摘要
大多数关于变换器分岔和混沌的研究都是以电源电压作为变量进行分析和控制的,而实际中负载内阻也影响到系统的分岔和混沌。以PWM模拟控制Buck变换器为研究对象,利用计算机仿真电路得到以电阻阻值为自变量的分岔图;利用硬件实验电路对单周期稳定、倍周期分岔和混沌三种不同状态进行相图分析;采用参数扰动实现混沌控制,从分岔图可以看到原先的三种不同状态均被控制为单周期稳定状态,从硬件实验得到的时域波形图验证了控制算法的有效性。
In many studies, the bifurcation and chaotic phenomena of converters were obtained with input DC voltage as parameters. But in practice the load resistance also influences the bifurcation and chaos. Buck converter with analog voltage PWM control Loop was explored. The bifurcation diagrams of buck converter varied with load resistance were given by computer simulation. Three different states including single cycle stability, period-doubling bifurcation and chaos were analyzed by phase diagrams using hardware circuit experiment. Ott-Grebogi-Yorke was used as a chaotic control scheme. It could be seen in bifurcation diagrams that all the three different states before were changed to be single cycle stability. It was verified by the experimental time domain waveform figures.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2014年第2期394-397,共4页
Journal of System Simulation
基金
国家自然科学基金面上项目(61074016)
上海市教育委员会科研创新项目(09YZ214)
上海理工大学光电学院教师创新能力建设项目
关键词
混沌
分岔
BUCK变换器
非线性
相图
chaos
bifurcation
buck converter
nonlinear
phase diagram
