Control System Applications set 4

Que.The steady state value of a system is _____ it’s a transient response.
a. dependent on
b. independent of
c. greater than
d. not observable from
Discussion
Que.Delay time is the time required by a system to reach a quarter of its steady state value.
a. True
b. False
c. May be True or False
d. Can’t say
Discussion
Que.For non-unity feedback system, the error is calculated with respect to the reference signal.
a. True
b. False
c. May be True or False
d. Can’t say
Discussion
Que.What is the output of the following code?
>>p=[0 1];
>> q=[ 1 -1 0];
>> step(p,q)

a. An unstable response
b. A stable response
c. A marginally stable response
d. A marginally unstable response
Discussion
Que.Which of the following command will reveal the damping ratio of the system?
a. damp()
b. damp[]
c. damping{}
d. dr()
Discussion
Que.What is the output of the following code?
>>p=[ 1 0 1];
>> q=[  -1 1];
>> step(p,q);

a. An unstable step response
b. A stable step response
c. Error
d. A marginally unstable response
Discussion
Que.What is the output of the following code?
tf({1},{1 1})

a. Error
b. 1/s+1
c. s+1/1
d. 1/s
Discussion
Que.If the damping factor is zero, the unit-step response is
a. Purely sinusoidal
b. Ramp function
c. Pulse function
d. Impulse function
Discussion
Que.What is the output of the following code?
impulse([1],[1 1])

a. e-t*u(t)
b. e-t*u(-t)
c. e-t*u(t)
d. e+t*u(t)
Discussion
Que.If the damping ratio is equal to 1, a second-order system is _________
a. having maginary roots of the characteristic equation
b. underdamped
c. critically damped with unequal roots
d. critically damped with equal roots
Discussion

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