Block Diagram Summing Junction. The block diagram elements sys1sysn are dynamic system models. There are three components used in system block diagrams.
The loop in figure 17 contains two summing junctions which prevents the use of the loop reduction rule. Step 4c step 5. The block diagram reduction process takes more time for complicated systems.
The system input point and the system output point are also nodes.
The function of a block diagram is to simplify a very complex system to its most fundamental components. Pickoff point distributes the input signals r s undiminished to several output points. The summation of input signals is represented by a point called the summing point shown in the figure below by crossed circle. Block diagram reduction rules table 2.