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Anonymous

Asked: August 31, 2022In: control systems engineering

3. The state equations of a system are given by x_ ¼ X þ u;y ¼ X. The system is (a) Controllable and observable (b) Controllable but not completely observable (c) Neither controllable nor completely observable (d) Not completely controllable but observable

Anonymous

Asked: August 30, 2022In: control systems engineering

154. Match List I (frequency response) with List II (time response), and select the correct answer using the code given below the lists:

Anonymous

Asked: August 30, 2022In: control systems engineering

153. For a stable closed-loop system, the gain at the phase cross-over frequency should always be:

Anonymous

Asked: August 30, 2022In: control systems engineering

152. Which of the following methods can determine the closed-loop system resonance frequency of operation? (a) Root locus method (b) Nyquist method (c) Bode plot (d) M and N circle method

Anonymous

Asked: August 30, 2022In: control systems engineering

151. If the gain of the loop system is doubled, the gain margin of the system is: (a) Not affected (b) Doubled (c) Halved (d) One fourth of original value

Anonymous

Asked: August 30, 2022In: control systems engineering

113. Match List I (Nyquist plot of loop-transfer function of a control system) with List II (Gain margin in dB), and select the correct answer using the code given below the lists.

venkyelectrical

Asked: August 29, 2022In: control systems engineering

76. Consider the following statements with regard to the bandwidth of a closed-loop system: 1. In a system, where the low-frequency magnitude is 0 dB on the Bode diagram, the bandwidth is measured at the 3-dB frequency. 2. The bandwidth of the closed-loop control system is a measurement of the range of fidelity of response of the systems. 3. The speed of response to a step input is proportional to the bandwidth. 4. The system with the larger bandwidth provides a slower step response and lower fidelity ramp response. Which of the statements give above are correct? (a) 1, 2 and 3 (b) 1, 2 and 4 (c) 1, 3 and 4 (d) 2, 3 and 4

venkyelectrical

Asked: August 29, 2022In: control systems engineering

63. With negative feedback in a closed-loop control system, the system sensitivity to parameter variations: (a) Increases (b) Decreases (c) Becomes zero (d) Becomes infinite

venkyelectrical

Asked: August 29, 2022In: control systems engineering

62. For the minimum phase system to be stable: (a) Phase margin should be negative and gain margin should be positive. (b) Phase margin should be positive and gain margin should be negative. (c) Both phase margin and gain margin should be positive. (d) Both phase margin and gain margin should be negative.

venkyelectrical

Asked: August 28, 2022In: control systems engineering

27. An open-loop transfer function of a feedback system has m poles and n zeros (m > n). Consider the following statements: 1. The number of separate root loci is m. 2. The number of separate root loci is n. 3. The number of root loci approaching infinity is (m n). 4. The number of root loci approaching infinity is (m þ n). Which of the statements given above are correct? (a) 1 and 4 (b) 1 and 3 (c) 2 and 3 (d) 2 and 4

1 2 3

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