Designing a fuzzy-based hybrid control system to reduce structure vibration using rooftop tank and MR damper

Articles in Press

Authors

1 Iran-Tabriz-University of Tabriz-Faculty of Electrical and Computer engineering

2 Faculty of Civil engineering-University of Tabriz-Tabriz

3 Faculty of Electrical and Computer engineering-University of Tabriz-Iran

4 Faculty of Civil Engineering-University of Tabriz

10.22034/ceej.2025.62705.2374

Abstract

Hybrid control systems take advantage of passive and semi-active control systems. In this research, a new hybrid control system is proposed, combining a tuned liquid mass damper and an MR damper. Deep tanks are considered as tuned liquid mass dampers using Housner’s method. These tanks, classified as passive control systems, are installed on the roof of the structure, and a pattern search algorithm optimizes their parameters. The MR damper is installed as a semi-active system on the last floor of the structure, and its voltage is calculated using a fuzzy controller. The fuzzy controller, a type of logic controller that uses fuzzy logic to map the input to output, allows the MR damper's voltage to be adjusted in real-time based on the current state of the structure. As a result, the necessary control force to reduce the structure's response is obtained by equipping the hybrid control system. The analysis results of the 20 types of proposed hybrid control systems with different tank dimensions for two far-field and two near-field earthquake vibrations show that the average response of displacement and acceleration of the structure can be reduced by 45% and 30%, respectively. Also, by examining the effect of liquid height and tank volume, it is demonstrated that increasing the liquid height and tank volume can positively affect reducing the structure's displacement and acceleration responses.

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Journal of Civil and Environmental Engineering

Articles in Press, Accepted Manuscript
Available Online from 03 March 2025

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