Table 1 Center and width of Gaussian membership functions before and after optimization for the nonlinear difference equation example
From: T-S fuzzy systems optimization identification based on FCM and PSO
Before optimization | After optimization | |||||
|---|---|---|---|---|---|---|
Center (vc∗r) | −0.1430 | 0.7568 | 0.7568 | −1.5403 | −1.6843 | −1.6839 |
0.6456 | 2.2100 | 2.2100 | −0.4553 | −0.4047 | −0.4027 | |
0.9755 | 2.9367 | 2.9367 | 0.6287 | 1.0216 | 1.0139 | |
1.1735 | 3.3726 | 3.3726 | 1.6045 | 2.5294 | 2.5254 | |
Width (bc∗r) | 0.4000 | 0.4000 | 0.4000 | 2.4092 | 1.0312 | 1.0561 |
0.4000 | 0.4000 | 0.4000 | 3.0067 | 3.4380 | 3.2153 | |
0.4000 | 0.4000 | 0.4000 | 4.6322 | 0.7850 | 0.6624 | |
0.4000 | 0.4000 | 0.4000 | 5.9032 | 1.8199 | 1.5576 | |