基于扩张状态观测器的非线性系统故障诊断方法研究

摘要

在介绍扩张状态观测器理论的基础上,提出了一种应用于非线性系统的基于扩张状态观测器故障诊断的新方法,并给出了设计故障滤波器的方法,通过仿真实验证明所提供的方法相对于传统方法具有可以得到故障的近似函数,便于识别故障及故障识别效率更高,用时更短的优点.%This paper presents a novel fault detection and identification (FDD method for a class of nonlinear systems. An introduction of the ESO theory is given, and based on this theory a novel fault diagnosis filter is constructed for diagnosis of nonlinear system fault. Simulation examples illustrate the effectiveness and the outstanding feature of the method that it can detect and identify the shape and magnitude of system fault simultaneously.