CONTROL SYSTEMS QUIZ

Which of the following represents the value of resonant frequency (ωr)?

2*(ωn) √(1-ζ²)

(ωn) √(1-ζ²/2)

(ωn) √(1-ζ²)

(ωn) √(1-2ζ²)

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider a point S = -3 + j4 in the s-plane. Then for a system with the open loop transfer function ?

S is on root locus

None of these

S is not on root locus

either 1 or 2

TRUE ANSWER : ?
YOUR ANSWER : ?

Two identical first order systems have been cascaded non interactively. The unit step response of the systems will be

critical damped

un damped

Over damped

under damped

TRUE ANSWER : ?
YOUR ANSWER : ?

Based on relation between the arm impedances the filters can be categorized into how many types?

3.

2.

Not classified at all.

4.

TRUE ANSWER : ?
YOUR ANSWER : ?

Lowest critical frequency is due to pole and it may be present at the origin or nearer to the origin, then the type of network is

Any of the above.

RC.

RL.

LC.

TRUE ANSWER : ?
YOUR ANSWER : ?

A proportional plus derivative controller

both 1 and 2

has high sensitivity

increases the stability of the system

improves the steady state accuracy

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider the following statements for phase lead compensation:

The maximum phase lag occurs at the arithmetic mean of the two corner frequencies.

both 1 and 2

Phase lead compensation shifts the gain crossover frequency to the right

nether 1 nor 2

TRUE ANSWER : ?
YOUR ANSWER : ?

Find the Laplace transform for sinωt?

1/s²

ω/(s²+ω²)

1/s

s/(s²+ω²)

TRUE ANSWER : ?
YOUR ANSWER : ?

A linear time invariant system has an impulse response e2t for t > 0 . If initial condition are 0 and input is e3t, the output for t > 0 is

e3t - e2t.

e2t - e3t.

e5t.

e2t + e3t.

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider the function F(s) = ω/(s²+ω²). Where F(s) = Laplace transform of f(t). The final value of f(t) is equal to

finite constant

zero

a value between -1 and +1

infinite

TRUE ANSWER : ?
YOUR ANSWER : ?

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