A unity feedback closed-loop system contains an open-loop transfer function 9
G(S) =
s(s+ S)
A factor D(s) = ks + I is cascaded with G(s), where K is an adjustable gain, as
shown in Fig. 3.17.
V(8)
Dis)
G(s)
Y(s)
Fig. 3.17
(a) Find the value of K necessary to provide a critically damped closed-loop
system.
(b) Find the range of values of K which will provide acceptable damping for
the closed-loop system.
(c) What is the magnitude of overshoot which follows a unit step input, when
K=0.1?