Stability Analysis of a given system Using Polar Plot
Select the transfer function
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Find the values of Gain and Phase angle for the frequencies given
Frequency (rad/sec)
Gain, A(ω) (dB)
Phase Angle, ɸ(ω) (Degree)
-5
1
1.414
1.5
2
10
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Hint
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Frequency (rad/sec)
Gain, A(ω) (dB)
Phase Angle, ɸ(ω) (Degree)
-5
3.47
-131
1
1.26
-162
1.414
0.67
-180
1.5
0.59
-183
2
0.31
-198
10
0.004
-235
You have selected this equation
Find the values of Gain and Phase angle for the frequencies given
Frequency (rad/sec)
Gain, A(ω) (dB)
Phase Angle, ɸ(ω) (Degree)
0.5
1
1.5
2
10
Check Answer
Show Answer
Hint
----------
Show Graph
Frequency (rad/sec)
Gain, A(ω) (dB)
Phase Angle, ɸ(ω) (Degree)
0.5
11.64
-194
1
2.68
-207
1.5
1.07
-217
2
0.53
-225
1o
0.006
-259
1. The system is called be marginally stable, if
(Choose 1 answer)
Phase crossover frequency < Gain crossover frequency
Phase crossover frequency = Gain crossover frequency
2. Find phase crossover frequency in rad/sec, if transfer function A(s) B(s) = 1/s(s+1)(s+0.5)
(Choose 1 answer)
0.707
0.9
3. A system with zero phase margin and unity gain margin is
(Choose 1 answer)
Oscillatory
Sluggish
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