期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 54-55, 期 -, 页码 195-209出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2014.08.015
关键词
Damage localization; Ultrasonic guided waves; Sensor fusion; Statistical modeling; Complex structures; Structural health monitoring
资金
- National Science Foundation
- Agency for Defense Development in Korea by the Leading Foreign Research Institute Recruitment Program through the National Research Foundation of Korea - Ministry of Education, Science and Technology (Korea) [UG110097JD, 2011-0030065]
Ultrasonic guided waves represent a promising technique for detecting and localizing structural damage, but their application to realistic structures has been hampered by the complicated interference patterns produced by scattering from geometric features. This work presents a new damage localization paradigm based on a statistical approach to dealing with uncertainty in the guided wave signals. A bolted frame and a section of a fuselage rib are tested with different simulated damage conditions and used to conduct a detailed comparison between the proposed solution and other sparse-array localization approaches. After establishing the superiority of the statistical approach, two novel innovations to the localization procedure are proposed: an approach to sensor fusion based on the Neyman-Pearson criterion, and a method of constructing simple models of geometrical features. Including the sensor fusion and geometrical models produces a substantial improvement in the system's localization accuracy. The final result is a robust and accurate framework for single-site damage localization that moves structural health monitoring towards practical implementation on a much broader range of structures. (C) 2014 Elsevier Ltd. All rights reserved.
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