| Title |
The Estimation of the First Modal Across-wind Load Using Kalman Filter and Force Identification |
| Authors |
Hwang Jae-Seung ; Lee Chung-Nam |
| Keywords |
Modal Across-wind Load ; Acceleration Response ; Kalman Filter ; Force Identification ; Inverse Problem |
| Abstract |
The force identification from the response of a structure is the one of the typical inverse problems. In this study, a force identification method to estimate the modal across-wind load of the first mode from structural responses using Kalman filter is presented. The Kalman filter is utilized for the modal wind load estimation from measured responses and corresponding filter gain is optimized by minimizing the error between the exact modal wind load and the estimated one. The numerical simulation is performed to verify the feasibility of the proposed method. It is found that the accuracy of the identification result is affected by the noise induced by the error between the exact modal acceleration response and the estimated acceleration one by Kalman filter. In addition, the effect of the location and the number of sensors on the accuracy of the identification of modal wind load is investigated. The numerical analysis results showed that the first modal wind load could be estimated precisely from a few measured acceleration responses and the accuracy of the result is sensitive to the location of the accelerometers. |