Comparison of Signal Processing Techniques for Ultrasonic Inspection of Composite Materials

Type : Article de conférence
Auteur(s) :  Redouane DRAI, Abdessalem BENAMMAR, Ahmed KECHIDA
Année :  2007
Domaine : Electronique
Conférence: International Symposium on composites and aircraft materials, damage and fatigue diagnostics (ACMA)
Lieu de la conférence:  Agadir, Morocco 22-24. May 2007
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Mots clés :  Ultrasonic NDE, composite materials, SSP, EM algorithm

Résumé : 

In this paper, two methods permitting the detection and estimation of delamination defect echoes are developped. These methods are based on signal processing techniques such as non linear filtering realised by Split Spectrum Processing (SSP) and estimation by EM algorithm. A simulation study of defect detection is realised and results are validated by experimental results obtained on two types of composite taken from aircraft like fiber-reinforced multi-layered composite materials.