Flight Test Results of a DAVI Isolated Platform

Abstract

The report contains the results of a flight test evaluation of the Dynamic Antiresonant Vibration Isolator (DAVI). In this program, three series of tests were conducted for four different weight configurations of a DAVI isolated platform. The first series of tests evaluated the unidirectional DAVI, the second series of tests evaluated the two-dimensional DAVI, and the third series of tests evaluated the three-dimensional DAVI. The test results showed that the unidirectional and the two-dimensional DAVI isolated platforms did not achieve the expected reduction in vibration and, in some conditions, reduction was very poor. However, the reduction of vibration obtained on the three-dimensional DAVI isolated platform was excellent. A comparison of results obtained on the three- dimensional isolated platform and a conventionally isolated platform shows that the three-dimensional DAVI isolated platform had the lower vibration level and was less sensitive to changes in isolated weight or to changes in helicopter rotor speed (excitation frequency).

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1970
Accession Number
AD0880948

Entities

People

  • Robert T. Jones

Organizations

  • Kaman Corporation

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Army Aviation
  • Center Of Gravity
  • Contracts
  • Corporations
  • Directional
  • Environment
  • Flight Testing
  • Fourier Analysis
  • Frequency
  • Governments
  • Helicopter Rotors
  • Instrumentation
  • Resonant Frequency
  • United States
  • Vibration
  • Vibration Isolators
  • Virginia

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