An expert system shell for aerospace applications

Prasad, Bandreddi E.; Perraju, T.S.; Uma, G.; Umarani, P.

doi:10.1109/64.336148

Cited by 14 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Allen's theory of temporal intervals has been used often, because it offers flexibility in representing a variety of complex temporal relations (Allen, 1983). Researchers creating working systems, however, acknowledge that restricting the knowledge base to just a few of the interval relations is often desirable in order to reduce the computational complexity of maintaining the network of temporal intervals (Perkins & Austin, 1990;Dorn, 1992;Maloof, 1992;Mylopoulos et al, 1993;Prasad et al, 1994). Temporal representation in other temporal expert systems developed by high-tech corporations remains proprietary.…”

Section: Introductionmentioning

confidence: 99%

Extending CLIPS to support temporal representation and reasoning

Chinn

Madey

1999

Expert Systems

View full text Add to dashboard Cite

Applications using expert systems for monitoring and control problems often require the ability to represent temporal knowledge and to apply reasoning based on that knowledge. Incorporating temporal representation and reasoning into expert systems leads to two problems in development: dealing with an implied temporal order of events using a non-procedural tool; and maintaining the large number of temporal relations that can occur among facts in the knowledge base. In this paper we explore these problems by using an expert system shell, CLIPS (C Language Integrated Production System), to create temporal relations using common knowledge-based constructs. We also build an extension to CLIPS through a user-defined function which generates the temporal relations from those facts. We use the extension to create and maintain temporal relations in a workflow application that monitors and controls an engineering design change review process. We also propose a solution to ensure truth maintenance among temporally related facts that links our temporal extension to the CLIPS facility for truth maintenance.

show abstract