DC/DC变换器混合逻辑动态建模与约束优化控制策略  

Mixed logical dynamical modeling and constrained optimal PWM control of DC/DC converters

作　　者：张聚[1] 谢作樟[1] 杨光利[1] 

机构地区：[1]浙江工业大学信息工程学院,浙江杭州310032

出　　处：《电机与控制学报》2012年第4期106-112,共7页Electric Machines and Control

基　　金：国家自然科学基金(60974042)

摘　　要：针对电力电子电路DC/DC(直流-直流)变换器同时存在着连续动态和离散切换两种不同类型的的混杂特性,引入N步建模方法,推导出DC/DC变换器的混合逻辑动态模型,用来描述变换器的动态特性、切换规律和系统中的约束关系。在此基础上,考虑控制输入约束和系统状态约束,应用混合整数模型预测控制方法,建立以脉冲宽度调制(PWM)为控制方式的DC/DC变换器状态反馈最优控制系统。数值仿真结果表明:DC/DC变换器基于混合逻辑动态建模的可行性,及在此基础上设计的优化控制系统具有良好的动态特性,并能满足系统的约束限制。For the hybrid features of power electronic circuit DC/DC converters with simultaneously existing continuous dynamics and switch properties, by using N-step modeling approach, a mixed logical dynamical （MLD） model of DC/DC converters is established to describe the continuous dynamics, the switch properties and the constraints in the DC/DC converters. Based upon the MLD model of DC/DC converters, with the mixed integer predictive control method, a state feedback DC/DC converters PWM predictive control system was developed, which can deal with the inputs and states constraints of the system. Numerical simulation results show the feasibility of the MLD model of DC/DC converters, and that the developed state feedback closed-loop control system has good dynamic characteristics, and can satisfy the constraints.

关 键 词：混合整数预测控制 DC/DC变换器 N步建模方法 混合逻辑动态模型 

分 类 号：TU313[建筑科学—结构工程]