active control of structures using h infinity method

this paper presents robust h∞ control for civil engineering structures using state feedback, within the h∞ framework controller which lead to desirable performance are obtained, using full degree of sensors. in this paper three story building is considered and a robust controller is designed with mentioned algorithm to mitigate the responses due to strong earthquake excitations. the results indicate that significant reductions in the building responses can be achieved with h_∞ method.