智能主轴高速铣削颤振的模糊控制方法研究

In the process of high speed and high efficiency machining of parts such as aeronautical blades, chatter is more likely to occur than low speed cutting process due to the weakening of the damping effect in the cutting process. As one of the main functions of intelligent spindle, chatter monitoring and control is an effective way to solve the chatter problem in high speed and high efficiency machining process. First of all, an active control structure is designed by integrating piezoelectric actuators and displacement sensors into the spindle system. According to the structure, the active control system model is developed. Then, the dynamic characteristics of the active spindle structure are analyzed. Based on that, the control rules and the fuzzy controller are developed. Next, the system equation is obtained through hammer tests and sweep-frequency tests. A numerical example is also performed to analyze the chatter control effects. Finally, chatter control milling experiments are performed. The results show that the proposed active control method can effectively control milling chatter and improve the stability of the milling process.