be completely unknown

The objective is to design an observer such that estimation error can be completely decoupled from the unknown input ( disturbance or fault ) .

目标是设计适当的观测器，使得观测误差与作用在系统中的未知输入（干扰、故障）解耦。

The unknown input observer with H ∞ performance is dealt with when the observer error can not be completely decoupled from the unknown input .

进一步在未知输入和观测误差不能完全解耦的情况下，讨论了具有H∞性能未知输入观测器的设计问题。