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基于递归预测误差原理,研究了用来估计谐波中基波频率和增强谐波的方法,并由此设计了一种具有任意的窄带性能和预期形状的均匀切口的自适应谐波增强或陷波滤波器.由于算法非线性部分只涉及基波频率一个参数,使算法很易用于具有高次谐波的过程.而且由于利用了可变极点半径和忘却因子(for-gettingfactor)因而算法对谐波频率的敏感性强,收敛速度快,并能跟踪频率时变的信号.
Based on the principle of recursive prediction error, the method used to estimate the fundamental frequency and harmonics in the harmonic is studied, and a uniform notch adaptive harmonic enhancement with any narrowband performance and expected shape is designed Wave filter. Because the non-linear part of the algorithm involves only one parameter of the fundamental frequency, the algorithm is easy to use for processes with higher harmonics. And because of the use of variable pole radius and for-gettingfactor, the algorithm is more sensitive to harmonic frequency, faster in convergence and can track the time-varying signal.