中文摘要：

有为有未知输入的线性单个时间延期系统的内部延期的一个功能的观察员和还原剂顺序观察员的设计被讨论。观察员的存在的足够的条件，它是正常线性时间延期系统，和相应设计步经由线性矩阵不平等(LMI ) 被介绍。而且，稳定控制器的基于观察员的反馈被获得。三个例子被给显示出建议方法的有效性。

英文摘要：

The design of a functional observer and reduced-order observer with internal delay for linear singular timedelay systems with unknown inputs is discussed. The sufficient conditions of the existence of observers, which are normal linear time-delay systems, and the corresponding design steps are presented via linear matrix inequality（LMI）. Moreover, the observer-based feedback stabilizing controller is obtained. Three examples are given to show the effectiveness of the proposed methods.