Can damage be detected without any baseline data?

Hoon Sohn; Hyun Woo Park

doi:10.1117/12.605374

9 May 2005 Can damage be detected without any baseline data?

Hoon Sohn, Hyun Woo Park

Proceedings Volume 5768, Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems IV; (2005) https://doi.org/10.1117/12.605374
Event: Nondestructive Evaluation for Health Monitoring and Diagnostics, 2005, San Diego, CA, United States

Abstract

A structural health monitoring system is developed for continuous online monitoring of delamination initiation and growth in composite structures. Structural health monitoring problems are often cast in the context of a statistical pattern recognition paradigm, in which a damage state of the system is inferred by comparing test data with baseline data. However, subtle signal changes due to damage can often be masked by larger ambient variation of the operational and environmental conditions of an in-service structure. Therefore, it is critical for the development of a robust monitoring system to minimize false-positive indications of damage caused by the undesired operational and environmental variation of the system. The issue of minimizing damage misclassification has been addressed in this paper by developing an instantaneous damage detection system that does not rely on any prior baseline data. The development of the proposed instantaneous damage diagnosis system is based on the concepts of time reversal acoustics and consecutive outlier analysis, and the proposed damage diagnosis system has been tested for detecting delamination in composite plates.

Citation Download Citation

Hoon Sohn and Hyun Woo Park "Can damage be detected without any baseline data?", Proc. SPIE 5768, Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems IV, (9 May 2005); https://doi.org/10.1117/12.605374

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available