Monitoring of International Space Station Telemetry Using Shewhart control charts
Lyndon B. Johnson Space Center, Houston, Texas (United Space Alliance for Johnson Space Center)
Source:
ntrs.nasa.gov
Material prepared by: Scientific Director of the AQT Center
Sergey P. Grigoryev
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This method can be applied to monitoring critical systems such as power generation and process equipment.
Shewhart control charts have been applied as a useful method for analyzing the dynamics of data deviations to identify subsystem anomalies once such a representation exceeds a statistically established level.
Additionally, this leading indication tool integrates a methodology that reduces false signals while optimizing true signals, reduces data request cycles, and addresses human factors issues. This innovation uses Statistical Process Control (SPC) and provides a relatively simple way for flight controllers to focus their attention on statistically significant system changes that could lead to abnormal situations. Finally, it allows additional time to prepare a response to potential equipment damage and/or crew injury, thereby increasing spaceflight safety.
This work was prepared by Jeffrey T. Fitch, Alan L. Simon, John A. Gouveia, Andrew M. Hillin and Steve A. Hernandez of the United Space Alliance for Johnson Space Center. MSC-24530-1