预测滑模控制及其在Buck变换器中的应用研究  

Predictive Sliding Mode Control and Its Application in Buck Converter

作　　者：刘彬 葛芦生 伍孟涛 LIU Bin;GE Lusheng;WU Mengtao(School of Electrical and Information Engineering,Anhui University of Technology,Maanshan 243032,China)

机构地区：[1]安徽工业大学电气与信息工程学院,安徽马鞍山243032

出　　处：《现代信息科技》2023年第21期58-62,共5页Modern Information Technology

基　　金：国家自然科学基金面上项目(61973199)。

摘　　要：Buck变换器在面对内部参数摄动和外部负载扰动时,传统的双闭环PI控制无法实现较为满意的控制效果。为此,文章基于复合控制的思想,提出一种基于预测函数的离散滑模趋近律控制方法,并将其应用于Buck变换器的控制上。首先在Buck变换器的离散状态空间方程的基础上,设计出预测滑模控制器,得到控制量占空比的表达式,其次对预测滑模控制器进行稳定性分析,最后与传统的双闭环PI控制进行仿真对比,验证了所提控制器的优越性。When facing internal parameter perturbations and external load disturbances,the traditional dual closed-loop PI control cannot achieve satisfactory control results for Buck converters.Therefore,based on the idea of composite control,this paper proposes a discrete sliding mode approach law control method based on predictive function and applies it to the control of Buck converters.Firstly,based on the discrete state space equation of Buck converter,the predictive sliding mode controller is designed and the expression of the duty cycle of the control quantity is obtained.Secondly,the stability of the predictive sliding mode controller is analyzed.Finally,the simulation comparison with the traditional double closed-loop PI control verifies the superiority of the proposed controller.

关 键 词：BUCK变换器 离散滑模控制 预测函数控制 动态性能 

分 类 号：TP271.5[自动化与计算机技术—检测技术与自动化装置]