ABSTRACT
As introduced in the previous chapters, passive damping systems, such as dissipators and tuned mass dampers can be easily designed. Furthermore, their application is quite straightforward. The operation of these systems does not require any external power supply. Still, they exhibit one significant disadvantage, which is the missing adaptation capability of their control behavior to the actual requirements of the structure and the loading situation. This drawback impedes the possibility of a high performance structural control with the passive devices. Therefore, as alternative, active and semi-active systems are being researched and developed. This chapter introduces both systems with their relevant components and presents application examples.
