华中科技大学学报（自然科学版）2025，Vol.53Issue(1)：42-47,71,7.DOI:10.13245/j.hust.250086
基于模型解耦的Buck变换器滑模控制
Sliding mode control of Buck converters based on model decomposition
摘要
Abstract
For the voltage-controlled Buck converters,its performances are restricted by the circuit nonlinearity.In order to solve the problem,a sliding mode(SM)control approach was proposed based on model decomposition to improve the quality of power output.Based on the Kirchhoff's circuit theory,a unified mathematic model of buck converters in the both cases of switch on and off was established,following the traditional design of the voltage controller on the basis of the SM equivalent control theory.The voltage variable was chosen to construct a two-layer sliding surface,which differs from the traditional model decomposition.The current is also under the control.Then based on the output redefinition approach,the system was decomposed into an input-output subsystem and a zero dynamic subsystem.Therefore,the quality control of the power output was changed into the stability problem of the input-output subsystem.By combining the four cases,the relationship of the controller parameters and the system stability was deduced.Simulations validate this paper with advantages of fast response,good steady performance and wide application.关键词
滑模控制/直流变换器/二层滑模面/模型解耦/稳态性能Key words
sliding mode control/DC converter/the second layer sliding surface/model decomposition/steady state performance分类
信息技术与安全科学引用本文复制引用
王艳敏,张涵清,吴文谊,董志华..基于模型解耦的Buck变换器滑模控制[J].华中科技大学学报（自然科学版）,2025,53(1):42-47,71,7.基金项目
国家自然科学基金资助项目(51307035,62073095). （51307035,62073095）
