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Control System
Block Diagram Reduction Techniques
Content
Review of Last Lecture.
Need of Block Diagram.
Block Diagram Reduction Technique.
Examples of Block Diagram Reduction.
Learning Objectives
Able to understand the need of Block
diagram in Control System.
Able to apply various rule of block
diagram reduction techniques.
Block Diagram Algebra
Block diagram is a shorthand, graphical
representation of a physical system,
illustrating the functional relationships
among its components.
OR
A Block Diagram is a shorthand pictorial
representation of the cause-and-effect
relationship of a system.
Block Diagram Algebra
Entire complicated system can be
completely represented by connecting
different blocks.
One block corresponds to one element of
system.
A corresponding block is drawn by inserting
a transfer function of that element inside the
block
.
Components of a Block Diagram
for a LTI System
System components are alternatively
called elements of the system.
Block diagram has four components:
Signals
System/ block
Summing junction
Pick-off/ Take-off point
