In this paper, the method of least square estimates is used to model a
ctually built structures by means of measured input and output signals
. The input signals can be generated from exciting the structural cont
rol mechanism itself. The identified model serves to design a discrete
-time feedback control law. The derived control law is used to control
the actual structure against general disturbances. An illustrative ex
ample is given to show the procedure on one-storey building frame with
tendon control mechanism.