How is a controller designed?
Control design, or the design of controllers, refers to techniques for controlling the modes of a system using any controllable device in the system, such as a generating unit or a FACTS device.
What is a linear controller?
A PI or Proportional-Integral controller is a linear controller which fuses the properties of both P and I controller and the algorithm provides a balance of complexity and capability in order to be widely used in industrial applications pertaining to process control.
Why do we design controllers?
Robust Multivariable Control
Therefore, it is important to design controllers that will maintain closed-loop stability in spite of erroneous design models and uncertainties in parameter values. Controllers so designed are said to impart stability robustness to the closed-loop system.