| FFT谱连续细化分析的富里叶变换法 |
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| 引用本文： | 刘进明,应怀樵.FFT谱连续细化分析的富里叶变换法[J].振动工程学报,1995,8(2):162-166. |
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| 作者姓名： | 刘进明 应怀樵 |
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| 作者单位： | 北京东方振动噪声研究所 |
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| 摘 要： | 本文提出了利用富里叶变换对ＦＦＴ谱的局部进行细化分析的方法。在细化频谱分析时，可以得到某个主要频率成份频率、幅值、相位的精确值，极大地提高频率分辨力，对瞬态及恒定采样长度信号的频率细化分析十分有效。
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| 关 键 词： | 频率 分辨力 频谱分析 富里叶变换 FFT谱 |
Zoom FFT Spectrum by Fourier Transform |
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| Liu Jinming,Ying Huaiqiao.Zoom FFT Spectrum by Fourier Transform[J].Journal of Vibration Engineering,1995,8(2):162-166. |
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| Authors: | Liu Jinming Ying Huaiqiao |
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| Abstract: | In this paper we zoom some regions of FFT spectrum by the Fourier transform,get the precise value of some main frequency, and thus greatly improve the frequency discrimination of FFT spectrum. By this method, a duplicate frequency may also discriminate against the single frequency. |
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| Keywords: | frequency discrimination Fourier transform spectral analysis FFT |
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