Active tuned mass damper inerter with optimized fuzzy logic controller for structural seismic vibration mitigation

Abstract

In this study, a smart inerter-based tuned mass damper (TMD) using an active technique is proposed wherein its fuzzy logic controller (FLC) is optimized through the genetic algorithm (GA). The uniqueness of the strategy lies in employing the GA to optimize the main parameters of the active FLC controller, aiming to enhance the structural seismic vibration mitigation performance of the passive TMD equipped with an inerter. First, the best control effect with practical feasibility among GA-optimized passive tuned mass damper inerter (PTMDI) layouts is discussed and determined, where it is installed between the last two consecutive floors, and the inerter is linked to the penultimate floor of the seismic vibrated structure. Later, active TMDI (ATMDI) with the same layout is proposed and analyzed in a primary structure excited by the seismic records and harmonic excitation. This clarifies the effect of the GA-optimizer on the design parameters of the FLC controller, the performance of the active methodology, as well as the key role of the inerter element in the configuration layout. The ATMDI is compared to the PTMDI, and an active TMD (ATMD) controlled by the same algorithm. The results show significantly improved responses using the ATMDI with lower additional mass than the ATMD. Finally, the simulation results demonstrate that the GA-FLC ATMDI, with the presence of an inerter element, can remarkably attenuate the seismic-induced motion in multi-story buildings with relatively simple design requirements.