Process Control Using a Real Time Expert System

Abstract The challenges and status of the application of expert system technology in process plants is considered. In particular the problems of knowledge representation include the need to represent dynamic qualitative knowledge, dynamic analytic knowledge and the deep structure of the process. The application of Inference In real-time requires paradigms which use metaknowledge to focus the Inferenclng resources of the expert system. Finally the application of truth maintenance requires a temporal model of the time dependence of the truth of data and Inferred results. A structure which includes these considerations is presented.

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