Question: 1) Simplify the above block diagram and determine the closed-loop transfer function. ( Hints : Join summing junction 2 and 3, then simplify the block

 1) Simplify the above block diagram and determine the closed-loop transfer

1) Simplify the above block diagram and determine the closed-loop transfer function. (Hints: Join summing junction 2 and 3, then simplify the block diagram using parallel, cascade and feedback connections)

2) If given transfer function

function. (Hints: Join summing junction 2 and 3, then simplify the block,

using Routh- Hurwitz criterion, find the range of K that will make this unit feedback system

critically stable.

H,(s) R(s)+

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