  The tuned liquid dampers (TLD) technology is a feasible and cost-effective
seismic design. In order to improve its efficiency it is fundamental to find
accurate models describing their dynamic. A TLD system can be modeled through
the Housner model and its parameters can be estimated by solving a nonlinear
state estimation problem. We propose a robust extended Kalman filter which
alleviates the model discretization and the fact that the noise process is not
known. We test the effectiveness of the proposed approach by using some
experimental data corresponding to two classical seismic waves, namely the El
Centro wave and the Hachinohe wave.
