Control System Applications set 6

Que.The time constant of a system is ________
a. equal to the damping constant
b. inverse of the damping constant
c. twice the damping constant
d. half of the damping constant
Que.If the natural frequency of a system increases, the rise time ________
a. Increases
b. Decreases
c. Doubles
d. Halves
Que.The settling time is a measure of _________
a. The speed of reaching stead state
b. The speed of reaching maximum overshoot
c. The speed of reaching second overshoot
d. Nothing
Que.If the poles of a system transfer function are equal and imaginary, the system is ________
a. Undamped
b. Critically damped
c. Overdamped
d. Negatively damped
Que.For negative damping, the system is unstable.
a. True
b. False
c. May be True or False
d. Can’t say
Que.An undamped system is stable.
a. True
b. False
c. May be True or False
d. Can’t say
Que.What is the impulse response of a system whose transfer function is that of ramp function delayed by 7 units in time?
a. r(t-7)
b. r(t+7)
c. r(t-3.5)
d. Cannot be determined
Que.What is the impulse response of the system whose transfer function is that of a pulse which generates from the following code?
plot(0:12,[zeros(1,4),ones(1,5),zeros(1,4)])

a. u(t-4)+u(t-9)
b. u(t+4)-u(t-9)
c. u(t-4)-u(t+9)
d. u(t-4)-u(t-9)
Que.The output of the following two code snippets are ___
i.  impulse(1,[ 6 3])
ii. impulse(1/6,[ 1 .5])

a. Same graphs
b. Different grpahs
c. Amplitude of graph i>ii
d. Amplitude of graph i
Que.Which response would provide a higher stability?
a. A step signal
b. A ramp signal
c. A sinusoidal
d. 1/(s-1)