Q. A unity feedback system has G(s) = 10/s(s+1)(s+2). If input r(t) = 1 + 2t + 3/2t³, the steady error is

View solution

Q. Assertion (A): The root locus of a control system is symmetrical about real axis.

Reason (R): For all polynomials with real coefficients, complex poles always occur in conjugate pairs.

View solution

Q. In log magnitude Bode diagram the slope of high frequency asymptote of (1 + jωT) is

View solution

Q. Assertion (A): The time response, usually, is slower with lag compensation.

Reason (R): The natural undamped frequency and bandwidth are increased.

View solution

Q. For the factor 1/(1 + 2jω) the corner frequency is

View solution

Q. A lag compensator provides attenuation in

View solution

Q. A stepper motor is essentially

View solution

Q. In a synchro transmitter

View solution

Q. The polar plot of G(jω) = 1/jω is

View solution

Q. For an unstable system the gain margin is indicative of how much the gain should be decreased to make the system stable.

View solution

Q. For a stable system having two or more gain crossover frequencies the phase margin is measured

View solution

Q. In a second order system, peak overshoot is independent of

View solution

Q. Nyquist plot provides information about absolute stability as well as relative stability.

View solution

Q. Power handling capacity of wire wound potentiometer used in control systems is about

View solution

Q. For stable network the real parts of poles and zeros of driving point functions must be

View solution

Q. A compensating network has Gc(s) = (1+αTs)/(1+Ts) . If it is a phase lag circuit the value of a should be

View solution

Q. If Z is the number of zeros of 1 + G(s) H(s) in the right half s plane. N is the number of clockwise encircle elements of (-1 + jo) point. P is the number of poles of G(s) H(s) in right half s plane. The Nyquist stability criterion can be expressed as

View solution

Q. The number of stator field windings in an ac tachometer are

View solution

Q. The radius of constant N circle for N = 1 is

View solution

Q. In using Nyquist stability criterion it is not necessary to determine closed loop poles.

View solution