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电压模式Buck-Boost变换器变论域模糊PI控制
祝熙彤, 孙瑀擎, 周 诺, 徐红梅
延边大学 电子信息通信学院,吉林 延吉 133002
摘要:
电压模式Buck-Boost变换器是一个典型的非最小相位系统。根据DC-DC Buck-Boost变换器的工作特性,运用状态空间平均法建立其小信号模型,据此设计PI控制器参数。Buck-Boost变换器是一个时变的非线性系统,传统PI控制难以达到最优的控制效果,由此采用模糊PI控制来规避PI控制的弊端。针对模糊PI控制在被控量变化较大时,控制精确度变差的问题,设计了模糊论域自适应伸缩变化的变论域模糊PI控制器,对Buck-Boost电路进行控制。通过Matlab/Simulink环境仿真,实验结果表明,变论域模糊PI控制具有更好的动态控制性能。
关键词:  电压模式  Buck-Boost变换器  变论域  模糊PI控制  Matlab/Simulink仿真
DOI:10.11805/TKYDA2019373
分类号:
基金项目:延边大学博士启动基金资助项目(602014093);延边大学2017年度国家自然基金前期培育专项资助项目(413080016)
Variable universe fuzzy PI control of voltage mode Buck-Boost converter
ZHU Xitong, SUN Yuqing, ZHOU Nuo, XU Hongmei
Department of Electronic Information and Communication,Yanbian University,Yanji Jilin 133002,China
Abstract:
Voltage mode Buck-Boost converter is a typical non-minimum phase system. According to the working characteristics of the DC-DC buck-boost converter, the small signal model is established by using the state space average method, and the Proportional-Integral(PI) controller parameters are designed. Buck-Boost converter is a time-varying nonlinear system. Traditional PI control is difficult to achieve the optimal control effect, so the fuzzy PI control is adopted to avoid the disadvantages of PI control. Aiming at the problem that the control precision of fuzzy PI control becomes worse when the controlled variable changes greatly, a variable universe fuzzy PI controller with adaptive scaling change in the fuzzy universe is designed to control the Buck-Boost circuit. Through Matlab/Simulink environment simulation, the experimental results show that the variable universe fuzzy PI control has better dynamic control performance.
Key words:  voltage mode  Buck-Boost converter  variable universe  fuzzy PI control  Matlab/Simulink

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