Compensators · Control Systems · GATE ECE

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Marks 1

GATE ECE 2017 Set 2
Which of the following statement is incorrect?
GATE ECE 2017 Set 1
Which of the following can be the pole-zero configuration of a phase-lag controller (lag compensator)?
GATE ECE 2015 Set 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 positiv...
GATE ECE 2009
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 magn...
GATE ECE 2008
The pole-zero plot given below corresponds to a ...
GATE ECE 2006
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 provi...
GATE ECE 2003
A PD controller is used to compensate a system. Compared to the uncompensated system, the compensated system has
GATE ECE 1998
The transfer function of a phase lead controller is $${\textstyle{{1 + 3Ts} \over {1 + Ts}}}.$$ The maximum value of phase provided by this controlle...

Marks 2

GATE ECE 2015 Set 3
The position control of a DC servo-motor is given in the figure. The values of the parameters are Kt=1 N-m/A, Ra=$$1\Omega ,$$ La=0.1H, J=5kg-m2, B=1 ...
GATE ECE 2015 Set 1
A lead compensator network includes a parallel combination of 'R' and 'C' in the feed-forward path. If the transfer function of the compensator is $${...
GATE ECE 2012
The transfer function of a compensator is given as $${G_C}(s) = {{s + a} \over {s + b}}.$$ $${G_C}(s)$$ is a lead compensator if
GATE ECE 2012
The transfer function of a compensator is given as $${G_C}(s) = {{s + a} \over {s + b}}.$$ The phase of the above lead compensator is maximum at...
GATE ECE 2010
A unity negative feedback closed loop system has a plant with the transfer function $$G(s) = {1 \over {{s^2} + 2s + 2}}$$ and a controller $${G_c}(s...
GATE ECE 2008
Group I gives two possible choices for the impedance Z in the diagram. The circuit elements in Z satisfy the condition $${R_2}{C_2} > {R_1}{C_{1.}}...
GATE ECE 2007
The open-loop transfer function of a plant is given as $$G(s) = {1 \over {{s^2} - 1}}.$$ If the plant is operated in a unity feedback configuration, ...
GATE ECE 2007
A control system with a PD controller is shown in the figure. If the velocity error constant $${K_v} = 1000$$ and the damping ratio $$\zeta = 0.5,$$...
GATE ECE 2005
A double integrator plant, $$G(s) = {K \over {{s^2}}},H(s) = 1$$ is to be compensated to achieve the damping ratio $$\zeta = 0.5$$ and an undamped ...
GATE ECE 1992
A process with open-loop model $$G(s) = {{K{e^{ - s{\tau _d}}}} \over {\tau s + 1}},$$ is controlled by a PID controller. For this process
GATE ECE 1990
The transfer function of a simple RC network functioning as a controller is: $${G_c}(s) = {{s + {z_1}} \over {s + {p_1}}}$$ The condition for the RC...

Marks 5

GATE ECE 2002
A unity feedback system has the plant transfer function Gp(s)=$${1 \over {\left( {s + 1} \right)\left( {2s + 1} \right)}}$$ (a) Determine the freque...
GATE ECE 2001
For the feedback control system shown in the figure, the process transfer function is Gp(s) = $${1 \over {s(s + 1)}},$$ and the amplification factor ...

Marks 8

GATE ECE 1987
A system with derivative control is shown in figure. (a)Determine the transfer function and the characteristic equation of the system. (b)Given that ...
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