Open AccessQuasi-Continuous Second-Order Sliding Mode Control of Buck Converter
Author(s) -
Li Ma,
Yifan Zhang,
Xiaofei Yang,
Shihong Ding,
Lili Dong
Publication year - 2018
Publication title -
ieee access
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 127
ISSN - 2169-3536
DOI - 10.1109/access.2018.2795027
Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation
Aiming at the chattering problem of conventional sliding mode control systems for dc-dc converters, a quasi-continuous second-order sliding mode (QSOSM) control scheme for buck converters has been presented in the paper. It will be shown that the QSOSM controller is practically a continuous function of the states everywhere except the origin. And thus the chattering problem existing in conventional sliding mode can be practically solved due to the fact that the states cannot be stabilized to the origin from engineering point of view. Theoretical analysis also shows that the closed loop system of the buck converter is globally finite-time stable. Finally, the theoretical considerations have been verified by simulation and experimentation. Specifically, the comparisons between QSOSM controller and PID controller show that the former one provides a better robustness.
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