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Performance Analysis of a Non Linear Process Using Different PID Control Techniques

K. Sujitha, R. Kalaiyarasi, J. Nancy Amala Geetha, P. Aravind

Industries are the huge developing areas in which all the complex systems are involved. They involve controlling and tuning of the controllers of processes with streams like gases, liquids, powders, slurries etc.[2] They exhibit variations due to the changes in the operating level. This, in fact is the very nature of a non linear process. So, for this reason, researcher prefers controller design and tuning by specifying their design level of operation. This performance changes may be tolerable in some applications and unacceptable in others. In this paper, non linear process of a spherical tank is controlled and tuned using certain methods such as damped oscillation method, modified ZN method,[1] TL, ZNCL methods[2][6]. Here the controllers are designed stimulated using mat lab simulink. The best among PID controller settings is identified by time domain analysis.