1
GATE ECE 2017 Set 1
MCQ (Single Correct Answer)
+2
-0.6
A linear time invariant (LTI) system with the transfer function $$$G\left(s\right)=\frac{K\left(s^2+2s+2\right)}{s^2-3s+2}$$$ is connected in unity feedback configuration as shown in the figure. GATE ECE 2017 Set 1 Control Systems - Root Locus Diagram Question 8 English

For the closed loop system shown, the root locus for 0 < K < $$\infty$$ intersects the imaginary axis for K = 1.5. The closed loop system is stable for

A
K>1.5
B
1 < K < 1.5
C
0 < K < 1
D
no positive value of K
2
GATE ECE 2016 Set 3
Numerical
+2
-0
The forward-path transfer function and the feedback-path transfer function of a single loop negative feedback control system are given as $$G\left(s\right)=\frac{K\left(s+2\right)}{s^2+2s+2}$$ and H(s) = 1 respectively.If the variable parameter K is real positive, then the location of the breakaway point on the root locus diagram of the system is_____________.
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3
GATE ECE 2016 Set 1
Numerical
+2
-0
The open-loop transfer function of a unity-feedback control system is $$$G\left(s\right)=\frac K{s^2+5s+5}$$$ The value of K at the breakaway point of the feedback control system's root-locus plot is _____________
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4
GATE ECE 2015 Set 3
Numerical
+2
-0
For the system shown in the figure, s = –2.75 lies on the root locus if K is_____. GATE ECE 2015 Set 3 Control Systems - Root Locus Diagram Question 11 English
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