Online input, state, and response estimation for building structures under earthquakes using limited acceleration measurements

Sdiq Anwar Taher; Jian Li; Huazhen Fang

doi:10.1117/12.2557712

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18 May 2020 Online input, state, and response estimation for building structures under earthquakes using limited acceleration measurements

Sdiq Anwar Taher, Jian Li, Huazhen Fang

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Proceedings Volume 11379, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2020; 1137908 (2020) https://doi.org/10.1117/12.2557712
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

This paper proposes online input, state, and response estimation based on Augmented Kalman filter for systems without direct feedthrough, such as earthquake-excited building structures with absolute floor acceleration measurements. Measurement noise, modelling error, and incomplete absolute acceleration measurement are considered. The system model in this case lacks direct feedthrough, resulting in weak observability of system input, for which a small uncertainty in the model and measurement data would lead to a drastic change in the estimation. The augmented state Kalman filter for system without direct feedthrough is proposed for earthquake-excited building structures, in which the input with known variance is augmented with states in order to estimate them together. Compared with unbiased minimum-variance input and state estimation methods that make no assumption of input, the proposed online approach is able to perform robust estimation of states, input, and responses at unmeasured locations successfully using only a limited number of absolute acceleration measurements.

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Sdiq Anwar Taher, Jian Li, and Huazhen Fang "Online input, state, and response estimation for building structures under earthquakes using limited acceleration measurements", Proc. SPIE 11379, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2020, 1137908 (18 May 2020); https://doi.org/10.1117/12.2557712

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