Feature extraction approach insensitive to temperature variations for impedance-based structural health monitoring

Autor(es)

Campos, Fernando de Souza ^[1] ; de Castro, Bruno Albuquerque ^[1] ; Budoya, Danilo Ecidir ^[1] ; Baptista, Fabricio Guimaraes ^[1] ; Covolan Ulson, Jose Alfredo ^[1] ; Andreoli, Andre Luiz ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Sch Engn, Dept Elect Engn, Av Engn Edmundo Carrijo Coube 14-01, Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: IET Science Measurement & Technology; v. 13, n. 4, p. 536-543, JUN 2019.
• Citações Web of Science: 0

Resumo

Structural health monitoring (SHM) based on the electromechanical impedance (EMI) has been pointed out as a promising method for detecting structural damage. However, practical problems such as the effects of temperature variation on the electrical impedance signatures of piezoelectric transducers have made it difficult to effectively apply this method of detecting damage in real structures. Therefore, in order to contribute to the effective application of the EMI method in real structures, this study presents a new feature extraction approach insensitive to temperature variations. The proposed method is based on the Akaike statistical criterion algorithm, which extracts the number of significant resonance peaks from the electrical impedance signatures. Tests were performed on an aluminium bar with different damage sizes and under different temperatures. The experimental results indicate that the proposed method is capable of detecting and quantifying structural damage in environments under temperature variation. (AU)

• Processo FAPESP: 17/23157-3 - Monitoramento de Integridade Estrutural Usando Transdutores Piezelétricos Excitados com Sinais de Alta Frequência
• Beneficiário: Fabricio Guimarães Baptista
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/24903-5 - Sistemas de Monitoramento de Integridade Estrutural Baseados na Impedância Eletromecânica em Aplicações com Baixa Relação Sinal-Ruído
• Beneficiário: Bruno Albuquerque de Castro
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 18/09312-9 - Técnicas de medição e aquisição de sinais de transdutores piezelétricos excitados com sinais de alta frequência no monitoramento de integridade estrutural
• Beneficiário: Danilo Ecidir Budoya
• Modalidade de apoio: Bolsas no Brasil - Doutorado