传统采用极点配置方法的自适应观测器存在区域不稳定的问题，针对此缺陷提出了一种基于线性矩阵不等式的新型观测器。
Traditional observer that using the pole - placement technique exist the problem of unstable regions, a new observer based on linear matrix inequalities is proposed for this problem.
该方法把闭环系统的全部极点配置在复平面左半面的一个特定的区域之内，使闭环系统具有预期的稳定度。
The method assigns all poles of the closed system to a special region in the left side of the complex plane to make the closed system obtain a desired degree of stability.
利用LMI给出了带有不确定性扇形区域极点配置的可靠控制器存在的充分条件。
Based on LMIs, a sufficient condition for the existence of reliable control with uncertainty of pole configuration is given.
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