Modeling of Circuit Pulse Response Based on System Identification
Liu Wei-chao · Telecommunication Engineering · 2011
In order to study the new methods of electromagnetic pulse effects simulation based on system identification,the pulse injection experiment of regulated power supply is designed with step signals and square wave pulse as drive sources.The pulse energy coupling transfer function of circuit system is modeled by OE(Output Error) model and NARX(Nonlinear Autoregressive Network with Exogenous Inputs) Neural Network.As a result,both of the models can predict the response wave shapes well,and the predictive ability of the NARX model is better than that of OE model.The goodness-of-fit on the step signal and square wave pulse response wave shapes,predicted by NARX model,is as high as 93.0% and 67.4%,and that predicted by OE model is 76.0% and 61.4%.The simulation results prove the effective application of system identification in electromagnetic pulse response prediction of the circuit.It offers a simple and effective simulating method for electromagnetic protection and design.