This method interpolates the data sequences sampled in fixed frequency by Hermite, so the synchronization formula based on Hermite interpolation is derived and the synchronous sampled data sequences is obtains, the harmonics measurement is carried out by FFT. 该方法对由固定采样频率采得的离散序列进行Hermite插值,推导出基于Hermite插值的同步化公式,从而获得针对当前实际信号的同步采样序列,然后通过快速傅立叶变换进行谐波测量。