Then an extension of APF method - stream function is researched.
接着，研究了人工势场法的一种延伸：流函数法。
Then an algorithm based on a simplified sliding-window Fourier is presented in this thesis, which makes calculation of harmonic current in APF simply and detects referenced current effectively.
本文提出了一种基于离散傅立叶变换的滑窗迭代检测算法，该算法能简化计算，实时有效的检测出谐波参考指令电流。
APF then access points al0ng the harmonic current feedback, as a regulator input, adjusted feedforward control error.
再将有源滤波器接入点后的线上电流的谐波分量反馈回来，作为调节器的输入，调整前馈控制的误差。
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