Analysis of Vibration Data from WHL (Westland Helicopters Ltd) Wessex Fatigue Test Trial 3.

Abstract

Broad band and narrow band enhancement and demodulation techniques are applied to the analysis of the signal averages of the vibration of the input spiral bevel pinion in a Wessex helicopter gearbox measured during a fatigue test. It is shown that the narrow band enhancement technique may be more sensitive to the presence of a crack in the gear than the broad band technique. It is confirmed that, As the affected teeth mesh, A phase lag in the vibration is produced which may be detected by narrow band demodulation. Keywords: Gearboxes; Helicopters; Signal averaging; Condition monitoring; Australia.

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1986
Accession Number
ADA176208

Entities

People

  • P. D. Mcfadden

Tags

DTIC Thesaurus Topics

  • Australia
  • Demodulation
  • Fatigue Tests (Mechanics)
  • Helicopters
  • Monitoring
  • Vibration

Readers

  • Radar Systems Engineering.
  • Spectroscopy.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).