Buck变换器的离散时间全程滑模控制  

Discrete global sliding mode control for Buck converter

作　　者：郑艳[1] 高哲[1] 郭为安[1] 

机构地区：[1]东北大学信息科学与工程学院,沈阳110004

出　　处：《控制与决策》2009年第9期1380-1384,共5页Control and Decision

基　　金：国家自然科学基金项目(60274009)

摘　　要：针对含有匹配不确定项的线性离散时间系统,设计了一种全程滑模控制器,使系统状态在初始时刻就在切换区内.给出了一种双曲正切离散趋近律,由这种改进的趋近律所设计的控制器不但可以减小系统稳态误差,而且能够削弱系统的抖振强度.将该方法应用在Buck变换器的控制器设计中,对Buck变换器的电压进行跟踪控制,仿真结果验证了所给控制策略的有效性.An improved globe sliding mode controller is presented for a discrete-time linear system with matched uncertainties, which forces the system states into switching region initially. And a hyperbolic tangent discrete-time reaching law is designed, which can not only lower the system steady state error, but also can reduce the chattering phenomenon. Applications of the voltage tracking are implemented well on the Buck converter. The simulation results show the effectiveness of the proposed control strategy.

关 键 词：全程滑模 离散趋近律 抖振 BUCK变换器 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]