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Control Systems
Block Diagram and Signal Flow Graph
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Polar Nyquist and Bode Plot
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State Variable Analysis
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Basics of Control System
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Routh Hurwitz Stability
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Time Response Analysis
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Root Locus Techniques
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Controller and Compensator
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1
GATE EE 2012
MCQ (Single Correct Answer)
+2
-0.6
The transfer function of a compensator is given as $${G_c}\left( s \right) = {{s + a} \over {s + b}}$$

$${G_c}\left( s \right)$$ is a lead compensator if

A
$$a = 1,b = 2$$
B
$$a = 3,b = 2$$
C
$$a = -3,b = -1$$
D
$$a = 3,b = 1$$
2
GATE EE 2012
MCQ (Single Correct Answer)
+2
-0.6
The transfer function of a compensator is given as $${G_c}\left( s \right) = {{s + a} \over {s + b}}$$

The phase of the above lead compensator is maximum at

A
$$\sqrt 2 \,rad/s$$
B
$$\sqrt 3 \,rad/s$$
C
$$\sqrt 6 \,rad/s$$
D
$$1/$$ $$\sqrt 3 \,rad/s$$
3
GATE EE 2008
MCQ (Single Correct Answer)
+2
-0.6
The transfer function of two compensators are given below: $${C_1} = {{10\left( {s + 1} \right)} \over {\left( {s + 10} \right)}},\,{C_2} = {{s + 10} \over {10\left( {s + 1} \right)}}$$

Which one of the following statements is correct?

A
$${C_1}$$ is lead compensator and $${C_2}$$ is a lag compensator
B
$${C_1}$$ is a lag compensator and $${C_2}$$ is a lead compensator
C
Both $${C_1}$$ and $${C_2}$$ are lead compensator
D
Both $${C_1}$$ and $${C_2}$$ are lag compensator
4
GATE EE 2007
MCQ (Single Correct Answer)
+2
-0.6
The system $$900/s(s+1)(s+9)$$ is to be such that its gain crossover frequency becomes same as its uncompensated phase crossover frequency and provides at $${45^0}$$ phase margin . To achieve this, one may use
A
a lag compensator that provides an attenuation of $$20dB$$ and a phase lag of $${45^0}$$ at the frequency of $$3\sqrt 3 $$ rad/s
B
a lead compensator that provides an amplification of $$20dB$$ and a phase lead of $${45^0}$$ at the frequency of $$3$$ rad/s
C
a lag - lead compensator that provides an amplification of $$20dB$$ and a phase alg of $${45^0}$$ at the frequency of $$\sqrt 3 $$ rad/s
D
a lag - lead compensator that provides an attenuation of $$20dB$$ and phase lead of $${45^0}$$ at the frequency of $$3$$ rad/s
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Questions Asked from Marks 2
GATE EE 2025 (1) GATE EE 2012 (2) GATE EE 2008 (1) GATE EE 2007 (1) GATE EE 2000 (1)
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement