Arman  Sharifi, Hooman  Sadjadian, 
    A New Optimal Method to Tune PI Controllers using Evolutionary Polynomial Regression,
    International Journal of System Signal Control and Engineering Application,
    Volume 10,Issue 2,
    2017,
    Pages 93-100,
    ISSN 1997-5422,
    ijssceapp.2017.93.100,
    (https://makhillpublications.co/view-article.php?doi=ijssceapp.2017.93.100)
    Abstract: A new optimal method is proposed to tune PI
controllers for the First Order Plus Dead Time (FOPDT)
models. In this approach, a performance index is
employed with specification of the infinity-norm of the
sensitivity and complementary sensitivity functions. This
criterion determines desire values of PI controller
parameters for a bank of FOPDT models. Then an
Evolutionary polynomial regression is applied to extract
a tuning rule for PI controllers. At the end, the
performance of recommended method is evaluated by
several case study simulations.
    Keywords: Tuning methods;PI controller;frequencydomain criterion;evolutionary polynomial regression;FOPDT