ELG 3155 Lecture Notes - Lecture 3: Loop Gain, Mimo, Royal Institute Of Technology
27 May 2015
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Document Summary
We need to simplify a complicated system with many interconnected subsystem for interconnected subsystem for. Simple parallel and series reductions cannot handle complicated inter-connection of subsystems. Components of a block diagram for a linear, time-invariant system. G(s)h(s) is called the loop gain of the open loop. Some terminologies in a feedback control system se shscsr se sc sg. G(s)h(s) is called the loop gain of the. Examples: skill-assessment exercise 5. 1, example 5. 2, inclass examples. Signal-flow graph components system signal interconnection of systems and signals. Definitions: branch: unidirectional segment, node: signal, path: a concatenation of non-intersecting segments (and nodes, loop: a path where segments intersect. Non-touching loop: no line segments are in common. Examples of building signal-flow graphs: cascaded system nodes, parallel system nodes, feedback system nodes. This is a draft of the signal flow graph: simplify the signal-flow graph. Very useful rule for path (block) reduction. Note: the forward path should not repeat nodes (i. e. no loops)
