Monitoring and Control of Structures Considering Diverse　Uncertainties

摘要

The structures are coupled with smart technologies such as hybrid type damper demands appropriate control andmonitoring scheme as generally show quite complex nonlinear behavior. Additionally, the structures are vulnerable due toenvironmental changes as well as for inherent nonlinearities of the used materials/devices. Therefore, dealing with variousuncertainties are unavoidable in order to monitor any dynamical system. To do this end, the unscented Kalman filter (UKF)is employed and the structures are assumed to be accompanied with various uncertainties such as structural properties arecorrupted, sensor noise, controller parameters. Further, it is also investigated that the complexity of monitoring of structuralsystems due to the uncertainty of initial covariance, especially, when the structural properties e.g. damping componentsare flawed. In order to perform numerical investigations an eight degree of freedom system is adopted and the viscousdamping (VD) and negative stiffness (NS) and only with negative stiffness (WNS) schemes are employed to estimate thecontrol force of virtual hybrid type control system. The investigated approach is capable of handling diverse uncertaintiesin addition to the process and measurement noise. The outcome will guide to evaluate the conditions (e.g. structural health)of erroneous system in a non-destructive manner by analyzing measured signals.