【毕业论文】Buck电路非线性建模及仿真.doc

湖北民族学院科技学院 毕业论文（设计） Buck变换建模非线性 学生姓名： 学 号： K0310415 系 别： 工程系 专 业：电气及其自动化 指导教师： 余志强 评阅教师： 论文答辩日期 答辩委员会主席 摘 要 DCDC(直流斩波器)开关变换器的建模分析是研究开关电源的基础，对开关电源的分析与设计具有重要的意义。传统的理想模型和实际电路之间的差异是开关变换器建模不可忽略的重大问题。围绕该问题，本文对开关变换器的建模分析进行了深入的研究，有助于开关电源的性能优化和设计效率的提高。在对开关变换器建模方法的现状及发展趋势进行深入分析的基础上，换器为例，通过建模仿真验证了Buck Boost变换器在CCM（电流连续模式）模式下的离散数学模型并且分析其稳定性和混沌特性。分别基于(矩阵实验室)建立相关模型 该课题设计是验验证Buck Boost（升压降压转换器）变换器分叉和混沌现象的动态演示过程并得出相应的仿真结果；同时运用无源反馈的控制方法实现了变换器的混沌控制，该方法使非线性可以有效的实现变换器的电流能够得到得以稳定的控制。利用离散数学混沌法建模利用大量合适的数值进行仿真得出相应的图形数据得出相应的结论分析，同时也要观察数据图形得出特殊值以及特殊现象的记录，还要借助已有的理论知识的铺垫来解释仿真实验的结果。并且实现混沌系统的稳定最优控制方案的解决，得到非线性的方法的最结论在离散混沌建模的背景下。 关键词Buck变换器，，， Abstract Modeling and Analysis of DC/DC switching converter switching power supply basic research has important implications for the analysis and design of switching power supply. Differences between traditional ideal model and the actual circuit is a major issue between the switching converter modeling can not be ignored. Around this problem, this paper analyzes the modeling of DC/DC switching converter conducted in-depth studies to help optimize the performance and design of switching power supply efficiency. Based on the current situation and development trend of DC/DC switching converter modeling methods in-depth analysis on the converter, for example, through modeling and simulation to verify the mathematical model of discrete Buck Boost converter in CCM and analyze its stability and chaotic. Related models were based on Matlab established The test subject is designed to verify Buck Boost Converter bifurcations and chaos in dynamic presentation process and draw the corresponding simulation results; while the use of passive feedback control method to achieve the chaos control of the converter, which can effectively make the nonlinear current converter to achieve a stable control can be obtained. Mathematical modeling method using discrete chaotic use o