A PZT-based technique for SHM using the coherence function

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorVieira Filho, Jozué
dc.creatorBaptista, Fabricio Guimarães
dc.creatorInman, Daniel J.
dc.date2014-05-27T11:25:54Z
dc.date2016-10-25T18:34:04Z
dc.date2014-05-27T11:25:54Z
dc.date2016-10-25T18:34:04Z
dc.date2011-06-13
dc.date.accessioned2017-04-06T01:50:59Z
dc.date.available2017-04-06T01:50:59Z
dc.identifierConference Proceedings of the Society for Experimental Mechanics Series, v. 1, p. 111-118.
dc.identifier2191-5644
dc.identifier2191-5652
dc.identifierhttp://hdl.handle.net/11449/72492
dc.identifierhttp://acervodigital.unesp.br/handle/11449/72492
dc.identifier10.1007/978-1-4419-9302-1_10
dc.identifier2-s2.0-79958106669
dc.identifierhttp://dx.doi.org/10.1007/978-1-4419-9302-1_10
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/893360
dc.descriptionThis paper presents a new approach for damage detection in structural health monitoring systems exploiting the coherence function between the signals from PZT (Lead Zirconate Titanate) transducers bonded to a host structure. The physical configuration of this new approach is similar to the configuration used in Lamb wave based methods, but the analysis and operation are different. A PZT excited by a signal with a wide frequency range acts as an actuator and others PZTs are used as sensors to receive the signal. The coherences between the signals from the PZT sensors are obtained and the standard deviation for each coherence function is computed. It is demonstrated through experimental results that the standard deviation of the coherence between the signals from the PZTs in healthy and damaged conditions is a very sensitive metric index to detect damage. Tests were carried out on an aluminum plate and the results show that the proposed methodology could be an excellent approach for structural health monitoring (SHM) applications.
dc.languageeng
dc.relationConference Proceedings of the Society for Experimental Mechanics Series
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectPiezoelectric transducers
dc.subjectPWAS
dc.subjectPZT
dc.subjectStructural health monitoring
dc.subjectAluminum plates
dc.subjectCoherence function
dc.subjectHost structure
dc.subjectLamb Wave
dc.subjectLead zirconate titanate
dc.subjectPZT sensors
dc.subjectStandard deviation
dc.subjectStructural health
dc.subjectStructural health monitoring systems
dc.subjectWide frequency range
dc.subjectAerospace applications
dc.subjectChemical detection
dc.subjectCoherent light
dc.subjectDamage detection
dc.subjectPiezoelectric actuators
dc.subjectSemiconducting lead compounds
dc.subjectSensors
dc.subjectSignal detection
dc.subjectStatistics
dc.subjectStructural dynamics
dc.subjectTransducers
dc.titleA PZT-based technique for SHM using the coherence function
dc.typeOtro


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