With the rate limiting element in man machine closed loop system, we analyse the PIO using the method of describing function.
然后将速率限制环节置于人机闭环系统中，利用描述函数法对驾驶员诱发振荡（ PIO）机理进行了研究。
Based on its good user interface, well function of man-machine interaction and simple and convenient operation, this system is strongly practicable.
该系统具有良好的用户界面及人机交互功能，操作简单、方便，实用性强。
This system has best function and property-the database management, data on the safe side, man-machine conversation interface and local keep secret.
该系统具有较强的数据库管理能力、网络传输数据的安全可靠性能、人机交流界面及局部保密功能。
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