Introduction to Block Diagram Reduction Techniques Block Diagram Reduction rules Feed Back Control System Examples

1. DR.P.POONGODI
Professor/Dept. of ECE
KIT-Kalaignarkarunanidhi Institute of Technology
INTRODUCTION TO
BLOCK DIAGRAM REDUCTION TECHNIQUES

2. • System can be represented by block diagrams
• Block diagram is a graphical representation of a physical system
• A group of properly interconnected blocks, with each interconnected
block representing and describing a function of the system
• Illustrating the functional relationships among its components in a system
• Components in a system:
 Signals
 Blocks
 Summer
 Pick-off

3. • The arrows represent the direction of information or signal flow.
Illustration
•The output is the algebraic sum of the inputs.
•Any number of inputs may enter a summing point.

4. Block Diagram Reduction Rules

5. A Feedback Control System

6. Reduction
Techniques
Cascade connections

7. Parallel connections

9. Example - 1

12. Example - 2

13. Example – 2 (Cont.…)

14. Example – 2 (Cont.…)

15. Example – 3