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| 作者单位： | 西安交通大学机械结构强度与振动国家重点实验室!西安，710049 |
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| 摘 要： | 功率谱密度被广泛地应用于分析平稳时间序列，随着现代谱分析技术的发展，经典谱分析技术的缺点得到解决。本文对现代谱分析技术的特点作了论述，利用最大熵谱法分辨率高，特别适用于短数据序列及低信噪比弱信号的特点。通过对几组实测的地脉动响应数据的对比分析，获得了信号的功率话密度（PSD），借助PSD识别出结构的模态频率，而用经典谱方法无法获得。
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| 关 键 词： | 谱分析 微脉动 脉冲响应 时序分析 |
Identifying the Pulsating Response Using Modern Spectral Analysis |
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| Zhu Changchun ,He Caiying, Li Hong, Zhang Jinghui.Identifying the Pulsating Response Using Modern Spectral Analysis[J].Structure & Environment Engineering,1999(4):58-63. |
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| Authors: | Zhu Changchun He Caiying Li Hong Zhang Jinghui |
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| Abstract: | Power Spectral Density (PSD) is widely used to analysis the stationary time series. Manyproblems of classical spectral analysis have been solved with the development of modern spectral analysis.The features of modern spectral analysis, which has high resolution and accurate results in case of especial-ly short data corrupted by noise or contaminated with an interfering signal, is described in this paper. PSDof experimental pulsating response is obtained by use of maximum entropy spectral method. Then themodal frequencies of structure are identified under PSD obtained. |
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| Keywords: | Spectrum analysis Micropulation Pulse response Time series analysis |
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