基于改进余弦窗的加窗插值FFT谐波分析
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李志刚,汪涛,何怡刚,何威,苏圆圆
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Harmonic Analysis Based on an Enhanced Cosine-Window Interpolation FFT Algorithm
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Zhigang Li,Tao Wang,Yigang He,Wei He,Yuanyuan Su
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表3 频率分析结果对比
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| 基波 | 3次谐波 | 5次谐波 | 7次谐波 | 9次谐波 | 5.5次谐波 | 6.5次谐波 | | 理论值 | 50 | 150 | 250 | 350 | 450 | 275 | 325 | | Hanning窗 | 49.998 6 | 149.960 2 | 249.992 2 | 350.007 8 | 449.996 9 | 274.998 6 | 325.006 3 | | Blackman窗 | 49.999 0 | 149.978 9 | 249.993 0 | 350.007 0 | 449.998 4 | 274.999 2 | 325.003 1 | | 改进余弦窗 | 49.999 2 | 149.982 2 | 249.993 7 | 350.006 6 | 449.998 6 | 274.999 6 | 325.002 3 |
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