Determine C/R for the system given in figure below. Then put G3 = G1 G2 H2. Now the new
transfer function will be:
Correct answer is option 'D'. Can you explain this answer?
to find the transfer function
Convert the above block diagram into signal flow graph for easier analysis
Find the forward paths p1 p2
Find loop L1
Del : 1-(€ loop gains ) ( product of individual loop gains)...
Transfer function :
C/R :(pk * delk)/del
Pk is forward loop gain
Delk is l-(gains of non touching loops to that forward path)
Finally substitute G3
To get final answer as