Active chatter control in high speed milling processes based on H∞ almost disturbance decoupling problem

Abstract

High speed milling is commonly used to improve the cutting efficiency. However, chatter is still an obstacle limiting the performance of high speed milling. In this work, an active chatter control strategy is proposed based on H∞ almost disturbance decoupling problem. Firstly, a cutting force model is introduced to simulate the milling force under given milling conditions. Then, the cutting force model is coupled with transfer functions of the original system to simulate the whole milling process and the regenerative chatter. Next, the controller is calculated based on H∞ almost disturbance decoupling problem and the closed-loop bode diagram is compared with the open-loop bode diagram. Finally, the vibration responses with and without control are compared and the effect of controller parameter adjustment is presented.