Abstract
The objective of this study is to formulate and assess a simple time‐domain control algorithm. The algorithm under consideration applies a control force to the structure at the current time step in order to cancel the portion of the system velocity that is induced by the response and the external load at the preceding time step. The effectiveness of the control algorithm is quantified using representative SDOF and MDOF test structures subjected to several earthquake time histories. The performance of the time‐domain control algorithm is comparable with the performance of the classic linear quadratic regulator (LQR) formulation. Furthermore, the time‐domain algorithm seems to be almost insensitive to uncertainties in the structural parameters and is able to accommodate practical limitations, such as maximum actuator capacity, without a drastic degradation in performance. Lastly, for MDOF structures, it is possible to develop and compare several control schemes depending on which velocities are selected to be independent of the response and loading at the previous time step.
Published Version
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