A MATLAB Approach to study different types of Ziegler-Nichols P-I-D Controller Tuning Algorithm

A MATLAB Approach to study different types of Ziegler-Nichols P-I-D Controller Tuning Algorithm

Today, a number of different controllers are used in industry and in many other fields. In quite general way those controllers can be divided into two main groups:
• Conventional controllers
• Unconventional controllers
As conventional controllers we can count a controllers known for years now, such as ON-OFF, P, PI, PD, PID all their different types and realization. It is a characteristic of all conventional controllers that one has to know a mathematical model of the process in order to design a controller.
A Proportional–Integral–Derivative (PID) controller is a three-term controller that has a long history in the automatic control field, starting from the beginning of the last century. Owing to its intuitiveness and its relative simplicity, in addition to satisfactory performance which it is able to provide with a wide range of processes, it has become in practice the standard controller in industrial settings.