The nyquist plot for a unity feedback control system having open loop transfer function G(s) = K(1-s)/(s+1)is shown in figure below :The system isa)stable for all values of Kb)stable for K andgt; 1c)unstable for K andgt; 1 and stable for K andlt; 1d)unstable for K andlt; 1Correct answer is option 'C'. Can you explain this answer? - EduRev Electrical Engineering (EE) Question

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The nyquist plot for a unity feedback control system having open loop transfer function G(s) = K(1-s)/(s+1) is shown in figure below :

The system is

a)
stable for all values of K
b)
stable for K > 1
c)
unstable for K > 1 and stable for K < 1
d)
unstable for K < 1

Correct answer is option 'C'. Can you explain this answer?

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Test: Frequency Domain Analysis of Control Systems- 3

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The nyquist plot for a unity feedback control system having open loop ...

Given,
G(s)H(s) = K(1-s)/(s+1)
or,

Thus, the radius of Nyquist plot will be K.
Now, no.of open loop poles in RH s-piane = 0.
When K > 1, no. of encirclement, N = -1
When K< 1, no. of encirclement, N = 0
Thus, for K > 1, N = P - Z
or, -1 = 0 - Z or Z = 1
∴ System is unstable.
For K < 1, N = P - Z or 0 = 0 - Z or Z = 0
∴ System is stable..

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The nyquist plot for a unity feedback control system having open loop transfer function G(s) = K(1-s)/(s+1)is shown in figure below :The system isa)stable for all values of Kb)stable for K > 1c)unstable for K > 1 and stable for K < 1d)unstable for K < 1Correct answer is option 'C'. Can you explain this answer?

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The nyquist plot for a unity feedback control system having open loop transfer function G(s) = K(1-s)/(s+1)is shown in figure below :The system isa)stable for all values of Kb)stable for K > 1c)unstable for K > 1 and stable for K < 1d)unstable for K < 1Correct answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about The nyquist plot for a unity feedback control system having open loop transfer function G(s) = K(1-s)/(s+1)is shown in figure below :The system isa)stable for all values of Kb)stable for K > 1c)unstable for K > 1 and stable for K < 1d)unstable for K < 1Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The nyquist plot for a unity feedback control system having open loop transfer function G(s) = K(1-s)/(s+1)is shown in figure below :The system isa)stable for all values of Kb)stable for K > 1c)unstable for K > 1 and stable for K < 1d)unstable for K < 1Correct answer is option 'C'. Can you explain this answer?.

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