Q241
Open questionFind the locations of any two roots of the characteristic equation F(s) = s4 + 2s3 + 11s2 + 18s + 18 = 0.
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ECE · all questionsControl Systems
Control Systems
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Q242
Open questionThe unit step response of the above system is given by
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Q243
Open questionIf the closed-loop transfer function of a control system is given as then it is
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Q244
Open questionThe pole-zero plot is shown here when the DC gain is equal to 20. The system transfer function is . . . . . . . .
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Q245
Open questionIn the case of a second order system described by the differential equation,
(where θ1 and θ0 are input and output shaft angles), the natural frequency is given by:
(where θ1 and θ0 are input and output shaft angles), the natural frequency is given by:
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Q246
Open questionFor a lead compensator, whose transfer function is given by
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Q247
Open questionThe magnitude and phase relationship between the sinusoidal input and the steady-state output of a system is called as:
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Q248
Open questionConsider the following for a variable reluctance stepper motor used in system:
1. The stator torque acting on the rotor is a function of angular misalignment between stator and rotor teeth.
2. There are two positions of zero torque: (T = number of rotor teeth)
3. Both the torque zero positions are stable.
4. As the stator is excited, the rotor is pulled into the nearest minimum reluctance position.
Of these statements
1. The stator torque acting on the rotor is a function of angular misalignment between stator and rotor teeth.
2. There are two positions of zero torque: (T = number of rotor teeth)
3. Both the torque zero positions are stable.
4. As the stator is excited, the rotor is pulled into the nearest minimum reluctance position.
Of these statements
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Q249
Open questionConsider the following statements:
The Gain margin and Phase margin of an unstable system may respectively be:
1. Positive, negative
2. Negative, positive
3. Negative, negative
Which of the above statements is/are correct?
The Gain margin and Phase margin of an unstable system may respectively be:
1. Positive, negative
2. Negative, positive
3. Negative, negative
Which of the above statements is/are correct?
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Q250
Open questionA system's open loop transfer function is given by If system is having a unity negative feedback, which of the following is true for such system to be stable?
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Q251
Open questionThe system represented by the state variable model \mathop X\limits^. = \left[ {\begin{array}{*{20}{c}}
0&{ - 1}\\
1&{ - 2}
\end{array}} \right]X + \left[ \begin{array}{l}
1\\
2
\end{array} \right]U is:
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Q252
Open questionConsider unity feedback system with forward path transfer function what are the values of peak time and settling time?
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Q253
Open questionA system with gain margin close to unity or a phase margin close to zero is:
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Q254
Open questionConsider the state space system expressed by the signal flow diagram in the figure.
The corresponding system is
The corresponding system is
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Q255
Open questionThe loop transfer function of an LTI system is For K > 0, the point on the real axis final DOES NOT belong to the root locus of the system is
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Q256
Open questionA plant transfer function is given as When the plant operates in a unity feedback configuration, the condition for the stability of the closed loop system is
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Q257
Open questionWhen all the roots of characteristic equation are found in the left half of s-plane, the system response due to initial condition will:
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Q258
Open questionThe polar diagram of conditionally stable system for open loop gain k = 1 is shown in the figure. The open loop transfer function of the system is known to be stable. The closed loop system is stable for
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Q259
Open questionThe open loop transfer function of a system is
The phase crossover frequency ωpc is:
The phase crossover frequency ωpc is:
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Q260
Open questionThe most commonly used input signal (s) in control system is/are
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