Active control of high-frequency tool-workpiece vibration in micro-grinding

The high-frequency tool-workpiece vibration in micro-grinding plays a pivotal role in influencing surface generation in micro-grinding. To overcome the problems coming with the process vibration, this paper presents the implementation and testing of an active vibration control platform that can be used to suppress the high-frequency relative vibrations between the tool and the workpiece during the micro-grinding processes. The platform with small actuator displacement and high-resonance frequency is applied as workpiece holding platform and can cancel vibration in real time by sensing the tool vibration with the vibrometer. The active control system developed here is based on an adaptive filtering algorithm; the tool vibrations and relative vibrations in micro-grinding process are treated as system disturbances and control target respectively. Cutting experiments are performed to demonstrate the vibration reduction and to validate the effectiveness of the control system; the results show that the developed system works well in micro-grinding vibration cancelation.