Characterising a system from its input and output

1. How do you characterize a system?
2. What are the examples of an input and output in a control system?
3. Which signal is used to find the response of unknown system?

How do you characterize a system?

A system is characterized by how it responds to input signals. In general, a system has one or more input signals and one or more output signals. Therefore, one natural characterization of systems is by how many inputs and outputs they have: SISO (Single Input, Single Output)

What are the examples of an input and output in a control system?

We discuss different examples to identify the input and output of a control system. One example scenario is about an oven toaster. The setting of the timer was identified as the input. The output is the actual toasted bread.

Which signal is used to find the response of unknown system?

We can use the impulse signal to find the frequency characteristics of the unknown system used in Example 5.1.