Open AccessA Tuning Algorithm for LQ-PID Controllers using the Combined Time - and Frequency-Domain Control Method
Author(s) -
ChangHyun Kim,
Ju Lee,
Hyung Woo Lee
Publication year - 2015
Publication title -
journal of electrical engineering and technology/journal of electrical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.226
H-Index - 27
eISSN - 2093-7423
pISSN - 1975-0102
DOI - 10.5370/jeet.2015.10.3.1244
Subject(s) - pid controller , control theory (sociology) , frequency domain , time domain , computer science , algorithm , domain (mathematical analysis) , control engineering , control (management) , engineering , mathematics , artificial intelligence , temperature control , mathematical analysis , computer vision
This paper proposes a new method for tuning a linear quadratic 7 proportional integral derivative controller for second order systems to simultaneously meet the time and frequency domain design specifications. The suitable loop-shape of the controlled system and the desired step response are considered as specifications in the time and frequency domains, respectively. The weighting factors, Q and R of the LQ controller are determined by the algebraic Riccati equation with respect to the limiting behavior and target function matching. Numerical examples show the effectiveness of the proposed LQ-PID tuning method.This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (No.20132010101870