Signal Flow Graph from Block Diagram
In the field of electronics engineering, block diagrams are used to simplify intricate circuits. The block diagram shows numerous electronic components as well as input and output. As a result, we must carefully comprehend this before drawing the Signal Flow Graph. Prior to that, we must comprehend the jargon.
- R(s) is the input point, C(s) is the output point.
- The circle with a cross is called summing point(S), and the branches meet at the dot point is called take-off point.
- The “G” inside a box called the gain, there can be many gain blocks in a single block diagram.
- Since electronics components also provide feedback, “H” inside the box is referred to as the feedback.
In the image below we can see the block diagram to Signal Flow Graph:
Block Diagram to Signal Flow Graph
R(s) and C(s) is the input and output respectively.
As you can see that in the block diagram there are two summing point so we have mentioned them with S1,S2 in the Signal Flow Graph, and with t1,t2,t3 we mentioned the take-off points.
As, G1 and G2 are in a loop, so we do the same for the Signal Flow Graph also. And feedbacks are in negative so we mentioned it with -H1 and -H2.
So, this is how we made the Signal Flow Graph from Block diagram.
Basic Elements of Signal Flow Graph
Signal Flow Graphs are a crucial component of control systems. Furthermore, the control system is one of the most significant subjects in Electronics. It is primarily covered in the sixth semester of the B.Tech syllabus, though individual universities may alter it based on their syllabus hierarchy. To understand Signal Flow Graph let’s understand the Control System first, then we will dive into the main topic. When we put some inputs into a particular electronic device, it computes the signal or data and results in an output, this is what a Control System does.
A similar process is used with the Signal Flow Graph. Engineers can quickly compute and comprehend how the system operates by inserting the signal at one end and adding electronic devices in between to compute data using algebraic equations.
Table of Content
- What is a Signal Flow Graph?
- Basic Elements of Signal Flow Graph
- How to build Signal Flow Graph?
- Mason Gain Formula with Example
- Signal Flow Graph from Block Diagram
- Applications of SFG
- Advantages and Disadvantages of SFG
Contact Us