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Applying Model-Based Diagnosis to a Rapid Propellant Loading System (Postprint)
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION COCOA BEACH FL JOHN F KENNEDY SPACE CENTER
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The overall objective of the U.S. Air Force Research Laboratory AFRL Rapid Propellant Loading RPL Program is to develop a launch vehicle, payload and ground support equipment that can support a rapid propellant load and launch within one hour. NASA Kennedy Space Center KSC has been funded by AFRL to develop hardware and software to demonstrate this capability. The key features of the software would be the ability to recognize and adapt to failures in the physical hardware components, advise operators of equipment faults and workarounds, and put the system in a safe configuration if unable to fly. In December 2008 NASA KSC and NASA Ames Research Center ARC demonstrated model-based simulation and diagnosis capabilities for a scaled-down configuration of the RPL hardware. In this paper we present a description of the model-based technologies that were included as part of this demonstration and the results that were achieved. In continuation of this work we are currently testing the technologies on a simulation of the complete RPL system. Later in the year, when the RPL hardware is ready, we will be integrating these technologies with the real-time operation of the system to provide live state estimates. In future years we will be developing the capability to recover from faulty conditions via redundancy and reconfiguration.
APPROVED FOR PUBLIC RELEASE