Model-Based Sensor Selection for Helicopter Gearbox Monitoring

Abstract

A new methodology is introduced to quantify the significance of accelerometers for fault diagnosis of helicopter gearboxes. The basis for this methodology is an influence model which represents the effect of various component faults on accelerometer readings. Based on this model, a set of selection indices are defined to characterize the diagnosability of each component, the coverage of each accelerometer, and the relative redundancy between the accelerometers. The effectiveness of these indices is evaluated experimentally by measurement fault data obtained from an OH-58A main rotor gearbox. These data are used to obtain a ranking of individual accelerometers according to their significance in diagnosis. Comparison between the experimentally obtained rankings and those obtained from the selection indices indicates that the proposed methodology offers a systematic means for accelerometer selection.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1996
Accession Number
ADP010194

Entities

People

  • David G. Lewicki
  • Keming Wang
  • Kourosh Danai
  • Vinay B. Jammu

Organizations

  • University of Massachusetts Amherst

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Accelerometers
  • Ball Bearings
  • Bearings
  • Detection
  • Detectors
  • Experimental Data
  • Frequency
  • Helicopters
  • Losses
  • Measurement
  • Mechanical Engineering
  • Military Research
  • Monitoring
  • Piezoelectric Accelerometers
  • Redundancy
  • Test And Evaluation
  • Vehicles

Readers

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