Electronics and Communication Engineering - Automatic Control Systems - Discussion

12. 

For the system in the given figure, the characteristic equation is

[A]. s2 + s(3 + 6a) + 6 = 0
[B]. s2 + s(3 + 12a) + 12 = 0
[C]. s2 + 3s = 0
[D]. s2 + 6s = 0

Answer: Option A

Explanation:

Transfer function to inner loop = .

Then .

The characteristic equation is s2 + 3s + 6as + 6 = 0.


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