With the increasing application of diagnostic and prognostic technologies within the propulsion system community, there is a need for standardized metrics that can be used by developers and end users alike for assessing the performance of algorithms and systems for diagnosing faults and predicting the future health state of a system. The focus of this document is to introduce a variety of metrics that can be used for this purpose. Originally published in 2020, this document consolidates and expands upon the contents of two previous SAE E-32 Committee documents to create a single comprehensive document on diagnostic and prognostic metrics for Aerospace Propulsion Health Management Systems. The details of the other two documents are as follows:
With the publication of this document, the two superseded documents, AIR4985 and AIR5909, will be cancelled. This document consolidation strategy was agreed to by the SAE E-32 Committee to reduce the number of documents it is required to maintain.
Failure modes and effects analysis
Computer software and hardware
Vehicle health management (VHM)
Also known as: SAE AIR 7999
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