考虑一类具有三角形结构和参数未知的不确定性非线性系统(1)。
A class of uncertain nonlinear systems (1) with a triangular structure and unknown parameters is considered.
模糊逻辑控制用来估计系统未知的不确定性因素，并同时保证了闭环系统在变结构控制到达阶段的鲁棒性。
The frizzy logic control is used to estimate the unknown uncertainties, and guarantees the robustness of the closed-loop system in the reaching phase synchronously.
以下是对不确定性的理性回应：之所以不采取任何行动旨在保护自己免遭未知的危险，也是为了争取时间来进行相关的了解。
That is a rational response to uncertainty: one freezes both to protect oneself against unknown dangers and to gain time for learning more about them.
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