一种不确定离散时间系统的变结构控制  

Uncertain Discrete-Time Variable Structure Control System

作　　者：刘珺[1] 张荣[2] 

机构地区：[1]郑州大学数学系,河南郑州450000 [2]洛阳理工学院数理部,河南洛阳471003

出　　处：《洛阳理工学院学报（自然科学版）》2008年第1期75-78,共4页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

摘　　要：讨论了利用指数趋近律设计不确定离散变结构控制系统的问题,给出了改进的离散趋近律,得出了新的控制律,并证明了系统在此控制律下可以渐近趋于原点的性质,降低了系统的抖振,同时结合时延技术对干扰进行在线估计,抵消掉系统中的慢变不确定性。最后仿真结果证明了该方法的有效性。In this paper, the design of uncertain discrete variable structure control systems through usual reaching law is discussed. An improved discrete reaching law and a new control law based on it are given. Then the property that the systems can decreasingly approach to zero is proved, which can decrease system chattering and generates an on-line estimation by the mechanism of time delay to cancel the slowly varying uncertainties. The result of simulation shows the effectiveness of the scheme.

关 键 词：离散时间系统 变结构控制 不确定性估计 

分 类 号：O231[理学—运筹学与控制论]