| 基于SRFFT算法的快速小波变换谐波检测法 |
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| 引用本文： | 刘桂芬,张继华.基于SRFFT算法的快速小波变换谐波检测法[J].辽宁工程技术大学学报(自然科学版),2008,27(1):88-91. |
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| 作者姓名： | 刘桂芬 张继华 |
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| 作者单位： | 辽宁工程技术大学,电气与控制工程学院,辽宁,葫芦岛,125105 |
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| 摘 要： | 为快速准确的提取谐波分量及克服传统的FFT方法无时域局部性的缺点,提出一种基于复序列加窗插值分裂基快速傅里叶变换算法(SRFFT)的快速小波变换谐波检测法,以便准确快速的提取谐波.该方法采用凯瑟窗函数作为窗函数,通过改变β值和采样点数在主瓣宽度与旁瓣衰减之间进行选择;运用SRFFT算法、Mallat算法以及离散小波变换(DWT)算法对信号进行快速分解及重建.模拟分析结果表明,该方法运算精度很高,可以快速准确的提取谐波信号参数.
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| 关 键 词： | 谐波检测 凯瑟窗函数 小波变换 |
| 文章编号： | 1008-0562（2008）01-0088-04 |
| 收稿时间： | 2007-03-23 |
| 修稿时间： | 2007年3月23日 |
Fast wavelet transform harmonic detection method based on SRFFT algorithm |
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| LIU Guifen,ZHANG Jihua.Fast wavelet transform harmonic detection method based on SRFFT algorithm[J].Journal of Liaoning Technical University (Natural Science Edition),2008,27(1):88-91. |
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| Authors: | LIU Guifen ZHANG Jihua |
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| Abstract: | A new kind of method called fast wavelet transform harmonic detection method based on SRFFT algorithm is proposed to reduce the hurdle effect, spectrum leakage and calculation. The Keyser window function is used as window function ,which it can select between main lobe width and side lobe attenuation by changing the 13value and the number of sampling points. It decomposes and rebuilds the signals by using SRFFT algorithm, Mallat algorithm and discrete wavelet transform algorithm. The simulation results show that the method has high operational precision and it can fast and accurately get the harmonic signal parameters. |
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| Keywords: | harmonic detection Keyser window function wavelet transform |
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