Adaptive spindle-speed selection for chatter avoidance to achieve high-precision NC machining based on semi-discretization method

Chatter vibration highly limits the accuracy and the material removal rate of numerical control (NC) machining operations. In this paper, an adaptive spindle speed selection method, based on an analysis using the semi-discretization method, is proposed to avoid and minimize chatter vibration in high-precision NC machining. Moreover, the proposed method is robust to modeling uncertainty and changing process conditions. The experimental results confirm the effectiveness of the proposed method.