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problem 1:

a) Describe the temperature control system concepts by using open loop as well as closed loop system.

b) Human being is an illustration of closed loop system. Validate your answer.
 
problem 2:

a) What do you mean by the term feedback? Describe the effects of feedback?
 
b) What is the sensitivity function and describe it with respect to open loop and closed loop systems?
 
problem 3:

a) Define transfer function and stating an ex of differential equation find the transfer function of that differential equation.

b) Derive the relationship between transfer function, impulse response and unit step response.

problem 4:

a) Draw a signal flow graph and find out its closed loop transfer function. Verify it by using signal flow graph.

305_signal flow graph.jpg

b) Obtain the total transfer function C/R from the signal flow graph as shown in figure below:

576_overall transfer function.jpg

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