Q201
Open questionIn Routh's-Hurwitz criterion, if there are changes of signs in the elements of the first column, then the number of sign changes indicates
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Control Systems
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Q202
Open questionWhile forming Routh's array, the situation of a row of zeros indicates that the system
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Q203
Open questionIf the roots of the characteristic equation s2 + a1s + a2 = 0 of a network are negative real and unequal, then the system is:
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Q204
Open questionWhat is represented by state transition matrix of a system?
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Q205
Open questionThe bode plot is applicable to:
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Q206
Open questionIn the field-controlled motor, the entire damping comes from:
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Q207
Open questionPhase of the transfer function of the following circuit is:
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Q208
Open questionThe Bode plot of the transfer function G(s) = s is:
1. Constant magnitude
2. 20 dB/decade
3. Constant phase shift angle
4. Constant phase shift of
Which of these are correct?
1. Constant magnitude
2. 20 dB/decade
3. Constant phase shift angle
4. Constant phase shift of
Which of these are correct?
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Q209
Open questionWhat is the transfer function of a phase lead compensator? The values of β and τ are given as β < 1 and τ > 0.
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Q210
Open questionFor the system described by = AX match List-I with List-II and select the correct answer.
| List-I (Matrix A) | List-II (Position of eigen values) |
| a. \left[ {\begin{array}{*{20}{c}} { - 1}&2\\ 0&{ - 2} \end{array}} \right] | 1. One eigen value at the origin |
| b. \left[ {\begin{array}{*{20}{c}} { - 1}&{ - 2}\\ { - 2}&{ - 4} \end{array}} \right] | 2. Both the eigen value in the LHP |
| c. \left[ {\begin{array}{*{20}{c}} 0&{ - 1}\\ 1&0 \end{array}} \right] | 3. Both the eigen values in RHP |
| d. \left[ {\begin{array}{*{20}{c}} 1&0\\ 2&4 \end{array}} \right] | 4. Both the eigen values on the imaginary axis |
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Q211
Open questionThe Nyquist plot of:
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Q212
Open questionA phase lead compensating network has its transfer function The maximum phase lead occurs at a frequency of:
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Q213
Open questionWhich one of the following compensation is adopted for improving transient response of a negative unity feedback system?
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Q214
Open questionA liquid level controller linearly converts a displacement of 2 m to 3 m into 4-20 mA control signal. A relay serves as two position controller to open and close an inlet valve. Relay closes at 12 mA and opens at 10 mA. The hysteresis zone is:
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Q215
Open questionGiven the system transfer function the corner frequencies in rad/s are
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Q216
Open questionA second order LTI system is described by the following state equations
x1(t) - x2(t) = 0
x2(t) + 2x1(t) + 3x2(t) = r(t) where x1(t) and x2(t) are the two state variables and r(t) denotes the input. The output c(t) = x1(t).
The system is
x1(t) - x2(t) = 0
x2(t) + 2x1(t) + 3x2(t) = r(t) where x1(t) and x2(t) are the two state variables and r(t) denotes the input. The output c(t) = x1(t).
The system is
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Q217
Open questionWhere are the K = ±∞ points on the root loci of the characteristic equation of the closed loop control system located at?
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Q218
Open questionThe feedback control system in the figure is stable.
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Q219
Open questionConsider the characteristic equation of a control system given by s3 + (K + 0.5)s2 + 4Ks + 50 = 0. Find the value of K for the system to have sustained oscillations.
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Q220
Open questionThe open-loop transfer function of a system is given by In the straight line approximation of the Bode plot, |G(jω) H(jω)| and ∠G(jω) H(jω) at ω = 100 rad/s are:
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