Title :
Acoustic emission in aerospace structures
Author :
Wells, P.J. ; Wright, W.A. ; Roberts, S.J.
Author_Institution :
Dept. of Adv. Inf. Process., BAe plc, Bristol, UK
Abstract :
We have shown how four sensors can be used to investigate the location of acoustic emission in aerospace structures and how the effective propagation speed can be calculated on an event by event basis. We have also investigated the possible multiplicity of solutions and used a sensitivity analysis to obtain a maximum entropy deconvolution of an acoustic emission map. We have finally shown how embedding methods can be used to divide the signal into separate components which can be treated as “virtual” sensors
Keywords :
acoustic emission testing; acoustic emission location; acoustic location map; aerospace structures; effective propagation speed; embedding methods; event by event basis calculation; fatigue cracks; four sensors; maximum entropy deconvolution; multiplicity of solutions; sensitivity analysis; signal separation; virtual sensors;
Conference_Titel :
Condition Monitoring: Machinery, External Structures and Health (Ref. No. 1999/034), IEE Colloquium on
Conference_Location :
Birmingham
DOI :
10.1049/ic:19990189
