Automatic Control Systems - Section 1 (2)
Automatic Control Systems - Section 1
| 9. | Bode magnitude plot is drawn between |
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Answer: Option B Explanation: Frequency is plotted on log scale and magnitude is taken in dB. |
| 10. | For the control system in the given figure, the value of K for critical damping is |
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since ζ = 1, ωn = 3.5 Hence 2 + 2k = 3.52 = 12.25 or K = 5.125 .
| 12. | A negative feedback system has |
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Answer: Option D Explanation: Find characteristic equation. |
The closed loop system is stable for| 13. | In the given figure x6 = |
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Answer: Option A Explanation: The input x1 is multiplied by a, x2, by b and x3 by c. The sum total is multiplied by d and e. |
| 14. | In the given figure the input is x(t) = A sin ωt. The steady state output y(t) = |
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Answer: Option B Explanation: The magnitudes A and G(jω) are multiplied and phase angles are added. |
| 15. | In Bode diagram (log magnitude plot) the factor |
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Answer: Option C Explanation: |
in the transfer function gives a line having slope| 16. | In an integral controller |
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Answer: Option B Explanation: Output is proportional to integral of input or rate of change of output is proportional to input. |