In control system terminology, which signal is used to drive the system to produce an output?

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In control system terminology, which signal is used to drive the system to produce an output?

In a control system, the thing that actually pushes the plant to respond and produce an output is the input signal—the command or reference fed into the system. The input sets what the system should do, and the system’s output is its response to that input. The error signal is the difference between what you want (the reference) and what’s actually happening (the output), and it’s used by the controller to adjust the input. The feedback signal is the measured output fed back into the loop to help form that error, but it isn’t the signal that directly drives the plant. So the input signal is the driving signal that determines the system’s output.

In a control system, the thing that actually pushes the plant to respond and produce an output is the input signal—the command or reference fed into the system. The input sets what the system should do, and the system’s output is its response to that input. The error signal is the difference between what you want (the reference) and what’s actually happening (the output), and it’s used by the controller to adjust the input. The feedback signal is the measured output fed back into the loop to help form that error, but it isn’t the signal that directly drives the plant. So the input signal is the driving signal that determines the system’s output.

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