CONTROL SYSTEMS QUIZ

In which of the following controller band width is increased?

nether 1 nor 2

proportional plus integral controller

proportional plus derivative controller

both 1 and 2

TRUE ANSWER : ?
YOUR ANSWER : ?

The characteristic equation of a feedback control system is given by s³ + 5s² + (k + 6)s + k = 0. In the root loci diagram, the asymptotes of the root loci for large 'k' meet at a point in the s-plane whose coordinates are

(2,0)

(1,0)

(-2,0)

(-1,0)

TRUE ANSWER : ?
YOUR ANSWER : ?

The transfer function for tachometer E(S)/θ(S) is

KS2

K/S

KS

K

TRUE ANSWER : ?
YOUR ANSWER : ?

An open loop control system, represented by the transfer function G ( s ) = ( s - 1 ) / ( s + 2 )( s + 3 ), is

unstable and of the minimum phase type.

unstable and of the non minimum phase type .

stable and of the non-minimum phase type.

stable and of the minimum phase type.

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider a network function H(s) = 2(s+3)/{(s+2)(s+4)}. What is the steady state response due to step input?

1/2

4/3

1

3/4

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YOUR ANSWER : ?

A second order control system has a transfer function 16/(s² + 4s + 16). What is the time for the first overshoot?

π/4√3 sec

π/2√3 sec

π/√3 sec

2π/√3 sec

TRUE ANSWER : ?
YOUR ANSWER : ?

When the input to a system was with drawn at t = 0, its output was found to decrease exponentially from 1000 units to 500 units in 1.386 sec. The time constant of the system is

0.500.

1.386.

0.693.

2.000.

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is/are represents the lead compensator?

(s+2)/(s+1)

(s+5)/(s+6)

(s+2)/(s+5)

both 2 and 3

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YOUR ANSWER : ?

The unit impulse response of second order system is 1/6 * e-0.8t sin(0.6t). THen the natural frequency is

0.6 rad/s

0.8 rad/s

2 rad/s

1 rad/s

TRUE ANSWER : ?
YOUR ANSWER : ?

A proportional plus derivative controller

improves the steady state accuracy

has high sensitivity

increases the stability of the system

both 1 and 2

TRUE ANSWER : ?
YOUR ANSWER : ?

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