QFT control for vibration reduction in structures equipped with MR dampers

This short paper addresses the problem of designing a QFT (Quantitative Feedback Theory) based controllers for the vibration reduction in a 6-story building structure equipped with shear-mode magnetorheological dampers. A new methodology is proposed for characterizing the nonlinear hysteretic behavior of the MR damper through the uncertainty template in the Nichols chart. The design procedure for QFT control design is briefly presented.