Abstract
In this paper we design a gain-scheduled (GS) H∞ controller of a semi-active seismic isolation system using a large-scale 40 kN-class magneto-rheological fluid (MR) damper for a four-degree-of-freedom structure. By introducing a fictitious damper model we can transform the bilinear model into a linear parameter varying (LPV) model for which designing of a GS controller based on linear matrix inequalities (LMIs) is available. For verification of the control performance we carry out simulations and experiments for some kind of earthquakes using the 40 kN-class MR damper. In comparison with the skyhook damping control or a passive damper it is verified that the proposed method has good performance.
