The Application Of Expert System In The Study Of EMC Common Technology

This dissertation analyses and designs an EMC technique supporting expert system based on the research background of "Common Technology of CPU Controller and its Expert System " led by Hebei Province Nature Found. The main research contents include the research on common technology, the design of system project and knowledge database system and the development of prototype system.Firstly, the technique resources on EMC are collated and associated systematically and a consistent knowledge database system is constructed. For the object of "Typical Household Appliance", four subjects are shown particularly, they are: electrical source, ground line, electromotor and PCB. Each item is introduced by its reason and its settlement, which proves the particular and consecution of the knowledge database system.The development of the prototype system can reflect the application effectiveness of the ultimate system. The SQL Server relation database technology and Delphi 7 data development powerful function are adopted directly in the prototype system which conforms to the primary system design project. The application are finished and made up of five subsystems: EMC Introduction, EMC standard, EMC Testing, EMC Design and EMC forecasting. Now all these subsystems are put into use. The data can be refreshed by user and network query function is expanded.The research and development of this system exerts the advantage of ES consequence structure, and resolves EMC complex problem. The EMC forecasting subsystem can solve EMC problem in design period. Thereby, this method can reduce the cost and improve components' ability of resisting disturb. Especially, the explanation of the EMC Common Technology makes the EMC problem easier, and is helpful to those who are not experts in EMC research filed.