Control concept for piezo-based actuator-sensor-units for uniaxial vibration damping in machine tools

摘要

Additional piezo-based components in drive trains can significantly improve the dynamic behaviour of machine tools. In this article we present a piezo-based actuator-sensor-unit that is able to reduce uniaxial vibrations in ball screw driven feed axis of machine tools. A complex model of a feed axis including ASU was developed to design a controller. The control concept is based on the direct velocity feedback. A modular test bench was designed, assembled and investigated to verify the ASU's suitability for different feed axis configurations. In conclusion, the results for the different configurations where evaluated regarding economical aspects.