Abstract
Vibration control theory, computer simulation and experimental verification on a hybrid mass-damper system with semi-circular curved linear-motor device for absorbing vibration are described. The control theory using output regulation with internal stability is applied in designing the system. The computer simulations of the system subjected to artificial earthquake ground motions generated in accordance with hard, quasi-resonant and soft soil conditions are presented. Shaking table tests of a steel structured model of the system for verifying realizability of the simulations are reported.