Open AccessA graphical approach for controller design with desired stability margins for a DC–DC boost converter
Author(s) -
Kalim Md. Imran,
Ali Ahmad
Publication year - 2021
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/pel2.12102
Subject(s) - phase margin , control theory (sociology) , pid controller , robustness (evolution) , loop gain , automatic gain control , controller (irrigation) , computer science , dc bias , mathematics , voltage , engineering , electronic engineering , control engineering , control (management) , amplifier , operational amplifier , temperature control , agronomy , biochemistry , chemistry , electrical engineering , cmos , artificial intelligence , biology , gene
A novel graphical tuning method of PID controller for output voltage regulation of a DC–DC boost converter is proposed. The advantage of the presented method is that the desired robustness level in terms of gain and phase margins can be pre‐specified. A technique to limit the noise level in the control signal to a pre‐specified value by selecting the derivative gain ( k d ), is also discussed. Simplicity of the technique is an added advantage. Concept of root crossing boundaries along with the gain phase margin tester is applied to compute constant gain and phase margin boundaries in the controller parameters plane. The overlapping area of constant gain and phase margin boundaries within the all stability region is the desired gain and phase margin region (DGPMR). Controller parameters are obtained by computing the centroid of the triangular convex region of the DGPMR. Effectiveness of the proposed tuning strategy is illustrated by simulation and hardware experimental results. Furthermore, the proposed method yields improved closed‐loop performance compared to a recently reported tuning strategy in nominal as well as perturbed scenarios.