Why is the output in the middle of the block diagram?

[EastWindBreaks]

(mentor note: not really a homework as the OP seeks understanding from an article)

1. Homework Statement

I saw this on https://www.electronicshub.org/open-loop-system/, I thought the dry clothes should be the output, and heating the cloth should be the plant/process, I am so confused

Homework Equations

The Attempt at a Solution

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[jedishrfu]

There's a diagram at the start of your article that shows the controller as the central component si its has input and it has output. The output of the controller is the input to the process. They then implicitly map that to the diagram above so that the actual dryness is to process output.

I think its a bit confusing too as they talk about loops but none are shown in these diagrams.

 

[CWatters]

+1

The "controlled output" is the heating element. The dryness of the clothes isn't controlled because that would depend on other factors such as how wet they were when they were put in the machine.

If they added a humidity sensor and connected that to the controller then the dryness of the clothes would be a controlled output.