Abstract
This paper deals with an application of hybrid mass damper (HMD) using linear motor to an actual tall building which has a height of 101m. By using the linear motor as an actuator, the HMD has a simple structure, little noise of working and an easy maintenance as compared with those using normal AC servomotor, because the HMD has no mechanical part to translate form torque to linear force. Its controllers, for the 1st and 2nd modes of X translation and 1st mode of torsion of the objective building, are designed by H^∞ control theory for absolute acceleration feedback control. The control system becomes also more simply than those of current HMDs which use state feedback control by optimal regulator, because the feedback signals are only two absolute accelerations of the top floor. The performance of the HMD is confirmed through excitation tests of the building and simulations against winds.
