Journal
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
Volume 63, Issue 4, Pages 551-560Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSI.2016.2529238
Keywords
DC-DC buck converters; disturbance observer; performance recovery; robustness performance; unmatched uncertainties
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Funding
- National Natural Science Foundation of China [61203011, 61473080, 61403227, 61573099]
- Natural Science Foundation of Jiangsu Province [BK2012327, BK20130018]
- Chinese Postdoctorial Science Foundation [2013M540406, 2014T70455]
- Fundamental Research Funds for the Central Universities
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A disturbance observer-based control (DOBC) approach is proposed in this paper for control design and qualitative robustness analysis of PWM-based DC-DC buck power converters. A disturbance compensation gain is constructed for the composite control algorithm to cancel the unmatched uncertainties in the output voltage channel. Rigorous criterion is provided to show the quantitative robustness between controller parameters and circuit uncertainties. The DOBC approach delivers not only a promising disturbance rejection performance but also a superior property of tracking performance recovery. The feasibility and efficiency of the proposed approach is validated by experimental results based on LabVIEW real-time control test setup.
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