非线性系统的鲁棒H^∞输出反馈控制

研究了带有时变参数不确定的非线性系统的鲁棒 H∞ 输出反馈控制问题 ,此不确定性包含在所有系统矩阵中并受到某种积分函数限制。建立了非线性鲁棒 H∞ 控制问题与相应一般非线性系统的 H∞ 控制问题之间的等价关系 ,从而通过求解不包含参数不确定的辅助非线性系统的标度 H∞ 控制问题来获得非线性鲁棒 H∞ 控制问题的解。

线性时滞系统时滞相关H~∞输出反馈控制器设计

对于存在状态时滞的线性时滞系统，研究了无记忆时滞相关Ｈ∞输出反馈控制器分析和综合问题，通过解两个相应的Ｒｉｃｃａｔｉ矩阵不等式即可求得满足设计要求的Ｈ输出反馈控制器，所得结论与时滞无关Ｈ输出反馈控制器相比具有较小的保守性．最后给出一个仿真实例以说明结论的有效性．

Static Output Feedback H_∞ Controllers Design for Descriptor Linear Systems Based on LMI

This paper considers the design problem of static output feedback H ∞ controllers for descriptor linear systems with linear matrix inequality (LMI) approach. Necessary and sufficient conditions for the existence of a static output feedback H ∞ controller are given in terms of LMIs. Furthermore, the design method of H ∞ controllers is provided using the solutions to the LMIs.

Robust H∞ output feedback control for a class of uncertain Lur＇e systems with time-delays

In this work, the analysis of robust stability and design of robust H∞ output feedback controllers for a class of Lur'e systems with both time-delays and parameter uncertainties were studied. A robust H∞ output feedback controller based on Linear Matrix Inequalities (LMIs) was developed to guarantee the robust stability and H∞ performance of the resultant closed-loop system. The presented design approach is based on the application of descriptor model transformation and Park's inequality for the bounding of cross terms and is expected to be less conservative compared to reported design methods. Finally, illustrative examples are advanced to demonstrate the superiority of the obtained method.