控制理论与应用2021，Vol.38Issue(6)：766-774,9.DOI:10.7641/CTA.2020.20181
Buck变换器的降阶扩张状态观测器与无抖振滑模控制
Chattering free sliding mode control based on reduce order extended state observer method for a DC-DC Buck converter system
摘要
Abstract
A novel chattering free sliding mode control (SMC) based on a reduced-order extended state observer (RESO) is proposed for a pulse width modulation based DC-DC buck converter with total disturbances and chattering. First, a novel tracking error state space model is introduced to define the matched and mismatched disturbances as a uniform matched disturbance. Second, a RESO is designed to improve estimation rapidity of tracking error differentiation and system disturbances. Moreover, the influence of load mutation, input voltage variation and system parameter uncertainties can further be attenuated by RESO via a feedforward channel. Third, an estimation of tracking error differentiation based sliding mode controller is designed to attenuate the disturbance estimation error, since the rapidity and accuracy of the buck converter voltage tracking can be improved due to achievement of the chattering free by defining the switching gain of sliding mode controller as zero. In addition, Lyapnuov stability criterion is developed to prove the stability of the proposed closed-loop controller. Finally, the simulation results show that the proposed method can effectively improve the robustness and dynamic performance of Buck converter by attenuating the chattering and total disturbances.关键词
Buck变换器/滑模控制/降阶扩张状态观测器/跟踪误差状态空间模型/无抖振Key words
Buck converter/sliding mode control/reduce-order extended state observer/tracking error state space /model/chattering free引用本文复制引用
王书旺,李生权,哀薇,李娟..Buck变换器的降阶扩张状态观测器与无抖振滑模控制[J].控制理论与应用,2021,38(6):766-774,9.基金项目
Supported by the National Natural Science Foundation of China(61903322,61773335),the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(LAPS19003),the State Key Laboratory of Mechanics and Control of Mechanical Structures(MCMS-E-0520G01),the Six Talent Peaks Foundation of Jiangsu Provincial(KTHY2018038),the Natural Science Foundation of Yangzhou City for Outstanding Young Scholars(YZ2017099)and the Postgraduate Research&Practice Innovation Program of Jiangsu Province(SJCX20-0890). （61903322,61773335）
