时变谐波参数检测

Time-varying harmonic Parameters detection based on interpolating-FFT and adaptive linear combiner

本文以自适应线性组合器为基础,采用递归最小二乘法进行时变谐波参数的跟踪检测。当信号的基波频率发生变化时,采用分段检测的思想,对每小段信号先采用插值快速傅立叶变换法检测该段基波频率,作为自适应线性组合器的输入,然后采用递归最小二乘法进行幅度和相位的跟踪检测。该方法利用递归最小二乘法跟踪速度快的特点,实现了时变谐波的快速跟踪检测。实验结果验证了所提方法的有效性和准确性。

A method based on adaptive linear combiner（Adaline） and recursive least square（RLS） was proposed to track parameters of time-varying harmonics in the paper.When the base frequency of signal is varied,the subsection means is used.Firstly,the base frequency of segment signal is estimated by interpolation FFT and used as the input of Adaline.Then,RLS algorithm is implemented to track amplitude and angle of harmonics.The fast tracking speed of RLS algorithm makes the fast tracking of time-varying parameters become possible.The results from test validate that the proposed method is effective and accurate.