Accession Number:

ADA073553

Title:

Investigation of Advanced Prognostic Analysis Techniques.

Descriptive Note:

Final rept.,

Corporate Author:

NORTHROP RESEARCH AND TECHNOLOGY CENTER PALOS VERDES PENINSULA CA

Personal Author(s):

Report Date:

1979-06-01

Pagination or Media Count:

261.0

Abstract:

This report presents the results of an experimental program with the following objectives to collect and process test data from six different UH-1 helicopter 90 degree gearboxes, tested for a total of 4712 hours under controlled conditions, and to perform a theoretical investigation and data analysis to develop and optimize trend detection and prediction algorithms for application to the processed test cell data in order to establish valid predictions of gearbox failure time. A variety of sensors were used to monitor the wear occurring in the gearboxes including oil debris monitors, accelerometers, a shock pulse analyzer, and temperature sensors. Spectrometric oil analyses of the gearbox oil were performed on daily samples from the gearbox oil reservoir. The gearboxes were disassembled and inspected for wear prior to and following each test. Wear measurement techniques included visual inspection by an expert, measurements of ball and ball track wear, dynamic noise testing of bearings, and scanning electron microscope photographs of the surface of one ball from each bearing.

Subject Categories:

  • Helicopters
  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE