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Proceedings Paper

Active damage interrogation system for structural health monitoring
Author(s): Peter F. Lichtenwalner; James P. Dunne; Ronald S. Becker; Erwin W. Baumann
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Paper Abstract

An integrated and automated smart structures approach for in situ damage assessment has been implemented and evaluated in a laboratory environment for health monitoring of a realistic aerospace structural component. This approach, called Active Damage Interrogation (ADI), utilizes an array of piezoelectric transducers attached to or embedded within the structure for both actuation and sensing. The ADI system, which is model independent, actively interrogates the structure through broadband excitation of multiple actuators across the desired frequency range. Statistical analysis of the changes in transfer functions between actuator/sensor pairs is used to detect, localize, and assess the severity of damage in the structure. This paper presents the overall concept of the ADI system and provides experimental results of damage assessment studies conducted for a composite structural component of the MD-900 Explorer helicopter rotor system. The potential advantages of this approach include simplicity (no need for a model), sensitivity, and low cost implementation. The results obtained thus far indicate considerably promise for integrated structural health monitoring of aerospace vehicles, leading to the practice of condition-based maintenance and consequent reduction in life cycle costs.

Paper Details

Date Published: 23 May 1997
PDF: 9 pages
Proc. SPIE 3044, Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies, (23 May 1997); doi: 10.1117/12.274663
Show Author Affiliations
Peter F. Lichtenwalner, McDonnell Douglas Aerospace (United States)
James P. Dunne, McDonnell Douglas Aerospace (United States)
Ronald S. Becker, McDonnell Douglas Aerospace (United States)
Erwin W. Baumann, McDonnell Douglas Aerospace (United States)

Published in SPIE Proceedings Vol. 3044:
Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies
Janet M. Sater, Editor(s)

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