A signal-flow graph (SFG) is a graphical representation used in control system engineering and signal processing to illustrate the flow of signals through a system. It represents the relationships between variables in a system, allowing for an intuitive understanding of how inputs are transformed into outputs through various paths. Here are the key components and features of a signal-flow graph: 1. **Nodes**: Represent system variables (such as system inputs, outputs, and intermediate signals). Each node corresponds to a variable in the system.
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