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。
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.
作者
祝熙彤
孙瑀擎
周诺
徐红梅
ZHU Xitong;SUN Yuqing;ZHOU Nuo;XU Hongmei(Department of Electronic Information and Communication,Yanbian University,Yanji Jilin 133002,China)
出处
《太赫兹科学与电子信息学报》
北大核心
2020年第6期1141-1146,共6页
Journal of Terahertz Science and Electronic Information Technology
基金
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)。
