非线性不确定性系统的变结构控制策略研究

Research on a New Variable Structure Control Law for Non-Linear Plants with Uncertainties

针对具有匹配和失配不确定性因素的非线性单变量时变系统，研究了一种新的变结构控制律的设计方法，提出了完全基于对象标称模型和不确定性因素上下界的逻辑极值控制律形式，以保证变结构控制系统渐近稳定或最终有界。

In this paper, a new variable structure control law that is called logic and extreme control law is proposed for nonlinear single--input time-variant plants with matched or mismatched uncertainties. Its design method, which is totally based on the plant ideal model andthe uncertaintiesl extreme values, is also studied' Meanwhile, some direct and general relat.ions between the uncertainties and the control laws' parameters are established. No matterwhat concrete. forms the uncertainties have, the control law designed here ensures that thesliding mode exiSts and the closed loop control system is aspepototically stable or ultimatebounded The results sot in this paper are suited to many areas, such as guided missiles, aircrafts and satellites.