Mr. Scott Poll Profile

Scott Poll

Aerospace Engineer at NASA Ames Research Ctr

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Proceedings Article | 8 August 2003 Paper

Characterization of model-based reasoning strategies for use in IVHM architectures

Scott Poll, David Iverson, Ann Patterson-Hine

Proceedings Volume 5107, (2003) https://doi.org/10.1117/12.487219

KEYWORDS: Systems modeling, Switches, Sensors, Diagnostics, Model-based design, Data modeling, Combustion, Rockets, Failure analysis, Mathematical modeling

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Open architectures are gaining popularity for Integrated Vehicle Health Management (IVHM) applications due to the diversity of subsystem health monitoring strategies in use and the need to integrate a variety of techniques at the system health management level. The basic concept of an open architecture suggests that whatever monitoring or reasoning strategy a subsystem wishes to deploy, the system architecture will support the needs of that subsystem and will be capable of transmitting subsystem health status across subsystem boundaries and up to the system level for system-wide fault identification and diagnosis. There is a need to understand the capabilities of various reasoning engines and how they, coupled with intelligent monitoring techniques, can support fault detection and system level fault management. Researchers in IVHM at NASA Ames Research Center are supporting the development of an IVHM system for liquefying-fuel hybrid rockets. In the initial stage of this project, a few readily available reasoning engines were studied to assess candidate technologies for application in next generation launch systems. Three tools representing the spectrum of model-based reasoning approaches, from a quantitative simulation based approach to a graph-based fault propagation technique, were applied to model the behavior of the Hybrid Combustion Facility testbed at Ames. This paper summarizes the characterization of the modeling process for each of the techniques.

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