A chromatic technique for structural damage detection under noise effects based on impedance measurements

Autor(es)

de Castro, Bruno Albuquerque ^[1] ; Baptista, Fabricio Guimaraes ^[1] ; Ardila Rey, Jorge Alfredo ^[2] ; Ciampa, Francesco ^[3]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Dept Elect Engn, Bauru - Brazil

^[2] Univ Tecn Federico Santa Maria, Dept Elect Engn, Santiago - Chile

^[3] Univ Surrey, Dept Mech Engn Sci, Guildford, Surrey - England

• Tipo de documento: Artigo Científico
• Fonte: MEASUREMENT SCIENCE & TECHNOLOGY; v. 30, n. 7 JUL 2019.
• Citações Web of Science: 0

Resumo

Structural health monitoring (SHM) based on electromechanical impedance (EMI) measurements has been extensively studied in recent years and stands out as an effective damage detection approach. The EMI method commonly uses low-cost piezoelectric transducers and structural diagnosis can be accomplished by analyzing the changes in the impedance measurements from the transducers attached to the host structure. Although many studies have proved the effectiveness of the EMI method, one of the most reported problems is the variations in the impedance caused by external noise, which can alter the impedance measurements and limit the effectiveness of the detection and quantification of damage using conventional basic damage indices. Therefore, this paper proposes a new approach for structure feature extraction in noisy environments based on the chromatic signal processing technique associated with the Hinkley criterion, thus aiming to expand the applicability of the EMI method to real applications. Experimental tests were carried out on aluminum and carbon fiber composite plates subjected to various signal noise levels. The experimental results indicate that the proposed approach is more effective for damage detection compared to the basic indices commonly reported in the literature. (AU)

• 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: 18/23737-2 - Sistemas de localização de falhas baseados no princípio da impedância eletromecânica e em ondas guiadas livres de linha de base em condições de baixa relação sinal ruído
• Beneficiário: Bruno Albuquerque de Castro
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado