Observer‐based finite‐time output‐feedback controller for DC‐DC buck converters with unknown load variations. (24th July 2019)

• Record Type: Journal Article
• Authors: Cheng, Yingying; Jin, Qingchun; Du, Haibo; Xu, Yeyuan; Zhu, Wenwu; Jiang, Congrang
• Other Names: Quevedo Daniel E. guestEditor.; Chatterjee Debasish guestEditor.
• Is Part Of: International journal of robust and nonlinear control. Volume 29:Number 15(2019)
• Page Start: 5274
• Page End: 5289
• Publication Date: 2019-07-24
• Subjects: DC‐DC buck converter -- finite‐time control -- observer -- output‐feedback control; Automatic control -- Periodicals; Control theory -- Periodicals; Nonlinear systems -- Periodicals; 629.836
• DOI: 10.1002/rnc.4677
• Languages: English
• ISSNs: 1049-8923

Abstract

Summary: The output voltage regulation problem of a DC‐DC buck converter is investigated in this paper via an observer‐based finite‐time output‐feedback control approach. Considering the effects of unknown load variations and the case without current sensor, by using the technique of adding a power integrator and the idea of nonseparation principle, a finite‐time voltage regulation control algorithm via dynamic output feedback is designed. The main feature of the designed observer and controller does not need any load's information. Theoretically, it is proven that the output voltage can reach the desired voltage in a finite time under the proposed controller. The effectiveness of the proposed control method is illustrated by numerical simulations and experimental results.