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Table 5.
Comparison of RSM-predicted, ANN predicted and experimental results at RSM-based optimal parametric setting.
| Expt. | Experimental results | RSM predicted results | ANN predicted results | Percentage of prediction error in RSM approach | Percentage of prediction error in ANN approach |
|---|---|---|---|---|---|
| Nearer feasible setting of RSM predicted optimal parametric setting | Surface roughness, Ra = 5.91 µm | Surface roughness, Ra = 5.63 µm | Surface roughness, Ra = 5.72 µm | 4.74 | 3.21 |
| (Avg. power = 7.81 watt; Pulse Freq. = 5600 Hz; Rotating sp. = 436 rpm; Air press. = 0.30 kg-cm−2; Y feed rate = 0.443 mm/s) | Turning depth deviation = 0.00021 mm | Turning depth deviation = −0.00020 mm | Turning depth deviation = 0.000203 mm | 4.76 | 3.33 |
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