A General Flow Graph Technique for the Solution of Multiloop Sampled Systems

[+] Author and Article Information
R. Ash, W. H. Kim, G. M. Kranc

Department of Electrical Engineering, Columbia University, New York, N. Y.

J. Basic Eng 82(2), 360-366 (Jun 01, 1960) (7 pages) doi:10.1115/1.3662599 History: Received August 10, 1959; Online November 04, 2011


This paper presents a flow graph approach for analyzing multiloop sampled-data systems. Two techniques for finding the sampled output are examined. These are, first, construction of a “sampled” signal flow graph from the original system; second, a general gain formula which can be directly applied to the original system. The theorems necessary to establish the formula are rigorously proved. The first technique allows two possible modes of solution. The sampled output can be found directly from the sampled flow graph by the use of Mason’s formula, or in case of a more complicated multiloop system, the problem of enumerating nontouching feedback loops can be simplified by the use of topological matrices. Techniques developed in the paper are also applied to the solution of multirate systems.

Copyright © 1960 by ASME
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