Chemical Engineering - Process Control and Instrumentation - Discussion
Discussion Forum : Process Control and Instrumentation - Section 3 (Q.No. 8)
8.
Transfer functions X/Y for which of the following block diagrams is 
none of these
Discussion:
4 comments Page 1 of 1.
Bani said:
1 decade ago
I think its 3rd option because in numerator there should be straight chain, in that G1 is given but not G3 so. If its a G3 in the numerator then the answer is 1st option only.
Diwaker Pandey said:
1 decade ago
Answer is Option A.
X=[(Y.G1-X).G2+Y].G3.
=>X/Y = G1.G2.G3+G3/1+G2.G3.
But numerator of option A has G1 as sum but solution comes as G3 as sum.
X=[(Y.G1-X).G2+Y].G3.
=>X/Y = G1.G2.G3+G3/1+G2.G3.
But numerator of option A has G1 as sum but solution comes as G3 as sum.
Mohd Tauhid khan said:
6 years ago
(G1G2Y - XG2 +Y) = X.
X/Y = G3 +(G1G2G3 )/(1+G1G2).
X/Y = G3 +(G1G2G3 )/(1+G1G2).
Lucifer said:
5 years ago
X/Y = (G3+G1G2G3)/(1+G2G3).
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