Piezo-based actuator-sensor-units for uniaxial vibration reduction in machine tools

Additional piezo-based components in drive trains can significantly improve the dynamic behavior of machine tools. The article presents components that are based on the differential setup. Due to the nonexistence of calculation algorithms the impact of piezoceramic actuators in machinery will usually not be achieved. By using an electro-mechanical analogy for mapping the properties of the piezo actuator, it is possible to establish calculation models that provide both the essential electrical current of the amplifier and the detailed stiffness analysis. To illustrate this the authors explain the actuator-sensor-unit for compensating axial vibration in a feed axis with a ball screw drive. In conclusion, the actuator-sensor-unit has been successfully analyzed and the calculation verified. A further example of an actuator-sensor-unit for a parallel kinematic machine is explained.