Damage Detection with Auxiliary Subsystem

Abstract:

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Among Non-Destructive Evaluation, vibration-based methods respond to the current ten- dency which is to integrate into the structure identi cation and monitoring systems; to this aim transducers and sensors are embedded with the mechanical system and driven by suitably designed electronic controllers. The major limit of this and the other indirect identi cation techniques based on frequency response measurements turns out to be the small sensitivity to local variations of mechanical characteristics: it re ects on a uncertainty on the identi ed parameters, since it implies a small curvature of any reasonable identi cation functional build on these quantities. An enlightening example for the application of the proposed technique is given through a beam- like structure coupled to a network of piezoelectric patches. Although the forces exerted by the piezoelectric transducers are not large, the choice of such a kind of actuators/sensors implies the remarkable advantage of dealing with highly sensitive and easily tunable devices.

Info:

Periodical:

Edited by:

Pietro VINCENZINI and Fabio CASCIATI

Pages:

401-413

DOI:

10.4028/www.scientific.net/AST.56.401

Citation:

F. Vestroni et al., "Damage Detection with Auxiliary Subsystem", Advances in Science and Technology, Vol. 56, pp. 401-413, 2008

Online since:

September 2008

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Price:

$35.00

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