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Prognostics for Ground Support Systems: Case Study on Pneumatic ValvesPrognostics technologies determine the health (or damage) state of a component or sub-system, and make end of life (EOL) and remaining useful life (RUL) predictions. Such information enables system operators to make informed maintenance decisions and streamline operational and mission-level activities. We develop a model-based prognostics methodology for pneumatic valves used in ground support equipment for cryogenic propellant loading operations. These valves are used to control the flow of propellant, so failures may have a significant impact on launch availability. Therefore, correctly predicting when valves will fail enables timely maintenance that avoids launch delays and aborts. The approach utilizes mathematical models describing the underlying physics of valve degradation, and, employing the particle filtering algorithm for joint state-parameter estimation, determines the health state of the valve and the rate of damage progression, from which EOL and RUL predictions are made. We develop a prototype user interface for valve prognostics, and demonstrate the prognostics approach using historical pneumatic valve data from the Space Shuttle refueling system.
Document ID
20110012185
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Daigle, Matthew
(California Univ. Santa Cruz, CA, United States)
Goebel, Kai
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 25, 2013
Publication Date
March 29, 2011
Subject Category
Quality Assurance And Reliability
Report/Patent Number
ARC-E-DAA-TN2953
Meeting Information
Meeting: Infotech at Aerospace 2011
Location: St. Louis, MO
Country: United States
Start Date: March 29, 2011
End Date: March 31, 2011
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NAS2-03144
Distribution Limits
Public
Copyright
Public Use Permitted.
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