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Exhaustive Thresholds and Resistance CheckpointsOnce deployed, all intricate systems that operate for a long time (such as an airplane or chemical processing plant) experience degraded performance during operational lifetime. These can result from losses of integrity in subsystems and parts that generally do not materially impact the operation of the vehicle (e.g., the light behind the button that opens the sliding door of the minivan). Or it can result from loss of more critical parts or subsystems. Such losses need to be handled quickly in order to avoid loss of personnel, mission, or part of the system itself. In order to manage degraded systems, knowledge of its potential problem areas and the means by which these problems are detected should be developed during the initial development of the system. Once determined, a web of sensors is employed and their outputs are monitored with other system parameters while the system is in preparation or operation. Just gathering the data is only part of the story. The interpretation of the data itself and the response of the system must be carefully developed as well to avoid a mishap. Typically, systems use a test-threshold-response paradigm to process potential system faults. However, such processing sub-systems can suffer from errors and oversights of a consistent type, causing system aberrant behavior instead of expected system and recovery operations. In our study, we developed a complete checklist for determining the completeness of a fault system and its robustness to common processing and response difficulties.
Document ID
20090015871
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Easton, Charles
(Boeing Aerospace Co. Huntington Beach, CA, United States)
Khuzadi, Mbuyi
(Boeing Aerospace Co. Huntington Beach, CA, United States)
Date Acquired
August 24, 2013
Publication Date
September 22, 2008
Publication Information
Publication: 25th Space Simulation Conference. Environmental Testing: The Earth-Space Connection
Subject Category
Engineering (General)
Distribution Limits
Public
Copyright
Public Use Permitted.

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