Adaptive discrete-time sliding mode control design and implementation for DC-DC buck converters with disturbances
WANG Zuo
LIU Peng
Abstract：DC-DC converters have been serving as indispensable components in energy conversion process,which play important roles in energy saving and efficiency promotion.In this paper,the output voltage regulation problem is addressed by applying disturbance observer based the adaptive discrete-time sliding mode control(ADSMC)algorithm.The tracking accuracy and disturbance rejection ability are significantly improved by introducing the second-order difference of dis-turbance estimations into the controller,which is provided by a novel discrete-time disturbance observer.The effects of disturbances are removed from the output voltage channel.Furthermore,an adaptive reaching law is implemented instead of constant gain to alleviate the control input chattering.Both dynamic and steady-state performance analysis are presented.Finally,experimental results are illustrated to demonstrate the elegant control performances.The comparative results show that stronger disturbance rejection ability and higher voltage tracking performances can be achieved even in the presence of multiple disturbances.
Keywords：DC-DC converterdiscrete-time sliding mode controladaptive reaching lawdisturbance observer
Publication Date：2023-11-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 1911-1919 )