The maximum value of a P controller using Routh’s criterion for a control loop with the following characteristics has to be determined. One first order capacity with T 1 = 1 min and K 1 = 2; six...

The maximum value of a P controller using Routh’s criterion for a control loop with the following characteristics has to be determined. One first order capacity with T₁
= 1 min and K₁
= 2; six capacities in series each with T₂
= 1 min, K₂
= 1; one control valve behaving capacitive with T_cv
= 2 s, K_cv
= 1.5.