Programming expert systems in OPS5: an introduction to rule-based programming
Programming expert systems in OPS5: an introduction to rule-based programming
Building expert systems
Expert systems: perils and promise
Communications of the ACM
Learning, development, and production systems
Production system models of learning and development
Human Problem Solving
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On line data management techniques to certify spacecraft information are mandated by increasing telemetry rates [SiC87]. Knowledge-based expert systems offer the ability to certify data electronically without the need for time consuming human interaction. We have explored issues of automatic certification by designing a knowledge-based expert system to certify data from a scientific instrument, the Orbiter Ultraviolet Spectrometer (OUVS), on an operating NASA planetary spacecraft, Pioneer Venus (PV) [Ste80]. The resulting rule-based system, called PVDaCS (Pioneer Venus Data Certification System), is a functional prototype demonstrating the concepts of a larger system design. A key element of the system design is the representation of an expert's knowledge through the usage of well ordered sequences. PVDaCS produces a certification value derived from expert knowledge and an analysis of the instrument's operation. Results of system performance are presented.