Decentralised H robust control of MTMDs for mitigating vibration of a slender MDOF floor configuration
Ao, WK; Tang, Q-C; Pavic, A
Date: 22 July 2024
Article
Journal
Thin-Walled Structures
Publisher
Elsevier
Publisher DOI
Abstract
In this research, a novel robust decentralised 𝐻 (𝐻∞ and 𝐻2) design combined with a pattern search method (PSM), incorporating considerations of multiple modal dynamics, was developed to address the vibration issue in slender structures. To verify the effectiveness of the concept, a full-scale laboratory reconfigurable multiple ...
In this research, a novel robust decentralised 𝐻 (𝐻∞ and 𝐻2) design combined with a pattern search method (PSM), incorporating considerations of multiple modal dynamics, was developed to address the vibration issue in slender structures. To verify the effectiveness of the concept, a full-scale laboratory reconfigurable multiple degrees of freedom (MDOF) test-bed floor panel structure was selected, equipping with a passive multipletuned mass damper (MTMD) as a coupling system. The optimal parameters of the MTMDs were tailored using the decentralised 𝐻 design and the PSM, considering the dynamic engagement of multiple modes. Furthermore, a crucifix-type configuration of 2DOF MTMDs was proposed to mitigate the vibration of the floor panel structure. Full-scale forced vibration testing (FVT) was conducted to validate the dynamic performance of the 2DOF MTMDs. The test results provide satisfactory verification and high-quality curve-fitting testing data for parameter study and dynamic simulation. By examining the field data from the 2DOF MTMDs and performing various numerical simulations and analyses, the control performance robustness of the MTMDs was comprehensively evaluated, considering practical engineering variations such as the number and stiffness of MTMDs, as well as the stiffness and mass of the floor panel structure. As a result, the proposed 𝐻 control strategies for the MTMDs demonstrated robust control capabilities by effectively dissipating significant amounts of externally applied energy.
Engineering
Faculty of Environment, Science and Economy
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