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Unformatted text preview: Block Diagram Reduction Signal-Flow Graphs Unit 4: Block Diagram Reduction Engineering 5821: Control Systems I Faculty of Engineering & Applied Science Memorial University of Newfoundland February 27, 2009 ENGI 5821 Unit 4: Block Diagram Reduction Block Diagram Reduction Signal-Flow Graphs 1 Block Diagram Reduction Cascade Form Parallel Form Feedback Form Moving Blocks Example 1 Signal-Flow Graphs ENGI 5821 Unit 4: Block Diagram Reduction Block Diagram Reduction Signal-Flow Graphs Cascade Form Parallel Form Feedback Form Moving Blocks Example Block Diagram Reduction Subsystems are represented in block diagrams as blocks, each representing a transfer function. In this unit we will consider how to combine the blocks corresponding to individual subsystems so that we can represent a whole system as a single block, and therefore a single transfer function. Here is an example of this reduction: Reduced Form: ENGI 5821 Unit 4: Block Diagram Reduction First we summarize the elements of block diagrams: We now consider the forms in which blocks are typically connected and how these forms can be reduced to single blocks. Block Diagram Reduction...
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- Spring '09