earticle

영어

The purpose of this study is to verify an applicability of Balanced Model Reduction(BMR) technique known as one of the controller reduction technique, for an active vibration control in a base isolated structure subjected to the seismic excitations. A controller devised in a reduced order can have beneficial effects not only on computing time required for generating the input forces but also on the hardware implementations. The control algorithm used in the closed loop control system in this study is called Loop Transfer Recovery(LTR) method to enhance the robust stability against the uncertainties inherently existing in the mathematical model, resulting in a full order controller. The order of the controller is then reduced by BMR technique as the prescribed procedures. The performance of the reduced controller is determined from the time history responses as well as the frequency responses. The results indicate that the reduced order control system using BMR technique with LTR method(BMR/LTR) exhibits nearly identical responses characteristics to those of the full order control system in both the time and the frequency domain.