Proposed Theory of Semiactive Gains for Smart Dampers in MDOF Systems
Publication: Journal of Structural Engineering
Volume 145, Issue 12
Abstract
The use of smart dampers in civil engineering structures for vibration attenuation has proven to be promising in recent years. Nevertheless, evaluating the effectiveness of smart dampers in multiple-degree-of-freedom (MDOF) dynamic systems is a time-consuming task. This hurdle hinders the consideration of potential families of controllers for a reliable design and tuning process. Consequently, the current study develops a probabilistic approach by introducing a new theory of semiactive control gains to enable the solution of highly nonlinear control systems with smart dampers by employing the Lyapunov function. The primary objective is to test a hypothesis that the tuning of controlled semiactive dampers in MDOF systems can be performed analytically without the burden of numerical simulations. As opposed to current simulation methods, the proposed probabilistic approach can be used to significantly reduce computational efforts. Accordingly, the proposed approach is useful for the design and evaluation of the efficacy of smart dampers in MDOF systems, such as multistory buildings and wind turbines. In addition, the developed control theory will enable the use of accelerated performance-based semiactive controller tuning, with a potential to advance innovative technologies for building smart, resilient, and sustainable structures that can survive multiple hazards.
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Acknowledgments
This study was funded by the Louisiana Board of Regents [RCS Subprogram, LEQSF(2016-19)-RD-A-02]. Additional funding was received from the Office of Research & Economic Development, Louisiana State University (2017-18 Faculty Research Grant—Emerging Research), and the Louisiana Transportation Research Center (LTRC) (14-2TIRE, 14-1ST, and 16-4ST).
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Published In
Journal of Structural Engineering
Volume 145 • Issue 12 • December 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Aug 23, 2018
Accepted: Apr 22, 2019
Published online: Sep 28, 2019
Published in print: Dec 1, 2019
Discussion open until: Feb 28, 2020
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