然后，在系统状态不完全可测的情况下，通过设计高增益观测器对系统的状态进行估计，实现输出反馈控制器设计。

Then we design the output feedback controller by introducing the estimator of the states for the case where system states are unknown.

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针对传统基于开环的汉字识别系统不完全符合人类识字过程的问题，构建了一种具有反馈结构的仿人智能识别系统。

Due to the difficulty of conforming to human recognition process with traditional open loop recognition system, a simulated intelligent recognition system with feedback structure was constructed.

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