Synchronous Averaging of Helicopter Tail Rotor Gearbox Vibration: Phase Reference Considerations.

Abstract

Synchronous averaging requires an accurate phase reference (tachometer) signal. In helicopter transmissions, such a signal can usually be obtained or derived from an engine or main rotor gearbox accessory, but is not as readily available for the tail rotor gearbox. This report examines whether a separate tail rotor gearbox phase reference signal is necessary by investigating the relative jitter, due to dynamic tail drive shaft twist, between phase reference signals obtained from the main and tail rotor gearboxes in a S7OA-9 Black Hawk helicopter.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1998
Accession Number
ADA360600

Entities

People

  • D. M. Blunt

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acquisition
  • Aerial Warfare
  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Computers
  • Data Acquisition
  • Drive Shafts
  • Engineering
  • Frequency
  • Helicopter Rotors
  • Mathematical Models
  • Mechanical Engineering
  • Probability Density Functions
  • Rotary Wing Aircraft
  • Tail Rotors
  • Universities

Readers

  • Aerodynamics.
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Fault Tolerant Diagnosis of Black and White Balloon Isolation Tests Using ¥.