Research Article

A Hybrid Computational Method of Desirability, Fuzzy Logic, ANFIS, and LAPO Algorithm for Multiobjective Optimization Design of Scott Russell Compliant Mechanism

Table 23

Comparison of the optimal results for three cases.

Case studyMethodOptimal factorsOptimal responses
Frequency (Hz)Displacement (mm)Stress (MPa)MPCI

Case 1Hybrid of Taguchi method and fuzzy logicD = 2.25 mm
L3 = 8.5 mm
L4 = 18.7 mm
Predicted:
F1 = 24.4574
FEA:
F1 = 26.283
ε = 6.94%
Predicted:
F2 = 0.1691
FEA:
F2 = 0.1772
ε = 4.57%
Predicted:
F3 = 251.463
FEA:
F3 = 259.42
ε = 3.06%
0.510
Proposed hybrid approach of fuzzy-ANFIS-LAPO algorithmD = 2.30 mm
L3 = 8.5 mm
L4 = 18.7 mm
Predicted:
F1 = 26.592
FEA:
F1 = 25.828
ε = 2.95%
Predicted:
F2 = 0.1679
FEA:
F2 = 0.1766
ε = 4.92%
Predicted:
F3 = 253.847
FEA:
F3 = 260.570
ε = 2.58%
0.570

Case 2Hybrid of Taguchi method and fuzzy logicθ = 16.5o
L1 = 7.7 mm
L2 = 18.7 mm
D = 2.25 mm
Predicted:
F1 = 28.9482
FEA:
F1 = 649.3
ε = 2.58%
Predicted:
F2 = 0.1527
FEA:
F2 = 0.1782
ε = 9.55%
Predicted:
F3 = 7.9628
FEA:
F3 = 7.8629
ε = 1.28%
0.375
Proposed hybrid approach of fuzzy-ANFIS-LAPO algorithmθ = 16.5o
L1 = 8.0 mm
L2 = 14.5 mm
D = 2.5 mm
Predicted:
F1 = 651.08
FEA:
F1 = 682.8535
ε = 4.65%
Predicted:
F2 = 0.1981
FEA:
F2 = 0.1907
ε = 3.88%
Predicted:
F3 = 4.4641
FEA:
F3 = 4.288
ε = 4.10%
0.517

Case 3Hybrid of Taguchi method and fuzzy logicL1 = 7.7 mm
L3 = 10.1625 mm
D = 2.25 mm
Predicted:
F1 = 158.970
FEA:
F1 = 27.175
ε = 484%
Predicted:
F2 = 0.0957
FEA:
F2 = 0.0443
ε = 116%
Predicted:
F3 = 155.8
FEA:
F2 = 86.112
ε = 80%
0.496
Proposed hybrid approach of fuzzy-ANFIS-LAPO algorithmL1 = 6.3793 mm
L3 = 9.73 mm
D = 2.25 mm
Predicted:
F1 = 27.0063
FEA:
F1 = 27.178
ε = 6.31%
Predicted:
F2 = 0.2203
FEA:
F2 = 0.2233
ε = 1.34%
Predicted:
F3 = 332.8096
FEA:
F2 = 343.3
ε = 0.03%
0.611