構造同定

[I-312] STRUCTURE PARAMTER ESTIMATION UNDER UNKNOWN SEISMIC EXCITATION WITH AN ADAPTIVE KALMAN FILTER

Yaohua Yang¹, 〇Tomonori Nagayama¹ (1.The University of Tokyo)

Keywords:Extended Kalman filter, Process noise adaption, Parameter identification, Seismic response

An adaptive extended Kalman filter (EKF) is proposed to conduct parameter estimation of civil structures under unknown seismic excitations in this paper. In order to avoid the tuning of process noise covariance matrix Q as normal EKF does, an offline noise estimation method is combined with the EKF method to adjust Q matrix automatically. The proposed method is numerically verified using a bridge pier model case showing high estimation accuracies.