Optimum Tuning of PI Controller Parameter Using Numerical Method

T. Geetha and S. Somasundaram

In this article, an easy PI tuning method of the first order time delay system is conferred. Initially a global stability region is achieved to find a optimal PI controller parameter among several stable PI parameters in the global stability region. Here successive approximation method is introduced in this article to find the stabilized value of the PI controller. Gregory – Newton Forward interpolation based PI Controller satisfies the conditions of a stable PI controller. It is emphasized that the optimal values computed using the proffered numerical method ensures closed loop response with minimal overshoot, rise time and shortest settling time. Besides stability, following requirements such as the disturbance rejection and Set point tracking is included in the control system design. The preferred method gives an efficient, reliable result and it is rationally useful for the designers in control and analysis of the time delay system. The simulation results of stable FOPTD process model of the preferred numerical method is then compared with some other numerical methods.

Volume 12 | 05-Special Issue

Pages: 215-222

DOI: 10.5373/JARDCS/V12SP5/20201751