Control System Modeling

For the block diagram given in the following figure, the expression of C/R is:

• G1G2G3/1-G2G1
• G1G2/1-G1G2G3
• G1G2G3/1-G1G2G3
• G1G2/G3(1-G1G2)

The closed loop gain of the system shown in the given figure is

• -9/5
• -6/5
• 6/5
• 9/5

The overall transfer function of two blocks in parallel are

• Sum of individual gain
• Product of individual gain
• Difference of individual gain
• Division of individual gain

The total number of loops available in the given signal flow graph is

• 10
• 9
• 11
• 8

Signal flow graphs are reliable to find transfer function than block diagram reduction technique

• True
• False

Number of non touching loops taken two at a time

• 4
• 1
• 3
• 2

What is Control System?

• Control system is a system in which the output is controlled by varying the input
• Control system is a device that will not manage or regulate the behaviour of other devices using control loops
• Control system is a feedback system that can be both positive and negative
• Control System is a system in which the input is controlled by varying the output

What is a traffic light system?

• Closed loop system
• Open loop system
• Both a and b
• None

Select the correct definition of Loop gain among the following.

• Product of every branch gains while traversing the forward path
• Product of every in the loop
• Sum of every branch gains
• Sum of every branch gains while traversing the forward path

An originally stable system can become unstable or more stable due to feedback

• true
• False