Estudo de métodos de identificação multivariável baseados em subespaços aplicados ao monitoramento da integridade de estruturas / Study of subspace-based identification methods applied to structural health monitoring

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

29/07/2011

RESUMO

Structural Health Monitoring (SHM) is a multidisciplinary research field, which covers techniques, technologies and methods which are essential to perform a continuous and intelligent diagnosis about mechanical structure integrity. The development of structures with improved durability, improved operational safety and reduced maintenance cost are the main reasons that justify the investments in research and development in this area, by a numerous amount of industrial and services sectors. In this work, the application of multivariable identification subspace-based identification techniques with parity residue generation and analysis are studied as tools to perform structural damage detection, which is the basis of a complete structural diagnosis procedure. The realization of this work involved the construction of an experimental workbench to detect damages in plate elements, equipped with multiple sensors and actuators. The development of a subspace-based identification method with spectral segmentation that made possible to improve the quality and to reduce the computational cost of system identification was one of the major steps achieved in this work. Also, some data fusion techniques were studied, aiming to perform a more robust detection. The main results obtained in this work will be the basis to develop an intelligent and real-time structural diagnosis system.

ASSUNTO(S)

identificação de sistemas processamento de sinais análise estrutural (engenharia) system identification signal processing structural analysis (engineering)

ACESSO AO ARTIGO

Documentos Relacionados