基于系统辨识的电子设备建模及其应用

摘要

基于实验数据,对于可测量的电磁干扰,利用系统辨识理论提出了一种为电子设备干扰建模的新方法,较好地解决了以往在为电子设备内部电路建模过程中遇到的模型精度和复杂程度之间的矛盾.并将该仿真模型应用于滤波器参数的优化设计中,使得对于结构已经确定的滤波器,能在其允许的误差范围内,考虑其元件寄生参数的情况下,进行滤波器参数的优化设计.从而弥补了以往对于可测量的电磁干扰,在进行电磁敏感性仿真分析和滤波器的设计时只以实验为主、缺乏系统仿真指导及其验证的缺陷.%For the measurable electromagnetic interference, supported by experimental data and based on the system identification, a new modeling approach for the interference of electronic devices is presented. It solves the contradiction between model's complexity and accuracy, which exists in the traditional process of modeling the internal circuits of electronic devices. The parameters of filter with designed structure can be optimized by this new model with tolerant error range, and the parasitic parameters of electronic components can be considered at the same time. Therefore this modeling method makes up the drawbacks of the previous electromagnetic susceptibility (EMS) analysis and filter design mainly relies on substantial experiments but lacks system simulation analysis.