具有未知输入线性系统观测器的设计与分析

Design and Study of Observer for Linear Systems with Unknown Input

对于一类具有未知输入的线性系统,本文提出了一种新的状态及未知输入观测器的设计方法,并给出了其存在的条件。对于此类观测器的正确性,本文做了严格的理论论证。最后,通过一个线性系统实例,利用本文所提出的观测器的设计方法,对其状态及未知输入观测器进行了设计。仿真结果表明,该观测器直接采用系统的测量输出,实现了对系统状态及未知输入渐近的估计。

For a class of linear systems with unknown input, this paper develops a new observer of state /unknown input and its existing condition. The strict verification to the observer is given. Through a example of linear system, using the proposed method, the observer of the linear system is designed. The simulation result shows that this kind of observer using only measured output, can asymptotically estimate the system抯 state and unknown input to any desired accuracy.