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Starplan: A Model-Based Diagnostic System for SpacecraftThe Sunnyvale Division of Ford Aerospace created a model-based reasoning capability for diagnosing faults in space systems. The approach employs reasoning about a model of the domain (as it is designed to operate) to explain differences between expected and actual telemetry; i.e., to identify the root cause of the discrepancy (at an appropriate level of detail) and determine necessary corrective action. A development environment, named Paragon, was implemented to support both model-building and reasoning. The major benefit of the model-based approach is the capability for the intelligent system to handle faults that were not anticipated by a human expert. The feasibility of this approach for diagnosing problems in a spacecraft was demonstrated in a prototype system, named StarPlan. Reasoning modules within StarPlan detect anomalous telemetry, establish goals for returning the telemetry to nominal values, and create a command plan for attaining the goals. Before commands are implemented, their effects are simulated to assure convergence toward the goal. After the commands are issued, the telemetry is monitored to assure that the plan is successful. These features of StarPlan, along with associated concerns, issues and future directions, are discussed.
Document ID
19900016195
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Dennis Heher
(Ford Aerospace (United States) Dearborn, United States)
Paul Pownall
(Ford Aerospace (United States) Dearborn, United States)
Date Acquired
September 6, 2013
Publication Date
March 1, 1990
Publication Information
Publication: Third Annual Workshop on Space Operations Automation and Robotics (SOAR 1989)
Publisher: National Aeronautics and Space Administration
Subject Category
Computer Programming and Software
Report/Patent Number
NASA-CP-3059
Meeting Information
Meeting: 3rd Annual Workshop on Space Operations Automation and Robotics (SOAR 89)
Location: Houston, TX
Country: US
Start Date: July 25, 1989
End Date: July 27, 1989
Sponsors: National Aeronautics and Space Administration, United States Air Force
Accession Number
90N25511
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.
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