Modified dynamic set point weighted controller for various sampling period

The property of traditional Ziegler–Nichols tuned PI controllers (ZNPIs) are simple tuning rules with excessive oscillation and large overshoot. However, both the fixed set point weighted PI ( FSWPI) and ZNPI exhibit equally poor load regulation. Dynamic set point weighted PI controller (DSPWPI) shows better response than FSPWPI and ZNPI but only for very low sampling period. Here, an online modified dynamic set-point weighting technique (MDSPWPI) is proposed. Performance of the proposed modified dynamic set-point weighting based PI controller (MDSPWPI) for various processes shows a significant improvement and stable response for set point change at allowable sampling period range.