Accession Number:

ADB030310

Title:

Prediction of Equipment Failure by Acoustical Signature Analysis. Phase II.

Descriptive Note:

Final rept. Feb 77-Jun 78,

Corporate Author:

ABERDEEN PROVING GROUND MD MATERIEL TESTING DIRECTORATE

Personal Author(s):

Report Date:

1978-07-01

Pagination or Media Count:

109.0

Abstract:

Vibration data were gathered from accelerometers mounted on 8V71T diesel engines at Letterkenny Army Depot and US Army Aberdeen Proving Ground. A pattern recognition computer program was tested to see if it could distinguish between the vibration signature of good engines and the vibration signature of faulty engines. Vibration signatures from 24 engines 12 good, 12 faulty were used to train the computer program. The classifier routine produced by the computer program was then tested on the 24 training signatures and 14 mystery signatures 9 good, 5 faulty that it had not seen before. Classification was accomplished with 100 accuracy on the training data and 79 accuracy on the mystery data. Further study indicated, however, that the accuracy of the classifier was not significant when using a training sample this small.

Subject Categories:

  • Computer Programming and Software
  • Acoustics
  • Mechanics
  • Reciprocating and Rotating Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE