1
GATE ECE 2015 Set 3
MCQ (Single Correct Answer)
+1
-0.3
The transfer function of a first-order controller is given as $${G_c}(s) = {{K\left( {s + a} \right)} \over {s + b}}$$

where k, a and b are positive real numbers. The condition for this controller to act as a phase lead compensator is

A
a < b
B
a > b
C
K < ab
D
K > ab
2
GATE ECE 2009
MCQ (Single Correct Answer)
+1
-0.3
The magnitude plot of a rational transfer function G(s), with real coefficient is shown in figure. Which of the following compensators has such a magnitude plot? GATE ECE 2009 Control Systems - Compensators Question 18 English
A
Lead compensator
B
Lag compensator
C
PID controller
D
Lea-lag compensator
3
GATE ECE 2008
MCQ (Single Correct Answer)
+1
-0.3
The pole-zero plot given below corresponds to a GATE ECE 2008 Control Systems - Compensators Question 19 English
A
Low pass filter
B
High pass filter
C
Band pass filter
D
notch filter
4
GATE ECE 2006
MCQ (Single Correct Answer)
+1
-0.3
The transfer function of a phase-lead compensator is given by $${G_c}(s) = {{1 + 3Ts} \over {1 + Ts}}$$

where T > 0. The maximum phase-shift provided by such a compesator is

A
$${\raise0.5ex\hbox{$\scriptstyle \pi $} \kern-0.1em/\kern-0.15em \lower0.25ex\hbox{$\scriptstyle 2$}}$$
B
$${\raise0.5ex\hbox{$\scriptstyle \pi $} \kern-0.1em/\kern-0.15em \lower0.25ex\hbox{$\scriptstyle 3$}}$$
C
$${\raise0.5ex\hbox{$\scriptstyle \pi $} \kern-0.1em/\kern-0.15em \lower0.25ex\hbox{$\scriptstyle 4$}}$$
D
$${\raise0.5ex\hbox{$\scriptstyle \pi $} \kern-0.1em/\kern-0.15em \lower0.25ex\hbox{$\scriptstyle 6$}}$$
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