Open AccessFinite‐time disturbance observer based non‐singular terminal sliding‐mode control for pulse width modulation based DC–DC buck converters with mismatched load disturbances
Author(s) -
Wang Junxiao,
Li Shihua,
Yang Jun,
Wu Bin,
Li Qi
Publication year - 2016
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/iet-pel.2015.0178
Subject(s) - control theory (sociology) , pulse width modulation , converters , terminal sliding mode , buck converter , disturbance (geology) , observer (physics) , terminal (telecommunication) , sliding mode control , computer science , mathematics , voltage , engineering , physics , control (management) , telecommunications , nonlinear system , paleontology , artificial intelligence , quantum mechanics , electrical engineering , biology
This study investigates a finite‐time disturbance observer (FTDO) based non‐singular terminal sliding‐mode control (NTSMC) approach for pulse width modulation based DC–DC buck converters subject to matched/mismatched resistance load disturbances. Considering the mismatched resistance load disturbance which does not act in the same channel as the control input, a novel non‐singular terminal sliding‐mode manifold incorporating with a disturbance estimation technique is designed. A FTDO‐based NTSMC method is introduced for DC–DC buck converter systems. A rigorous finite‐time stability analysis is also presented. As compared with the nominal NTSMC and existed SMC+ extended stated observer (ESO) method, the proposed method obtains a better disturbance rejection ability no matter the disturbances satisfy the so‐called matching condition or not. Simulation and experimental comparison results are implemented to verify the effectiveness of the proposed control method.