Semiactive control of base isolated structures with actuator dynamics

In this paper, a new semiactive control approach is presented to stabilize a base isolated structure subjected to parametric uncertainties and unknown disturbances. In the controller design, the actuator dynamics (time delay and frictional effects) are taken into account. The ultimate boundedness is achieved in the closed-loop system. Numerical simulation is done for a 10 story base isolated building, with two semiactive controllers being put on the base and the first floor, to illustrate the effectiveness of the proposed semiactive control scheme.