68851. The constant M loci on G(s) plane are a family of circles.
68852. Assertion (A): Feedback control systems offer more accurate control than open loop systems.Reason (R): The feedback path establishes a link for comparison of input and output and subsequent error correction.
68853. Examine the following statements Pneumatic systems are fire proof.Pneumatic systems are explosion proof.Hydraulic systems are explosion proof.Hydraulic systems are fire proof. Which of the above statements are correct?
68854. For the given figure the equation of motion is
68855. The addition of a zero to the open loop transfer function
68856. Assertion (A): For a given system only one of the static error constants is finite and significant.Reason (R): If finite static error constant is large, the loop gain becomes smaller as ω approaches zero.
68857. If a zero is added to a second order underdamped system
68858. PID controlled system has
68859. In case of synchro error detector the electrical zero position of control transformer is obtained when angular displacement between rotors is
68860. For Bode plot of (1 + jωT) has
68861. For low frequencies such that , the log magnitude of factor is 0 dB.
68862. Assertion (A): The closeness of G(jω) locus to (- 1 + j0) point can be used as a measured of margin of stability.Reason (R): When the G(jω) locus comes close to encircling (- 1 + j0) point the system becomes oscillatory.
68863. For the system of the given figure |G(jω)| = 0 dB at ω =
68864. The capacitance of a gas pressure vessel is defined as
68865. The slope of log magnitude curve changes by - 40 dB/decade at a certain frequency and the error between asymptote and actual curve is positive. This means that
68866. A system has high gain and phase margin. The system is
68867. For the transfer function , the polar plot a is
68868. A proportional controller is basically
68869. A network has . Then
68870. The given figure shows log magnitude versus ω plots of a system for different values of gain. For this system
68871. The purpose of series quadrature windings in amplidyne is to
68872. For the transport lag G(jω) = e-jωT, the phase angle
68873. In classical analogue, torque is analogous to
68874. The pole zero plot of the given figure is for
68875. For the function G(s) = the poles are at
68876. Which dc servomotor has minimum inertia?
68877. Gas flow resistance is defined as
68878. Examine the following statements A small size hydraulic actuator can develop good torque.It is easy to maintain a hydraulic system leak proof.Both linear and rotatary hydraulic actuators are available.Hydraulic power is more easily available than electric power. Which of the above statements are correct?
68879. The given figure shows a constant current source driving a parallel RC circuit. It is equivalent to
68880. Consider the following statements regarding negative feedback It increases system gainIt improves sensitivityIt improves system stability Which of these are not correct?
68881. Which of the following are applications of position control systems?
68882. The system in the given figure has
68883. Assertion (A): Increasing the system gain improves steady state behaviour but may result in instability.Reason (R): A compensator is inserted into a system to ensure specified performance.
68884. Assertion (A): Inverse Laplace transform can be found from P(s) by inversion integral.Reason (R): The function f(t) is assumed to be zero for t < 0.
68885. For a second order system delay time td is the time required to reach
68886. Coulomb friction is
68887. A feedback amplifier has forward gains A1, A2 and feedback factor β as shown in signal flow graph of the given figure. Because of feedback as shown in signal noise ratio at output will
68888. For the system in the given figure . Then steady state error is
68889. The damping ratio of a pair of complex poles when expressed in terms of angle θ measured from jω axis equal to
68890. Assertion (A): Derivative control action is also called rate control and has an anticipatory character.Reason (R): Derivative control amplifies noise signals.
68891. Assertion (A): When a PID controller is added to a system, the peak overshoot to step input cannot be determined easily.Reason (R): Use of PID controller introduces a zero in the forward path.
68892. For the system shown in the given figure the time response to unit step input is
68893. The slope of log magnitude asymptote changes by - 40 dB/ decade at a certain frequency and the error between asymptote and actual curve is - 6 dB. This means that
68894. Friction forces acts in a direction
68895. Assertion (A): Integral control action is sometimes called reset control.Reason (R): Reset rate is expressed as number of repeats per unit time.
68896. In some on-off controllers a differential gap is provided
68897. If there are
68898. In Bode analysis the correction at corner frequency is 3 dB.
68899. The transfer function G(s) of a PID controller is
68900. In a proportional plus integral control action
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