Font size
WorksheetsControl systems
Total questions: 25
Worksheet time: 15mins
In a control system, input devices called (a) feed data into the computer.
A system that relies on feedback in order to operate is known as what?
A closed-loop system
A constant-loop system
An open-ended system
An open-loop system
The advantage of block diagram representation is that it is possible to evaluate the contribution of each component to the overall performance of the system.
a) True
b) False
6. The overall transfer function from block diagram reduction for cascaded blocks is :
a) Sum of individual gain
b) Product of individual gain
c) Difference of individual gain
d) Division of individual gain
The overall transfer function of two blocks in parallel are :
a) Sum of individual gain
b) Product of individual gain
c) Difference of individual gain
d) Division of individual gain
Transfer function of the system is defined as the ratio of Laplace output to Laplace input considering initial conditions________
a) 1
b) 2
c) 0
d) infinite
WHAT IS THE ANOTHER NAME FOR TAKE OFF POINT
RESISTOR
BRANCH POINT
SUMMING POINT
DOT POINT
For the block diagram given in the following figure, the expression of C/R is:
a) G1G2G3/1-G2G1
b) G1G2/1-G1G2G3
c) G1G2G3/1-G1G2G3
d) G1G2/G3(1-G1G2)
The transfer function from D(s) to Y(s) is :
a) 2/3s+7
b) 2/3s+1
c) 6/3s+7
d) 2/3s+6
The closed loop gain of the system shown in the given figure is :
a) -9/5
b) -6/5
c) 6/5
d) 9/5
IDENTIFY THE COMPONENTS OF BLOCK DIAGRAM
BLOCK
SIGNAL
SUMMING POINT
BLOCK,SIGNAL,SUMMING POINT,TAKE OFF POINT
At summing point, more than one signal can be added or _________
Subtracted
Multiplied
Both a and b
none of the above
For the elimination of feedback loops, the derivation based on transfer function of ______ loop is used.
Open
closed
Both a and b
None of the above
While shifting a take-off point after the summing point, which among the following should be added?
Summing point in series with take-off point
Summing point in parallel with take-off point
Block of reciprocal transfer function
Block of inverse transfer function
The output signal is fed back at the input side from the _________point
Summing
Differential
Take-off
All of the above
A node having only outgoing branches
Input Node
Output node
Incoming node
Outgoing node
Loop which do not possess any common node are said to be ___________ loops.
Forward gain
Touching loops
Non touching loops
Feedback gain
Signal flow graphs is
They apply to linear systems
The equation obtained may or may not be in the form of cause or effect
Arrows are not important in the graph
They cannot be converted back to block diagram
The relationship between an input and output variable of a signal flow graph is given by the net gain between the input and output node is known as the overall______________.
Overall gain of the gain
Stability
Bandwidth
Speed
Use mason’s gain formula to calculate the transfer function of given figure:
G1/1+G2H
G1+G2/1+ G1H
G2/1+G1H
None of the mentioned
Use mason’s gain formula to find the transfer function of the given figure:
G1+G2
G1+G1/1-G1H+G2H
G1+G1/1+G1H+G2H
G1-G2
For which systems are the signal flow graphs applicable?
Causal
Invertible
Linear time invariant system
Dynamic
In a signal flow graph, nodes are represented by small _____.
Circles
Squares
Arrows
Pointer
