Fig. 4

The literature controller structure: (a) PIDF-(1 + FOD), (b) PIFOD-(1 + PI), (c) PDF-(1 + PI), (d) PD-PI, and (e) (1 + PI)-PI-PID.

The literature controller structure: (a) PIDF-(1 + FOD), (b) PIFOD-(1 + PI), (c) PDF-(1 + PI), (d) PD-PI, and (e) (1 + PI)-PI-PID.