A behavioral simulation method to predict and estimate EMC grey system

To solve the common problem that analytic function and testing data could not be used to design a system-class EMC model, an behavioral system model based on grey theory is presented. This paper put forward a rapid calculation and model design method: Analyzed the harmonics component and broadband component of testing data of a EMI device, using grey theory to calculate grey analytic function of harmonics component and broadband component, building EMI grey behavioral model to simulate and analyse system-class EMC problem. The method was verified by an example under criterion of least squares, relevance of testing data and analytic function was computed. It is shown that the means is highly effective and accurate.