System Identification Modeling of ESD EMP Energy Coupling

With the development of microelectronic technique,the sensitivity of electronic equipment for EMP is increased,and EMP effects simulation of electronic equipment become an important means of EMC design.The ubiquitous problem of EMP effects simulating methods in practice is the complication of computational process.In order to solve this problem,a modeling method of ESD EMP energy coupling based on system identification was brought out.Experiment of different ESD current coupling to semi-circle antenna was designed by using HBM and BMM as ESD simulator circuit separately.The energy coupling channel was taken as black box system and ESD current and semi-circle antenna coupling voltage as input and output signal.In order to improve the precision of ESD energy coupling model,to prevent signal distortion and to retain the high frequency details of ESD signal,the method of wavelet shrinkage de-noising was used to process the measured signal.Based on output error identification algorithm and AIC(Akaika Information Criterion),9 ranks transfer function of energy coupling was obtained by using BMM experiment data.The model was validated by HBM experiment data.The result show that GOF(Goodness of Fit) between theoretical anticipation results and experiment data is 79.53%.This calculation method is a simple,convenient and effective means of engineering simulation modeling,and is suitable in other EMP effect simulation research areas.