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引用次数: 0
摘要
数字链是一种自适应有限脉冲响应滤波器(FIR)。阶数为N的FIR滤波器由(N-1)个延时元件、加法器和滤波系数w(N)组成。基于ZLoad电压中测量到的谐波，使用Filtered x Least Mean Square (FxLMS)算法调整滤波器系数[2]。FxLMS是一种随机梯度下降法，通过将滤波器系数更新为w(n +1) = w(n) + μe(n)x(n)来产生检测到的谐波的最小均方差。
Control of a hybrid filter topology for the reduction of high frequency harmonics
The Digital Chain is realized as an adaptive finite impulse response filter (FIR). FIR filters with the order of N consist of (N-1) time delay elements, adder and filter coefficients w(n). Based on the measured harmonics in the voltage of ZLoad the filter coefficients are adjusted using the Filtered x Least Mean Square (FxLMS) algorithm [2]. The FxLMS is a stochastic gradient descent method producing the least mean squares of the detected harmonics by updating the filter coefficients with the given formula: w(n +1) = w(n) + μe(n)x(n).
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