Approach to acquiring quantitative and qualitative knowledge for fault diagnosis.

摘要

Operation and maintenance activities associated with complex systems require knowledge of the physical system and knowledge of the cognitive task. This paper discusses our methodology for acquiring physical process knowledge necessary for reasoning about faults. Acquisition of process knowledge used in fault diagnosis consists of (1) problem definition and (2) model development. Problem definition activity determines the constraints, physics, physical structure, function, and fault cases associated with the physical system. Model development activity builds knowledge models via fault-case analysis and qualitative analysis. We discuss problem definition and model development activities in context of a single-pass heat exchanger. 6 refs., 4 figs., 3 tabs.