Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
A Damage-Tolerant Modal Observer Applied to the Structural Healthy Monitoring of a Closed-Loop Structure Subjected to Seismic Events
Submission Author:
Fabíola Martins Campos de Oliveira , SP , Brazil
Co-Authors:
Helói Genari, Fabíola Martins Campos de Oliveira
Presenter: Helói Genari
doi://10.26678/ABCM.COBEM2019.COB2019-0637
Abstract
This paper investigates a technique for structural health monitoring (SHM) applied to a closed-loop structure subjected to damage. SHM-vibration-based techniques are typically designed for open-loop systems to avoid damage effect attenuation in structural vibrations due to the controller action. However, aiming to make the structure more secure against ambient agents and the consequences of their actions such as damage, a new damage-tolerant active controller generation has been developed and applied to smart structures. In this context, an adequate structural monitoring module is necessary to signal to the control system the damage occurrence. For this reason, this paper investigates a new SHM technique based on a damage-tolerant modal observer and on a reference model. The residue obtained by the state-vector difference between the reference model and the modal observer is used to determine the damage occurrence. A vertical flexible building model is used as a case study structure, including health and damage conditions, to examine the SHM strategy. Results show that the proposed methodology for SHM purpose is effective for damage detection in closed-loop structures.
Keywords
Damage-tolerant modal observer, Structural Health Monitoring, damage-tolerant active control
