Fuzzy Controlling Interelectrode Gap of ECM Based on 6 Dimensional Forces and Machining Current

Arming to effectively control interelectrode gap of ECM, the 6-dimision forces and machining current are used as primary data of fuzzy controller which includes 2 inputs and 1 output. The interelectrode gap got from on-line monitoring and the initial setting gap compose deviation and deviation´s variety, which are acted as input parameters of fuzzy controller, and the output of fuzzy controller is velocity of machine principal axis. A simulation model consisted of the fuzzy controller and ECM system is established, and the initial setting gap may be modified in the model. Simulation result based on the Simulink module of Matlab shows that the machining process is steady and robust, and machining process arrived at balance status quickly. With interelectrode gap increasing, the overshoot of fuzzy control system declines when interelectrode gap is within 0.2~0.7mm.