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Hybrid base‐isolation with magnetorheological damper and fuzzy control
Author(s) -
Lin P. Y.,
Roschke P. N.,
Loh C. H.
Publication year - 2007
Publication title -
structural control and health monitoring
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.587
H-Index - 62
eISSN - 1545-2263
pISSN - 1545-2255
DOI - 10.1002/stc.163
Subject(s) - damper , base isolation , magnetorheological fluid , earthquake shaking table , engineering , magnetorheological damper , control theory (sociology) , structural engineering , acceleration , dissipation , tuned mass damper , displacement (psychology) , fuzzy logic , vibration control , vibration , computer science , control (management) , mechanical engineering , physics , acoustics , frame (networking) , artificial intelligence , psychology , classical mechanics , psychotherapist , thermodynamics
Abstract A series of large‐scale experimental tests is conducted on a mass equipped with a base‐isolation system that consists of high damping rubber bearings (HDRB) and a 300 kN magnetorheological (MR) damper. The 21 772 kg mass and its hybrid isolation system are subjected to various intensities of near‐ and far‐fault earthquakes on a large shake table. Three proposed fuzzy controllers use feedback from displacement, velocity, or acceleration transducers attached to the structure to modulate resistance of the semi‐active damper to motion. Results from various types of passive and semi‐active control strategies are summarized and compared. The study shows that a combination of HDRB isolators and an adjustable MR damper can provide robust control of vibration for large civil engineering structures that need protection from a wide range of seismic events. Low power consumption, direct feedback, high reliability, energy dissipation, and fail‐safe operation are validated in this study. Copyright © 2006 John Wiley & Sons, Ltd.