According to the characteristics of the large equipment, electromagnetic interference, using neural network method is put forward a set of for large electronic equipment electromagnetic coupling and interference, the analysis of the expert system based on the large electronic equipment as analysis object, the common interference on the interference classification and coding, the BP neural network is constructed, using neural network, the inference mechanism of expert system for the optimization design, and test verification.

Through the study of vehicle work mechanism of the large electronics devices，In view of the interference between vehicles and between different equipment of the same car ，the mathematical model of EMC system of the transmitters and receivers are established the.and applied to on-board equipment. The experimental results show that the system can effectively restrain interference signals of on-board equipment，ensuring the reliable operation of vehicle equipment.