Production Acceptance Testing Using an Improved Acoustic Signature Analysis 730929
This paper presents the composite exceedance method as an alternative to the more costly broadband power spectral density (PSD) analysis which is the standard method of acoustic signature analysis for rotating machinery. The composite exceedance is superior to the PSD analysis in that the computational procedure is straightforward and effective without the use of Fourier Transforms and, therefore, lends itself to simple programming, and the information extracted from the vibration data is represented in one master plot, permitting direct evaluation of all g peak levels encountered in terms of the number of occurrences above which they exceed a given level of acceleration. The sensitivity of anomaly detection by the proposed method has been demonstrated in a number of actual cases, one of which is discussed. The data collection methodology and philosophy of the method as they relate to narrow-band Gaussian random processes are also considered.
Citation: Chen, R., Yokota, F., Allen, D., and Friedericy, J., "Production Acceptance Testing Using an Improved Acoustic Signature Analysis," SAE Technical Paper 730929, 1973, https://doi.org/10.4271/730929. Download Citation
Author(s):
R. P. Chen, F. T. Yokota, D. V. Allen, J. A. Friedericy
Affiliated:
AiResearch Manufacturing Div., The Garrett Corp.
Pages: 10
Event:
National Aerospace Engineering and Manufacturing Meeting
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Acoustics
Vibration
Composite materials
Production
Vehicle acceleration
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »