CC/C-130J Human Vibration Investigation: Synchrophaser Effects

Abstract

The purpose of this investigation was to evaluate the effects of several synchrophaser settings on human vibration transmission in the cabin of the CC-130J and C-130J aircraft. The investigation supported the Air Force Flight Test Center (AFFTC) and the Air Systems Command Global Reach Special Programs Office, C-130 Development System Office (ASC/GRB). The synchrophaser settings included OFF (no synchrophaser), DEF (default synchrophaser setting), OPT 1 (option 1 synchrophaser setting) and OPT 2 (option 2 synchrophaser setting). Triaxial acceleration measurements were made on the troop seat pan and on the floor beneath the seat for the right, center, and left seat locations in the vicinity of the propeller plane, and at seat locations just forward of the troop doors (CC-130J only). Six passengers participated in the study, providing vibration data for a statistical analysis of synchrophaser setting effects. The OPT 2 synchrophaser setting provided the most effective mitigation of the highest seat pan vibration associated with the blade passage frequency, but had little effect in reducing the substantial floor vibration. The effects on human comfort perception were inconclusive.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2005
Accession Number
ADB315705

Entities

People

  • Jeanne A. Smith
  • Suzanne D. Smith

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Aircrafts
  • Altitude
  • Engineering
  • Frequency
  • Frequency Bands
  • Government Procurement
  • Governments
  • Measurement
  • Military Research
  • Passengers
  • Perception
  • Propellers
  • Standards
  • Statistical Analysis
  • Test And Evaluation

Readers

  • Aviation Science / Aeronautics.
  • Economics
  • Gender and Food Studies