针对一类伴有外界干扰的线性系统,探讨了执行器故障重构的问题.首先,使用高增益近似微分器得到输出导数的估计值.然后,构建一种未知输入观测器,实现对外界干扰和执行器故障解耦,可以渐近跟踪系统的状态.基于状态和输出导数的估计值,使用代数方法可以直接重构系统的执行器故障.仿真结果表明,所提出的方法是有效的.%A method of reconstructing actuator faults for a kind of linear systems is considered. By using high-gain observers, the estimate of output derivative can be achieved. Then a reduced-order observer which can asymptotically track system state is constructed. Through employing the estimates of both the state and the derivative, the actuator faults can be reconstructed. The simulation results to a real model shows that the proposed method is effective.
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