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ODVEC Monitoring System Certified and Deployed in JSC Mission Control Center
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ODVEC Monitoring System Certified and Deployed in JSC Mission Control Center

The Anomaly Monitoring Inductive Software System (AMISS) health-monitoring software running in the International Space Station Flight Control Room (ISS FCR) has been updated with an improved monitoring algorithm: the Outlier Detection Via Estimating Clusters (ODVEC) algorithm. ODVEC, an extension of the Intelligent System Division’s Inductive Monitoring System (IMS), has been certified and installed on the flight control operations machines in the Johnson Space Center Mission Control Center. ODVEC extends the functionality of the IMS monitoring software by comparing real-time telemetry data to a significantly larger sample of baseline nominal system operations data. This comparison provides a more sensitive fault detection capability and monitoring that is less prone to false negatives due to off-nominal data that may have inadvertently been incorporated in the baseline model. Current monitoring of the thermal and attitude control systems in the Station, Power, ARticulation, Thermal, and ANalysis (SPARTAN) and Attitude, Determination, and Control (ADCO) flight control disciplines has been updated to use the new ODVEC algorithm. ISS flight control teams are currently developing additional AMISS system models to expand the AMISS/ODVEC monitoring capability in the ISS flight control room to cover more ISS subsystems.

BACKGROUND: The Inductive Monitoring System is an Ames-developed health-monitoring software application that uses data mining techniques to construct baseline nominal system behavior models by analyzing archived telemetry. IMS then uses these baseline models to identify off-nominal behavior in real-time telemetry, potentially prior to any Caution and Warning (C&W) annunciation for the system. In 2007, IMS-based tools were delivered to JSC that allow ADCO mission controllers to monitor ISS control moment gyroscope (CMG) systems in real time. In subsequent years, the IMS CMG tool was generalized to produce the AMISS tool for use by any flight control discipline. It is now used for real-time flight control room monitoring of twenty-five ISS subsystems, with additional future deployments under development.

NASA PROGRAM FUNDING: JSC Inter-center Task Agreement supported by the ISS program

TEAM MEMBERS: Ilya Avrekh, David Iverson, and Bill McDermott

Contact: David Iverson (ARC), Jason Moesta (JSC)

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