Mathematical Modeling of Multiple Quality Characteristics of a Laser Microdrilling Process Used in Al7075/SiC_p Metal Matrix Composite Using Genetic Programming

Table 2

Comparison between experimental and predicted values of circularity at R² = 99.68.

No.	PP (W) ()	PF (Hz) ()	AGP (kg/cm^2) ()	PW (ms) ()	Circularity (mm)		Error %
					Experimental	GP
1	250	210	12	0.4	0.908	0.908066	−6.6E − 05
2	210	210	8	0.2	0.9032	0.903074	0.000126
3	240	220	12	0.4	0.911	0.911254	−0.00025
4	210	210	8	0.6	0.953	0.953124	−0.00012
5	250	220	8	0.6	0.9425	0.941842	0.000658
6	210	250	12	0.6	0.978	0.978011	−1.1E − 05
7	210	230	10	0.4	0.948	0.945836	0.002164
8	230	210	10	0.6	0.957	0.958292	−0.00129
9	210	230	10	0.3	0.923	0.922506	0.000494
10	240	210	11	0.3	0.892	0.89308	−0.00108
11	220	210	9	0.3	0.926	0.926227	−0.00023
12	230	230	12	0.3	0.92	0.920843	−0.00084
13	240	220	12	0.3	0.9205	0.920919	−0.00042
14	220	250	8	0.3	0.896	0.895994	6.11E − 06
15	230	210	10	0.5	0.947	0.94698	1.96E − 05
16	240	230	8	0.4	0.899	0.898971	2.94E − 05
17	240	210	11	0.2	0.892	0.893078	−0.00108
18	220	240	12	0.6	0.974	0.973441	0.000559
19	240	250	10	0.6	0.954	0.955555	−0.00155
20	250	250	11	0.4	0.92	0.919789	0.000211
21	250	240	10	0.2	0.894	0.893536	0.000464
22	230	250	9	0.5	0.953	0.949875	0.003125
23	210	250	12	0.5	0.958	0.963079	−0.00508
24	250	240	10	0.3	0.892	0.893537	−0.00154
25	250	220	8	0.5	0.938	0.933247	0.004753
26	250	250	11	0.3	0.895	0.903726	−0.00873
27	230	230	12	0.2	0.893	0.892581	0.000419
28	230	220	11	0.2	0.89	0.892581	−0.00258
29	240	240	9	0.6	0.95	0.949358	0.000642
30	220	240	12	0.2	0.893	0.892039	0.000961
31	250	230	9	0.2	0.896	0.896958	−0.00096
32	220	220	10	0.5	0.951	0.950144	0.000856
33	240	240	9	0.5	0.95	0.943263	0.006737
34	210	220	9	0.2	0.9	0.896232	0.003768
35	220	250	8	0.2	0.902	0.896907	0.005093
36	250	210	12	0.5	0.948	0.94813	−0.00013
37	220	220	10	0.4	0.936	0.923214	0.012786
38	230	240	8	0.3	0.901	0.90405	−0.00305
39	250	230	9	0.6	0.9475	0.947726	−0.00023
40	230	250	9	0.4	0.911	0.928516	−0.01752
41	240	250	10	0.2	0.895	0.895507	−0.00051
42	220	210	9	0.4	0.91	0.90617	0.00383
43	240	230	8	0.5	0.94	0.936347	0.003653
44	210	240	11	0.5	0.951	0.959169	−0.00817
45	220	230	11	0.5	0.95	0.954643	−0.00464
46	220	230	11	0.6	0.97	0.967844	0.002156
47	230	240	8	0.4	0.901	0.906892	−0.00589
48	230	220	11	0.6	0.966	0.964493	0.001507
49	210	240	11	0.4	0.93	0.943397	−0.0134
50	210	220	9	0.3	0.922	0.918336	0.003664

PP: pulse power (W), PF: pulse frequency (Hz), PW: pulse width (ms), AGP: assist gas pressure (Kg/cm³).