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A newly designed adaptronic component with a powerful piezo-stack actuator for active damping of machine vibrations is presented in this paper. Especially for machine tools with parallel kinematics, which feature lightweight structures and which are built in order to obtain high processing speeds, the active damping of machine vibrations is important to achieve the desired system performance. Extensive simulation studies with flexible multibody systems in order to test different control algorithms such as dissipative control, integrated force feedback or H2/Hinfinity control and recent experimental results show the high potential to improve the system behavior. The simulation results with the different controller designs show clearly the great potential of the selected actuator design. The additional adaptronic actuator makes it possible to damp out the dominant resonances in the system as well as to improve the tracking behavior of the machine tool independently of the position control system. Already relatively simple local approaches like IFF and PPF enable the damping out of dominating resonances, although they leave the control designer with very limited degrees of freedom. The model-based approaches as H2 or LQG control include more ambitious goals into the design process, e.g. an improved tracking or higher robustness against disturbances, but they will also need an adequate system identification for the experimental realization. Even an adaptive H2 design is conceivable, which takes the position dependency of the machine tool dynamics into account. Preliminary experimental results with IFF and PPF verify the simulation results, as the major effects are observable here as well. Due to its modularity, the chosen approach is easily transferable to machine tools with a comparable structure.