Banca de DEFESA: PABLO JOSÉ TAVARES GOMES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : PABLO JOSÉ TAVARES GOMES
DATA : 13/12/2019
HORA: 14:00
LOCAL: LABINFO (Sala 5.1.4) EPUFBA
TÍTULO:

Structures Identification in State-Space using ERA/OKID Algorithm

PALAVRAS-CHAVES:

Keywords: System Identification. ERA. OKID. Dynamic Systems. Modal Analysis.

PÁGINAS: 107
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Mecânica
SUBÁREA: Mecânica dos Sólidos
ESPECIALIDADE: Análise de Tensões
RESUMO:

ERA was developed in the aerospace engineering environment in the 1980s to enable the identification of complex state-space systems. To use ERA an impulsive input and measurements of the system outputs for Hankel matrix composition are required. The singular value decomposition of this matrix allows the identification of the matrices that govern the system. The difficulty in working with impulsive inputs in real systems and the need to reduce computational efforts in low damped systems motivated the development of ERA/OKID. This methodology is a derivation of the ERA theory by applying a state observer filter or Kalman filter. These two methodologies have been used in the field of control engineering to allow the identification of complex systems and the development of optimal controllers, since the systems are identified in state space and this representation is essential in this area of knowledge. However, the tools show great potential to aid the modal analysis of systems, since one of the possibilities, after identifying the minimum system realization, is to obtain the modal parameters - natural frequency and damping factor, for example. To highlight these possibilities, the work presents the basic concepts of systems identification, the theories for the development of ERA and ERA/OKID and systems analysis by modal superposition. In addition, the ERA/OKID algorithm is applied to a two different experimental systems, namely: a classic 2 DOF mechanical system and a composite material beam. The results obtained for both were very interesting

MEMBROS DA BANCA:
Presidente - 2256014 - MARCO TULIO SANTANA ALVES
Interno - 1413984 - PAULA FRASSINETTI CAVALCANTE
Externo à Instituição - EDSON HIDEKI KOROISHI - UTFPR