Unit-feedback control systems have the following block diagram.
R(s)
G(s)
C(s)
100
(1) If G(s) = \frac{100}{(0.1s+1)(s+5)} and input r(t) = 2u(t), what is the static error? [1: stability of the
closed-loop system, 1: static error in response to a step input]
50
(2) If G(s) = \frac{50}{s(0.1s+1)(s+5)} and input r(t) = (2 + 2t)u(t), what is the static error? [1: stability
of the closed-loop system, 1: static error in response to a step input, 1: static error in response
to a ramp input, 1: superposition principle]
