PID tuning for improved performance

In this paper, a simple PID controller design method that achieves high per formance for a wide range of linear self-regulating processes is proposed. Satisfactory responses can be expected for processes with various dynamics, including those with low- and high-order, small and large dead time, and m onotonic and oscillatory responses. The method is developed based on a seco nd-order plus dead time modeling technique and a closed-loop pole allocatio n strategy through the use of root-locus. Simulation examples and real-time experiments are given to show the effectiveness and flexibility of the con troller in handling processes of different characteristics.