Test: Automatic Control Systems - 2 - Electrical Engineering (EE) MCQ

If the poles lie in second quadrant, damping ratio is

Assertion (A): When performance specifications are given in term of transient response characteristics, root locus method is a suitable method.

Reason (R): When performance specifications in terms of state variables are given, modern control methods can be used.

Integral control action

If , the closed loop pole will be located at s = -12 when K =

The sensor generally used in incremental optical encoder is

Robotic manipulator arms mostly use

In terms of ξ and ω_n the settling time of a second order systems for 2% criterion and step input is equal to

For type 1 system the velocity lag error is

For as ω approaches infinity, the magnitude approaches zero and phase angle approaches - 90�.

In the given figure, the combinations of two non touching loops is

Nyquist stability criterion uses open loop frequency response characteristics.

For any test point s on the real axis, the sum of angular contributions of the complex conjugate poles is

For the system in the given figure G varies slightly, the ratio of open loop sensitivity to closed loop sensitivity is

The loop transfer function of a feedback system is . The number of asymptotes of its root loci are

The M circle for M = 1 is the

Which of the following can act as error detecting devices

1. a pair of potentiometers
2. a pair of synchros
3. a differential transformer
4. a metadyne
5. a control transformer

Assertion (A): If minimum phase system has a gain margin of 8 dB and phase margin of 21º, the system is stable.

Reason (R): For a minimum phase system both GM and PM must be positive for the system to be stable.

For 0 < M < 1, the centres of M circle lie to the right of origin.

Assertion (A): Integration in time domain is converted into division in s domain

Reason (R):

Assertion (A): In root locus the breakaway and break in points either lie on real axis or occur in complex conjugate pairs.

Reason (R): All root locus asymptotes intersect on real axis.

A conditionally stable system is stable for the value of gain between two critical values. It is unstable if

Transport lag usually exists in