本文对美国Wisconsin大学B.A.Ogunnaike在其博士论文中提出的一种设计滞后观测器的新方法进行研究指出,Ogunnaike的滞后观测器要求被观测系统必须满足在任何控制作用下,不可测状态渐近稳定的条件。事实上,一般系统是不满足这一要求的。文章指出了Ogunnaike对滞后观测器存在的充要条件在证明过程中的错误,对该观测器提出异议。 In this paper, a new method of designing a lag observer proposed by BAOgunnaike of the University of Wisconsin in his Ph.D. thesis is studied. The observer of Ogunnaike’s lag observer requires that the observed system must satisfy the asymptotic stability of the unmeasurable state under any control action conditions of. In fact, the general system does not meet this requirement. The paper points out the error in Ogunnaike’s proof of the existence of the necessary and sufficient conditions for the existence of a lag observer, and challenges the observer.