This paper describes a knowledge-based troubleshooting consultant called WHEELS, which was developed for use with the Reaction Wheel Assemblies on the NASA Hubble Space Telescope. WHEELS aids the ground station operator in determining the cause of abnormal telemetry readings. The operator may work interactively with WHEELS, answering questions posed by the program, or the program can monitor the telemetry readings automatically and begin a consultation session when any of the readings has exceeded preset limits. WHEELS also calls upon external Pascal procedures which calculate the thermal characteristics of key components. This information is combined with heuristic knowledge obtained from the design expert to draw conclusions about the probable cause(s) of the wayward telemetry. In addition, permanent records in the form of equipment incident logs are kept listing each component examined and the conclusions drawn. These logs are automatically updated upon exiting from WHEELS. This paper focuses on the knowledge representation and reasoning methods used for resolving anomalies on the Space Telescope.


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    Title :

    Knowledge-based analysis of telemetry data on the Hubble Space Telescope


    Additional title:

    Wissensbasierte Analyse von Telemetrie-Daten mit dem Hubble Weltraum-Teleskop


    Contributors:
    Austin, A. (author) / Laffey, T. (author)


    Publication date :

    1987


    Size :

    8 Seiten, 4 Bilder, 15 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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