b)

b)

a)

b)

03000CH302052002

Sketch the Bode plot and using Bode stability criterion find the limiting value of K
for stability. Also determine gain margin and phase margin.
Find out amplitude ratio and phase lag of dead time process by substitution rule.

Sketch the Nyquist plot for the system whose open loop transfer function is

G(s) =——

F142)" Find the range of K for stability.

Explain the process reaction curve method to determine the controller parameters
of a feedback control system.

Using Ziegler-Nichols tuning rules, determine the settings of PID controllers for a
process whose open loop transfer function is given by

5 70.25

(ऽ + 1)(0.5s + 1)
Describe on Distributed Control System(DCS) and supervisory control and data

acquisition (SCADA).

G(s) =

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