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Contrôle santé des structures composites : approche expérimentale et statistique

Abstract : The aviation industry uses materials always more effective for its aircraft and space systems. The aircraft are equipped with antenna arrays to make communications. Our thesis falls within the MSIE project (Matériaux et Structures Intelligentes pour l'Electromagnétisme). The objective of this project is to meet the demands of the aviation industry, to evaluate the concept of new materials that enable the realization of compact and reconfigurable antenna composite structures. This adaptability assumes that these structures are also equipped with sensors/actuators able to perform an active control. It then necessary to add to these future structures a Structural Health Monitoring systems (SHM) to detect possible damage (impact, delamination between the host structure and the antenna array, fiber breakage, etc...), which may occur during the flight or during the aging of the structure. The development of the SHM systems is the core of our thesis. For this purpose, we have built experimental tests that took into account the industrial requirements. These experimental tests include antenna composite structures equipped with piezoelectric sensors and actuators. Through the information received from the sensors, we developed two damage detection methodologies, based on Principal Component Analysis (PCA) and Independent Component Analysis (ICA). These methods are statistical approaches, which have the particularity of not requiring any knowledge of the mechanical model of the structure to be monitored. These two methods are a way to extract features from the piezoelectric sensors of the structure in a healthy and in an unknown state. The comparison between these characteristics allowed us to calculate for each method, a damage index. Furthermore, to robustify the decision, we have associated to this damage index, a bound that decides if the structure is in healthy or damaged state. We have successfully applied the two methods to detect damage in antenna composite structures, namely: impact, delamination of the composite structures.
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Contributor : Rafik Hajrya <>
Submitted on : Tuesday, September 4, 2012 - 10:01:21 AM
Last modification on : Friday, July 17, 2020 - 2:54:12 PM
Long-term archiving on: : Wednesday, December 5, 2012 - 10:06:30 AM

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  • HAL Id : pastel-00727638, version 1

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Hajrya Rafik. Contrôle santé des structures composites : approche expérimentale et statistique. Automatique / Robotique. Arts et Métiers ParisTech, 2012. Français. ⟨NNT : 2012ENAM0023⟩. ⟨pastel-00727638⟩

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