A PZT-based technique for SHM using the coherence function
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.
How to cite this document
Keywords
Language
Collections

Related items
Showing items related by title, author, creator and subject.
-
Structural health monitoring of sandwich structures based on dynamic analysis
Marques, Denys; Flor, Felipe R.; de Medeiros, Ricardo; Pagani Junior, Carlos Do Carmo; Tita, Volnei (Latin American Journal of Solids and Structures, 2018) [Artigo]
This work aims to contribute to the development of SHM systems based on vibration methods to be applied on sandwich structures. The main objective is focused on experimental damage identification via changes in the Frequency ... -
The influence of self-weight of elastic 2D structures in topology optimization via numerical technique Smooth Evolutionary Structural Optimization (SESO)
Simonetti, H. L.; Almeida, V. S.; Oliveira Neto, L.(Revista Internacional De Metodos Numericos Para Calculo Y Diseno En Ingenieria, 2014) [Artigo]
This paper deals with topology optimization in plane elastic-linear problems considering the influence of the self weight in efforts in structural elements. For this purpose it is used a numerical technique called SESO ... -
Landscape structure and local variables affect plant community diversity and structure in a Brazilian agricultural landscape
Silveira dos Santos, Juliana; Silva-Neto, Carlos M.; Castro Silva, Thiago; Nascimento Siqueira, Karoline; Ribeiro, Milton Cezar
; Garcia Collevatti, Rosane (Biotropica, 2022) [Artigo]
The biodiversity in agricultural landscapes depends on land-use types, natural elements, and farming intensity. The Brazilian Cerrado is a biodiversity hotspot, however, the native vegetation loss rates have increased in ...