全滑态输出反馈变结构调节器设计

针对多变量不确定线性系统，提出了一种新型的输出反馈变结构调节器的设计方案。在所构造的变结构控制律中引入一个调节因子，实现了仅依靠输出信息构造的调节器，并在滑动超平面中加入时变衰减项，基本消除了变结构控制中的能达阶段，增强了系统的抗参数摄动和外界干扰能力。仿真算例验证了该方法的有效性。

GlobalSliding-Mode Output Feedback Variable Structure Control

We propose a direct output feedback variable structure control to stabilize the uncertain system whose states are not available and can not be estimated. We choose a special set of switching functions as described by eq.(2), place the system first on the sliding hyperplane(i.e. the switching functions), and hold it there in order to obtain the upper bound of the states. The upper bound is calculated with eqs.(11) and (12), which are obtained after a detailed derivation. We call our proposed method GOVSC(global sliding mode output feedback variable structure control). Even though the states of uncertain system are unavailable and cannot be estimated, the bound of its initial states is known. GOVSC requires only the known bound of the initial states and output information for designing the controller. The controller so designed has a simple structure and can be easily implemented.