observability system 可观系统
observability of singular system 广义系统的能观性
observability for nonlinear system 非线性系统能观性
System observability is examined and two necessary conditions for the system to be observable are obtained.
首先分析了系统的观测性，得出了系统可观测的两个必要条件。
From the system observability analysis, adding more kinds of external measurements into the inertial navigation system can enhance estimation accuracy of INS error.
通过对INS误差可观测性分析，可以看出增加不同种类的外部导航信息观测量，将有效提高INS误差修正能力。
The minimum number of sensors for observing a normal structure and a structure with repeated frequencies is studied respectively based on dynamic system observability.
根据结构系统可观性，分别给出了观测一般结构和重频结构的前若干阶目标模态所需要最少传感器数量的估计方法。
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