Positioning Control of Electrical Discharge Machining Device for Improved Transient Response Performance

Abstract

Electrical discharge machining (EDM) has experienced steady growth in engineering applications since its emergence. This paper has presented positioning control of electrical discharge machining (EDM) device for improved transient response performance. A model dynamic of a DC servomotor responsible for positioning tool electrode on a workpiece was obtained. The controlled variable is the angular shaft position which was made the output of the process in the model transfer function. A proportional integral and derivative (PID) compensator was designed using robust response time tuning method with interactive, adjustable performance and robustness of the Matlab control tool box. The designed compensator was integrated with the servomotor to form a closed loop control system. Simulations were performed for uncompensated and compensated conditions of the machining process. The results obtained indicated that with the compensator in the loop, the transient response performance of the servo positioning was largely improved.

Comparison between Bang-Bang, PID and LQR Controller for Electrical Discharge Machining Process

“…Paulinus Chinaenye Eze et al [3] developed the mathematical model for the servo positioning system. In this instance, a dependable PID controller was developed and incorporated with the EDM servo motor block in order to enhance the system's capacity to respond to transient conditions.…”

“…Using simulation [3], a PID controller is integrated with the EDM Process System to test its controllability and efficacy in the EDM machining process. The PID controller was implemented to create better servo motor controllability than the Bang-Bang Controller.…”