Study on Application of Interval Type 2 Fuzzy Logic Control for Gap Width Controller Used in EDM Machine

Abstract

This paper presents a new method for controlling the gap distance in an EDM machine. Existing gap width control method using PI controller does not perform efficiently in a highly nonlinear and time-variant process such as EDM. In this method, constant tuning of the PI controller is required to achieve a stable and efficient EDM process. The new gap control method present in this paper uses an artificial intelligent type 2 fuzzy logic control to control the gap distance between the electrode and the workpiece. The main advantage of this proposed method is its robustness that would rid the practitioners from the tedious tuning job and would provide the industry with better accuracy and confidence in the control performance.

Evaluation of the High Performance Indirect Field Oriented Controlled Dual Induction Motor Drive Fed by a Single Inverter using Type-2 Fuzzy Logic Control

“…The fuzzy logic control based on Type 2 Fuzzy Sets (T2-FS) present a suitable solution for the control of non-linear systems [29]. T2-FS were first proposed in [33][34][35] as an extension to Type 1 Fuzzy Sets (T1-FS), to increase the fuzziness of the relations.…”

“…The membership functions used for the inputs and the output are presented in Figures 7 and 8. The T2-FLC in Figure 6 is characterized by IF-THEN fuzzy rules-base, but its antecedents and consequents are now T2-FS [29,31,32]. The use of a T2-FLC proves to be more advantageous than the use of a PI/PID controller, thanks to its modifiable control surface which offers better performance, especially when the order of the system is greater than two, while it includes oscillatory modes [30].…”