Consider the system of Fig. P6.4-4. This system is called a regulator control system, in which it

Question:

Consider the system of Fig. P6.4-4. This system is called a regulator control system, in which it is desired to maintain the output, c(t) , at a value of zero in the presence of a disturbance, f (t) . In this problem the disturbance is a unit step. r(t)=0 T= 0.1 s D(z) 1-e-Ts S f(t) = u(t) Figure P6.4-4 System for Problem 6.4-4. 6 s+2 (a) With D(z)= 1 (i.e., no compensation) find the steady-state value of c(t). (b) For f(t) to have no effect