A Microprocessor-Based Gradient Analyser for F/A-18 Bulkhead Spectrum Loading

Abstract

This report describes a specially designed instrument that was used during a full scale fatigue test of an F/A-18 bulkhead to support the acquisition and analysis of acoustic emission (AE) data for the investigation of crack initiation and growth. This device, developed by the author, comprises both hardware and software and generates binary data in real time that indicates the sign of the gradient of an applied spectrum load signal. This design overcomes the inherent limitations of conventional analog slope detection methods applied to slowly varying aperiodic waveforms.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1997
Accession Number
ADA335353

Entities

People

  • Leopold Sponder

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Advanced Electronics
  • C4I
  • Energy and Power Technologies
  • Engineered Resilient Systems
  • Space

DTIC Thesaurus Topics

  • Acquisition
  • Airframes
  • Bulkheads
  • Central Processing Units
  • Computer Programming
  • Computers
  • Converters
  • Engineering
  • Frequency
  • Language
  • Machine Languages
  • Microprocessors
  • Photographs
  • Photography
  • Spectra
  • Time Intervals
  • Universities

Readers

  • Computer Science.
  • Radio communications and signal processing.
  • Structural Health Monitoring of Composite Structures.