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Proceedings Paper

Non-model-based approach to damage localization
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Paper Abstract

A limiting factor for many current structural health monitoring methods is that in order to locate damage, modeling of the structural response is required. The structural model itself can introduce significant errors, in addition to sensor noise, both through limitations in the assumptions applied and manufacturing variations. This work presents a method of localizing damage that eliminates the requirement for an independent structural model. The method is based on the flexibility parameters of the structure in pre- and post- damage states. An technique has been developed that allows the required information to be constructed from only sensor and actuator data. From the sensor data, a set of damage location vectors are determined. These vectors are shown to localize damage via two methods: The first analysis reapplies each set damage location vector as applied forces to the structure. The second, more applicable to real-time health monitoring, locates lowest values of the damage location vectors themselves. Simulations on a plate are performed for two sensor meshes (eight and thirty-two locations). The results demonstrate excellent damage localization, and some indication of damage severity. Finally an experimental demonstration of the method utilizing eight sensors surface mounted to an aluminum plate is presented.

Paper Details

Date Published: 20 July 2004
PDF: 12 pages
Proc. SPIE 5393, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III, (20 July 2004); doi: 10.1117/12.540094
Show Author Affiliations
Michael Camerino, North Carolina State Univ. (United States)
Kara Peters, North Carolina State Univ. (United States)

Published in SPIE Proceedings Vol. 5393:
Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III
Peter J. Shull; Andrew L. Gyekenyesi, Editor(s)

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