Proposal of Conservative Controller And model identification of Temperature Process

Nowadays, process and chemical industries are sophisticated by employing closed loop feedback controllers. The predominantly used closed loop controller in industries is PID (Proportional-Integral-Derivative) controller. It has many advantages over the P and PI controller. It has faster response, takes into an account any changes in the process variable and also reduces the steady state error value. Hence the system tries to reach its set point quickly. Here the tuning of PID controller is done by various tuning methods. The major purpose of this paper is, to find out which tuning technique will yield the lowest overshoot percentage and shortest settling time for all situations for the given temperature process. It will give an engineer a good starting point to further adjust the parameters to achieve the desired design criteria. Ziegler-Nichols (Z-N) method is generally used for tuning PID controller. But it has some demerits compared with other tuning methods which yield an overshoot and long settling time. When we use C-C method (Cohen-Con) for tuning of the controller, it reduces the overshoot and settling time. Likewise we are tuning the PID controller with various tuning techniques (Ziegler-Nichols method, Tyreus-Luyben method, Cohen and con method, and Chien-Hrones-Reswick method) for examine the response of each method and finalised the best controller based on its result.