Question: A proportional-only feedback controller is implemented as shown in figure. We ordinarily think of the process and controller gains as being positive.(a) Give an example

A proportional-only feedback controller is implemented as shown in figure. We ordinarily think of the process and controller gains as being positive.(a) Give an example of a process whose gain (between the manipulated and controlled variables) is negative. Draw a schematic diagram of the process to make your description easier.(b) If the process gain is negative, what should be the sign of the controller gain?(c) Is the controller for part (b) reverse or directacting?

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