StarPlan II: Evolution of an Expert System

Ronald W. Siemens, Marilyn Golden, Jay C. Ferguson

An expert system for satellite anomaly resolution must perform monitoring, situation assessment, diagnosis, goal determination and planning functions in real time. StarPlan is such a system being developed at the Ford Aerospace Sunnyvale Operation. This paper details the evolution of the StarPlan architecture from a rule-based system in which multiple "experts" classified and resolved anomalies to a more generic architecture that utilizes an object model of the domain to perform fault diagnosis using causal reasoning. The StarPlan I architecture is described; the lessons learned in StarPlan I implementation are discussed; and the architecture of StarPlan II is presented.


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