1
GATE ECE 1992
MCQ (Single Correct Answer)
+2
-0.6
A process with open-loop model $$G(s) = {{K{e^{ - s{\tau _d}}}} \over {\tau s + 1}},$$ is controlled by a PID controller. For this process
A
the integral mode improves transient performance
B
the integral mode improves steady state performance
C
the derivative mode improves transient performance
D
the derivative mode improves steady state performance
2
GATE ECE 1990
MCQ (Single Correct Answer)
+2
-0.6
The transfer function of a simple RC network functioning as a controller is: $${G_c}(s) = {{s + {z_1}} \over {s + {p_1}}}$$

The condition for the RC network to act as a phase lead controller is:

A
$${p_1} < {z_1}$$
B
$${p_1} = 0$$
C
$${p_1} = {z_1}$$
D
$${p_1} > {z_1}$$
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