1973-02-01

Acoustic Signature Analysis of Space Program Mechanical Devices 730931

Predominant features of sound signatures can be related back to operational events occurring within components both for normal and failure mode operations. Engineering analysis permits establishment of quantized go, no-go, or caution parameters necessary to make readiness assessment decisions.
The “Structure Borne Acoustics” test technique presented in this paper has outstanding potential for this work. Reliability includes accurate detection and diagnosis of the maximum number of faults, with an absolute minimum false alarm rate. Jet engine-bearing monitoring is one example of successful application.

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