A novel method of top-level EMC design technology for large and complex electronic information systems

This paper presents a novel method of top-level EMC (EMC) design technology for large and complex electronic information systems, such as aircraft. A Numerical Airplane Model (NAM) with EMC effects and Performance Simulation Models (PSM) of electronic-equipments are made. In order to ensure the NAM and PSM correct, the following information should be concerned: the structure of airplane and equipments, the relative locations of equipments, the specification and operation-principles of the electronic-equipments, and the inputs and outputs of the electronic-equipments, etc. The electromagnetic interference matrix (EIM) are build by a novel method, called "field-circuit hybrid method - ECHM". The EIM is the function of bandwidth, sensitivity, polarization, signal characteristics, non-linear of front-and-end, receiver-antenna, radiation power, characteristics off-bandwidth, harmonious, intermodulation, transmitter antenna, location, and attenuation of cables, etc. Based on the ECHM and EIM and EMI/EMS performance, the safety and EMC performance of plane can be predicated. The top-level EMC specification can be set down. The top-level EMC specification can be disassembled to the sub-systems and equipments. The whole-plane EMC can be evaluated and controlled quantificationally. The methods presented in the paper have been applied to 3 kinds of planes. The validity of the above method has be proved.