A method for varying the spindle speed using chaotic signal to suppress chatter in machining is developed. The effects of spindle speed variation on cutting chatter control between using chaotic and sinusoidal signals were analyzed by simulation and experimental methods. Various chaotic codes are used in the chatter suppression process, and it is found that LORENZ-1 code results in the smallest machine noise.

The control methods for chaotic chatter in the cutting process were studied based on the model of chaotic chatter developed by Grabec.The SIMULINK model of chaotic chatter in the cutting process was upbuilt and the time se- ries of chaotic chatter dynamic response were given based on the SIMULINK model.Several SIMULINK models,such as noise-induced order model,periodical perturbation model and time delay coordinates model were established respectively to simulate the control of chaotic chatter.The simulation results show that the time delay coordinates method is more effec- tive to control the chaotic chatter especially when the control is applied smuhaneously in horizontal and vertical directions.