: [ G_c(s) = K_c \left(1 + \frac1\tau_i s\right)(\tau_d s + 1) ]
:
| Controller | ( K_p ) | ( \tau_i ) | ( \tau_d ) | |------------|----------|--------------|--------------| | P | ( 1/a ) | – | – | | PI | ( 0.9/a ) | ( 3.33 L ) | – | | PID | ( 1.2/a ) | ( 2 L ) | ( 0.5 L ) | control systems engineering exam reference manual