| 基于归一化幅频系数的模态混叠解决方法 |
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| 引用本文： | 林丽,周霆,余轮. 基于归一化幅频系数的模态混叠解决方法[J]. 计算机工程, 2010, 36(5): 263-265 |
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| 作者姓名： | 林丽 周霆 余轮 |
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| 作者单位： | 福州大学物理与信息工程学院,福州,350002 |
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| 基金项目： | 国家自然科学基金重点仪器专项基金资助项目(60827002);;福建省教育厅基金资助项目(JA08006) |
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| 摘 要： | 针对在经验模态分解的过程中由于间断信号造成的模态混叠问题，提出利用对信号作经验模态分解得到的第1个固有模态函数的瞬时频率和幅度定义归一化幅频系数，分离出间断信号。实验结果证明，该方法可以克服间断信号对后续经验模态分解的影响，将间断信号分离为一个固有模态函数。
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| 关 键 词： | 希尔波特-黄变换 经验模态分解 模态混叠 间断信号 |
| 修稿时间： | |
Method for Solving Mode Mixing Based on Normalized Amplitude-frequency Coefficient |
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| LIN Li,ZHOU Ting,YU Lun. Method for Solving Mode Mixing Based on Normalized Amplitude-frequency Coefficient[J]. Computer Engineering, 2010, 36(5): 263-265 |
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| Authors: | LIN Li ZHOU Ting YU Lun |
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| Affiliation: | (College of Physics and Information Engineering, Fuzhou University, Fuzhou 350002) |
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| Abstract: | Aiming at the mode mixing problem caused by intermittency signal in the sifting process of Empirical Mode Decomposition(EMD), this paper proposes a new method that can separate the intermittency signal by normalized amplitude-frequency coefficie which is defined by the instantaneous frequency and amplitude of the first Intrinsic Mode Function(IMF). The results indicate that the influence of intermittency signal is removed in the following empirical mode decomposition and the intermittency signal can be decomposed into one intrinsic mode function. |
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| Keywords: | Hilbert-Huang Transform(HHT) Empirical Mode Decomposition(EMD) mode mixing intermittency signal |
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