Extended state observer-based sliding mode control for PWM-based DC–DC buck power converter systems with mismatched disturbances
- Author(s): Junxiao Wang 1 ; Shihua Li 1 ; Jun Yang 1 ; Bin Wu 1 ; Qi Li 1
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View affiliations
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Affiliations:
1:
Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education, School of Automation, Southeast University, Nanjing, Jiangsu 210096, People's Republic of China
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Affiliations:
1:
Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education, School of Automation, Southeast University, Nanjing, Jiangsu 210096, People's Republic of China
- Source:
Volume 9, Issue 4,
26 February 2015,
p.
579 – 586
DOI: 10.1049/iet-cta.2014.0220 , Print ISSN 1751-8644, Online ISSN 1751-8652
This study investigates an extended state observer (ESO)-based sliding mode control (SMC) approach for pulse-width modulation-based DC–DC buck converter systems subject to mismatched disturbances. By designing a novel sliding-mode manifold incorporated with a disturbance estimation technique, an ESO-based SMC method is designed to deal with mismatched disturbances. A rigorous stability analysis is also presented. As compared with the nominal SMC method, the proposed method obtains a better disturbance rejection ability even the disturbances do not satisfy the so-called matching condition. Simulations and experimental comparison results are implemented to verify the effectiveness of the proposed control method.
Inspec keywords: DC-DC power convertors; observers; PWM power convertors; power system control; stability; variable structure systems
Other keywords: extended state observer-based sliding mode control; stability analysis; ESO-based SMC method; PWM-based DC–DC buck power converter systems; mismatched disturbances; disturbance estimation technique; nominal SMC method; disturbance rejection ability
Subjects: Stability in control theory; Multivariable control systems; DC-DC power convertors; Simulation, modelling and identification; Power system control; Control of electric power systems
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