False Alarm Probability Determination for the Honeywell Hexad Fault-Tolerant INS

Daniel P. Johnson

Abstract:	Abstract The Honeywell Fault-Tolerant ADIRU uses six skew-mounted gyros and accelerometers to achieve tkil-opemtional/failoperational/fail-de redundancy. The algorithm for fault detection tests whether a three-dimensional pa&y vector has exceeded a pre- set threshold. False alarm probability calculations for such a system involve the evolution of a three- dimensional stationary stochastic process. This paper presents the derivation of simple bounding formulas for the false alarm probability based on the discrete time version of levelcrossing theory for multi-dimensional random processes, resulting in the setting of thresholds for the Honeywell ADIRU at 10V6 probability of false alarm per hour operation.
Published in:	Proceedings of the 1992 National Technical Meeting of The Institute of Navigation January 27 - 29, 1992 Catamaran Resort Hotel San Diego, CA
Pages:	245 - 252
Cite this article:	Johnson, Daniel P., "False Alarm Probability Determination for the Honeywell Hexad Fault-Tolerant INS," Proceedings of the 1992 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1992, pp. 245-252.
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