To enhance the quality of manufacturing as responsibility, build national brand of measurement!
To enhance the quality of manufacturing as responsibility, build national brand of measurement!
分数次谐波也称间谐波，分数次谐波的运算还是采用傅里叶变换，需要注意的是，傅里叶窗口长度必须是信号周期的整数倍，倍数越大，频率的分辨率越高。
举例：
信号周期为T，取傅里叶窗口长度为nT，这样，傅里叶输出的第m个数的模就是m/n次谐波，也就是分数次谐波。
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China's leading enterprise in variable frequency power measurement and metering
National variable frequency power measuring instrument (metering station) founder
Research and development unit of national variable frequency power metering standard