Optimization of green electrical discharge machining using an integrated approach

This paper presents an integrated approach of Entropy-Technique for Order Preference by Simulation of Ideal Solution (TOPSIS) method for the determination of the optimal process parameters in green electrical discharge machining. In this work, initially, an experiment is performed using Taguchi experimental technique. Thereafter, Entropy-TOPSIS is used to convert multi-response parameters into single response parameter. Finally, the ranking of the parameter decides the best experimental set up and optimized the input process parameters. In this research, the weight of the quality characteristics of each of the output parameters are determined by the entropy method which influences the closeness coefficient values for finding the optimal experimental set up using TOPSIS method. On the basis of optimization results it has been found that peak current (4.5 A), pulse duration (261 μs), dielectric level (80 mm) and flushing pressure (0.3 kg/cm²), which are the best combinations of this analysis.