NAVARES (NAVSTAR Anomaly Resolution Expert System): A Prototype Expert System for NAVSTAR Anomaly Resolution
Abstract
The operational NAVSTAR Global Positioning System (GPS) satellite constellation must meet the challenge posed by on-orbit anomalies without the extensive contractor support. The objective of this research was to demonstrate the ability of expert systems to maintain corporate knowledge, air experienced satellite engineers, and take advantage of the economies of scale possible by developing the system for a many satellite constellation. NAVARES, the NAVSTAR Anomaly Resolution Expert System, is a rule-based expert system prototype that successfully diagnosis many anomalies in the Attitude, Velocity and Control Subsystem, and the Electrical Power Subsystem of the NAVSTAR satellites. Anomaly Resolution heuristics and procedures are represented in the knowledge base with rules and procedural code. The user interacts with NAVARES by answering system queries about the status of subsystem components. NAVARES uses its expert knowledge to diagnose the satellite anomaly and recommend a remedy. The output consists of the diagnosis, remedy, and titles of relevant past anomaly reports.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1987
- Accession Number
- ADA189491
Entities
People
- Michael A. Rampino
Organizations
- Air Force Institute of Technology