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Machines are made to replace humans in most control systems today.
The basic feature of any control system consists of 4 elements. These are measuring element, controlling element, set value, and correcting element.
The measuring element provides a means of detection/measurement of conditions required. This is "eyes" or "ears" (or other senses) of system.
The controlling element is place where all decisions on what actions to take are being made. It can be considered "brains" of system. It must make decisions based on certain guidelines or values required. The set values are inputted into system by humans.
The correcting element is where correction to process is done. It can be considered like "hands" or "feet" of system. It must take certain physical actions to bring processes back to set value.
Well folks, be in control!
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