基于带通滤波器频响的电磁干扰信号生成技术

EMI Signal Generation Technology based on Frequency Response of Band Pass Filter

提出了一种背景电磁干扰信号的生成技术,可应用于研究电磁影响效应的半实物仿真工程。该技术基于带通滤波器的频率响应,采用频谱代换的方法,通过进行带通滤波器的综合求解其脉冲响应,进而得到背景电磁干扰信号的等效时域波形,此时域波形能够较好地符合背景电磁干扰信号的部分频域分布特征和部分频谱信息。该技术在一定条件和一定范围内,有效满足了半实物仿真过程中对未知电磁干扰信号时域波形的需求。

A technique that can be applied to the semi-physical simulation engineering to study the electromagnetic effect is proposed for generating background EMI signals. Based on frequency response of band pass filter and adopting the method of spectrum substitution and designing the band pass filter, the technique solves the impulse response of the band pass filter and obtains the equivalent time-domain waveform of the background electromagnetic interference signal. The time-domain waveform can better match the partial frequency distribution characteristics and the partial spectrum information of background EMI signal. The technique satisfies the requirement of time-domain waveform of unknown EMI signal in the process of semi-physical simulation under certain conditions and within a certain range.