基于输入输出反馈线性化三态Boost DC/DC变换器的新型控制策略  

A new control strategy of a tri-state boost DC/DC converter based on input-output linearization

作　　者：刘兆娟[1] 刘锦波[1] 

机构地区：[1]山东大学控制科学与工程学院,山东济南250061

出　　处：《山东大学学报（工学版）》2008年第1期43-47,共5页Journal of Shandong University（Engineering Science）

基　　金：山东省中青年科学家基金资助项目(03BS093)

摘　　要：针对Viswanathan K为消除普通BOOST DC/DC变换器的非最小相位特性而提出的三态Boost DC/DC变换器,为进一步提高这种电路拓扑的性能,在建立了变换器状态空间平均模型的基础上,针对其多变量、非线性特点,采用输入输出线性化将其转化为一个完全可控的线性系统,在此基础上应用现有成熟的线性控制策略进行了控制系统的设计,并且采用MATLAB进行仿真验证,结果表明:这种非线性控制策略可以确保输出电压在大范围内恒定可调,且即使存在大范围扰动(输入电压和负载变化均较大)的情况下,系统也可以确保稳定性和良好的动态性能.In order to eliminate the influence caused by the non-minimum phase characteristic of a common Boost DC/DC converter, Viswanathan K has proposed a novel tri-state Boost DC/DC converter. For enhancing perfomance, the state-spaee averaging model of this converter was first presented in this paper. Due to the nonlinear nature in this model, an input-output feedback linearization technique was adopted, and a complete controllable linear system was obtained. Then a state-feedback control strategy was designed based on this linear system. Simulation results show that the proposed control strategy can assure constant output voltage in a wide range, so as to realize the stability of the system during large fluctuation of power supply and load disturbance. Good dynamic performance can also be achieved.

关 键 词：三态Boost DC/DC变换器 非最小相位系统 输入输出线性化 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]