中文摘要：

针对带未知时滞的非线性系统进行讨论,通过一个对Barbalat’s引理和一个激发持续性结果的合适扩展性结论,结合关于扰动和时变参数的状态输入稳定性理论,给出了一个鲁棒自适应观测器.

英文摘要：

Nonlinear systems with unknown time delay is discussed.Through a suitable extension of Barbalat＇s Lemma and a persistency of excitation result,combined with state and time-varying parameter perturbations on input stability theory,provided a definition of robust adaptive observers.