线性系统的状态可控性是系统的一种重要的特性，是线性系统理论中一个基本而重要的概念。
State controllability of a linear system is an important performance of a system and a basic and important concept of the linear system theory.
本文通过可控性分析和可观察性分析指出，现有的座舱压力控制系统不是状态完全可控制的，因而不是好的方法。
This paper shows by means of the analysis for controllability and observability that the present cabin pressure control system is not controllable for all states, so it is not a good method.
为了提高制造系统的可控性和运行效率，需要及时掌握其运行状态信息，并以此为依据采取相应的措施。
In order to improve the controllability and efficiency of manufacturing system, its status information should be hold in time, and then some corresponding measures are taken according to it.
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