一类切换系统的混沌行为分析及混沌控制研究  

Chaotic behavior analysis for a type of switched systems and its chaotic control

作　　者：罗文广[1,2] 于滢源[1] 谢广明[3] 蓝红莉[4] 

机构地区：[1]广西科技大学电气与信息工程学院,广西柳州545006 [2]广西汽车零部件与整车技术重点实验室,广西柳州545006 [3]北京大学工学院,北京100871 [4]广西科技大学计算机学院,广西柳州545006

出　　处：《深圳大学学报（理工版）》2013年第3期235-241,共7页Journal of Shenzhen University(Science and Engineering)

基　　金：广西省自然科学基金资助项目(0832067);广西汽车零部件与整车技术重点实验室基金资助项目(13-A-03-01)~~

摘　　要：针对易于产生不规则现象的Buck型变换器电路切换系统,建立系统模型,分析其系统稳定性.应用系统时域波形图、相轨迹图和分岔图分析该切换系统的混沌动力学行为.为保证该切换系统工作稳定,根据驱动-响应同步思想,采用粒子群优化(particle swarm optimization,PSO)算法进行控制器参数寻优,设计切换系统的PSO-PID控制器,使系统稳定地工作在单周期态.仿真结果表明,该控制器可将工作在混沌态的系统引入到周期态,有效抑制系统的混沌.A new circuit switching system model is presented to solve irregular phenomena often occurring in cir-cuit switching system, e.g. Buck type converter. The stability and chaotic dynamic behavior of the switched sys-tem was analyzed based on time-domain waveform, phase-trajectory diagram and bifurcation diagram. The PSO- PID controller is introduced to optimize the controller parameters with the use of drive-response synchronization and particle swarm optimization algorithm. The operation stability of the circuit switching system in a single-period state is therefore guaranteed. The simulation results show that the controller is able to lead the system from chaos to periodic states, and the chaos of the system is reduced efficiently.

关 键 词：混沌控制 切换系统 BUCK型变换器 电流连续模式 分岔图 周期态 PSO PID控制器 混沌同步 非线性系统 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TM46[自动化与计算机技术—控制科学与工程]