On-Line Impact Identification of Composite Structures Using Built-In Piezoelectrics

Abstract

A method is introduced to identify an unknown impact on a composite plate. The identification includes the impact location and force time history. A distributed piezoelectric sensor array measures the plate response to the impact. An optimization technique solves the identification problem. The technique identifies the impact by comparing the calculated model response to the measured response. The identification method was implemented in the computer code IDIMPACT. To verify the identification system, many impacts were distributed on a 36-inch by 30-inch composite plate with a distributed surface-mounted piezoelectric sensors. The code proved to be a reliable and accurate identification system. The average error in the reported impact was .56 inch, and the average error in the energy of the force reconstruction was 15%.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 18, 1997
Accession Number
ADA329708

Entities

People

  • Fu-Kuo Chang
  • Michael J. Tracy

Organizations

  • Stanford University

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Basic Programming Language
  • Boundary Value Problems
  • Composite Materials
  • Composite Structures
  • Computers
  • Coordinate Systems
  • Data Acquisition
  • Detectors
  • Experimental Data
  • Figure Of Merit
  • Frequency
  • Geometry
  • Identification Systems
  • Inverse Problems
  • Operating Systems
  • Piezoelectric Sensors
  • Two Dimensional

Fields of Study

  • Engineering

Readers

  • Explosive Engineering.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Software Engineering.