Application of an Actively Controlled Magnetostrictive Actuator to Vibration Abatement in the Turning Process

An active vibration control system for a turning process is presented. The system employs a magnetostrictive actuation and a rate feedback control scheme to suppress vibration in the turning process. A specially designed tool holder is developed to implement the actuation and the control scheme effectively. A model for the control system is described. The model accounts for the dynamic response of the cutting process and the control system. The effectiveness of the vibration control system is studied via a series of experiments. A disturbance force is applied to the system by a shaker and the dynamic response of the system is observed. The experimental data show that the rate feedback control scheme can adds additional damping to the system and reduces the vibration. Finally, a cutting experiment is conducted using the controlled system and the experimentally obtained surface profiles are compared to the surface profiles obtained without the vibration control. It is shown that the system can improve the surface texture generated by the turning process.