Signal-flow graph: Difference between revisions

Revision as of 22:44, 4 September 2019

Revision as of 21:01, 7 September 2019

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For some authors, a linear signal-flow graph is more constrained than a [[block diagram]],<ref name="Kuo, 6th ed, p77">

"A signal flow graph may be regarded as a simplified version of a block diagram. ... for cause and effect ... of linear systems ...we may regard the signal-flow graphs to be constrained by more rigid mathematical rules, whereas the usage of the block-diagram notation is less stringent." {{cite book| |last= Kuo |first= Benjamin C. | year= 1991 |title= Automatic Control Systems |edition= 6th |publisher= Prentice-Hall |isbn= 978-0-13-051046-4 | p= 77 |url-access= registration |url= https://archive.org/details/automaticcontrol00kuob_0 }}</ref> in that the SFG rigorously describes linear algebraic equations represented by a directed graph.

For other authors, linear block diagrams and linear signal-flow graphs are equivalent ways of depicting a system, and either can be used to solve the gain.<ref name=Franklin>