Abstract
An experiment of sequential data assimilation in a cantilevered beam model is presented. The sequential data assimilation is based on the Ensemble Kalman filter (EnKF), which can be easily incorporated in nonlinear finite element analysis. A simple system noise setting scheme is presented, which can set a variance of the system noise in accordance with the residual error in the EnKF. In the experiment, a tip load of the beam is considered as a model parameter to be estimated. The experimental results indicate that the model parameter is accurately estimated by using the EnKF even when the tip load is rapidly changed.
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