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?

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)