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Impedance-Based Structural Health Monitoring for Aerospace Applications

Structural Technology

Structural Health Monitoring (SHM)

  1. Gyuhae Park1,
  2. Charles R. Farrar1,
  3. Daniel J. Inman2

Published Online: 15 DEC 2010

DOI: 10.1002/9780470686652.eae190

Encyclopedia of Aerospace Engineering

Encyclopedia of Aerospace Engineering

How to Cite

Park, G., Farrar, C. R. and Inman, D. J. 2010. Impedance-Based Structural Health Monitoring for Aerospace Applications. Encyclopedia of Aerospace Engineering. .

Author Information

  1. 1

    Los Alamos National Laboratory, The Engineering Institute, Los Alamos, NM, USA

  2. 2

    Virginia Polytechnic Institute and State University, Center for Intelligent Material Systems and Structures, Blacksburg, VA, USA

Publication History

  1. Published Online: 15 DEC 2010

Abstract

Various experimental studies have demonstrated that an impedance-based approach to structural health monitoring (SHM) can be an effective means of structural damage detection. Using the self-sensing and active-sensing capabilities of piezoelectric materials, the electromechanical impedance response can be monitored to provide a qualitative indication of the local health of a structure. The impedance method also has applications in the field of sensor self-diagnostics and validation for determining the operational status of piezoelectric active sensors used in SHM. This chapter presents an overview and recent applications of the impedance-based structural health-monitoring technique.

Keywords:

  • damage detection;
  • piezoelectric transducers;
  • sensor validation;
  • impedance method;
  • structural health monitoring;
  • wave propagations