Block Diagram Reduction

1. Block Diagram Reduction SUBMITTED BY: Mrs. SANDEEP KAUR ASST. PROFESSOR-EEE

2. Block Diagram reduction • We often represent control systems using block diagrams. A block diagram consists of blocks that represent transfer functions of the different variables of interest. • If a block diagram has many blocks, not all of which are in cascade, then it is useful to have rules for rearranging the diagram such that you end up with only one block.

3. For example, we would want to transform the following diagram

4. Block Diagram Transformations • Combining blocks in cascade(series)

5. 2 (Blocks in Parallel)

6. 3. Moving a summingpoint behind a block

7. 4. Moving a pickoff point ahead of a block

8. 5. Moving a pickoffpoint behind a block

9. 6. Moving a summingpoint ahead of a block

10. 7. Eliminating afeedback loop

11. 8. replacing summing points

12. 9. Combining summing points

13. AttentionDon't use this

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23. Example

25. Example

26. Example