This document provides steps for finding the transfer function from a signal flow graph. It outlines the key steps as:
1) Find the forward paths (F1, F2, etc.), single loops (L1, L2, etc.), and two non-touching loops (L1', L2', etc.).
2) Calculate the ¦¤ term which accounts for interactions between loops.
3) Calculate the ¦¤i terms based on which single loops do not touch a given forward path.
4) The transfer function is calculated as the sum of the forward paths multiplied by their respective ¦¤i terms, divided by the overall ¦¤ term.
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2. Steps to find transfer function from Signal flow graph
? Find Forward paths. (E.g. ??, ??, ¡ ¡ , ??)
? Find Single Loops. (E.g. ??, ??, ¡ ¡ , ??)
? Find Two Non-Touching Loops (E.g. ??
¡ä
= ?? ¡Á ??)
? Find ?
?= ? ? ? ?????? ????? + ? ??? ??? ???????? ????? ? ¡ ¡ ¡ ¡
? Find ??, ??, ¡ ¡ , ?? based on forward path
??= ? ? ? ?????? ????? ??? ???????? ???? ??
??= ? ? ? ?????? ????? ??? ???????? ???? ??
? Transfer Function
?(?)
?(?)
=
???? + ???? + ¡ ¡ + ????
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