| Popis: |
There are lot of controllers in process control such as on-off, PI, PD and PID controllers. But commonly used controllers in industrial control applications are proportional-integral (PI) and proportional-integral-derivative (PID) controllers. A PI controller is used when fast response of the system is not required. PID controller has the advantage of high stability and reliability. The PID controller is having the accurate and efficient tuning of parameters. Generally, most industrial processes are multivariable systems. It is difficult to tune the gains of PI and PID controllers because many industrial plants are often burdened with problems like high order, time delays, poor damping, nonlinearities, and time-varying dynamics etc. That means, the proper design of multi-loop PID control for multivariable process is a challenging task. In this paper, PI and PID controllers are designed for multi-input multi-output system. To validate the performance of PI and PID control design, binary Wood-Berry distillation column which is a multivariable, non linear process with strong interactions with input and output pairs is taken and compared their performances. |
