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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/72492
Title: 
A PZT-based technique for SHM using the coherence function
Author(s): 
Institution: 
  • Universidade Estadual Paulista (UNESP)
  • Center for Intelligent Material Systems and Structures
ISSN: 
  • 2191-5644
  • 2191-5652
Abstract: 
This 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.
Issue Date: 
13-Jun-2011
Citation: 
Conference Proceedings of the Society for Experimental Mechanics Series, v. 1, p. 111-118.
Time Duration: 
111-118
Keywords: 
  • Piezoelectric transducers
  • PWAS
  • PZT
  • Structural health monitoring
  • Aluminum plates
  • Coherence function
  • Host structure
  • Lamb Wave
  • Lead zirconate titanate
  • PZT sensors
  • Standard deviation
  • Structural health
  • Structural health monitoring systems
  • Wide frequency range
  • Aerospace applications
  • Chemical detection
  • Coherent light
  • Damage detection
  • Piezoelectric actuators
  • Semiconducting lead compounds
  • Sensors
  • Signal detection
  • Statistics
  • Structural dynamics
  • Transducers
Source: 
http://dx.doi.org/10.1007/978-1-4419-9302-1_10
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/72492
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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