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Worksheetscontrol system
Total questions: 20
Worksheet time: 10mins
Which among the following represents an illustration of closed loop system?
Automatic washing machine
Bread toaster
Automatic electric iron box
Electric hair drier
Which terminology deals with the stimulus applied to a system from an external source?
Input signal
Output signal
Error signal
Feedback signal
Which among the following illustrate an example of open loop system?
Water level controller
Servo voltage stabilizer
Automatic tea maker
Automatic electric iron
Which of these is not a control system output device?
Projector
LED
Buzzer
Actuator
If poles of system are lying on the imaginary axis in s-plane, the system will be
Unstable
Marginally stable
Conditionally stable
Unstable
Which system conveniently see the impact of poles and zeros on phase and gain margin?
Root locus
Nyquist plot
Routh-Hurwitz criterion
Bode plot
For relative stability of the system which of the following is sufficient?
Gain margin
Phase margin
Both (a) and (b)
None of these
Cut off is the slope of log-magnitude curve
At the start of curve
At the end of curve
None of these
Near the cut off frequency
According to the property of state transition method, e0 is equal to _____
I
A
e-At
-eAt
What is used directly to modify the behaviour of a system?
Input
Output
Feedback
Processing
The mechanism of control of body temperature is Non Feedback system.
True
False
A car is moving at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?
Clutch
Eyes
Needle of speedometer
Steering wheel
Transfer function of a system is used to calculate which of the following ?
The order of the system
The time constant
The output for any given input
The steady state gain
Spring constant in force-voltage analogy is analogous to
Capacitance
Current
Resistance
Reciprocal of capacitance
To model a rotational mechanical system the three basic elements required are denoted by
M, B, K
J, B, K
G, K, J
M, B, J
Transfer function of a system is defined as the ratio of output to input in
Z-transformer
Fourier transform
Laplace transform
All of these
How is an output represented in the control systems?
r(t)
x(t)
c(t)
y(t)
