Question: Consider the three-tank mixing process with a proportional-only controller in Example. Recalculate the root locus for the case with the three tank volumes reduced from 35 to 17.5 m3. Determine the controller gain for a proportional-only algorithm at which the system is at the stability limit. Compare your result with Example and discuss.
Example: The stability of the three-tank mixing process is to be evaluated under feedback control with a proportional-only controller.