Diagnostic and Prognostic Metrics for Engine Health Management Systems

Scope:

This SAE Aerospace Information Report (AIR) presents metrics for assessing the performance of diagnostic and prognostic algorithms applied to Engine Health Management (EHM) functions. This document consolidates and expands upon the metric information previously contained in AIR4985 and AIR5909. The emphasis is entirely on metrics and as such is intended to provide an extension and complement to such documents as ARP4176, which provides insight into how to create a cost benefit analysis to determine the justification for implementing an EHM system.

Rationale:

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 specific software algorithms for detection and isolation of faults, and predicting remaining useful life. The focus of this document is to introduce a variety of metrics that can be used for this purpose.

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