具有线性输出结构的非线性系统故障诊断和容错控制  

Fault Diagnosis and Fault-Tolerance Control for Nonlinear Systems with Linear Output Structure

作　　者：王宏[1] 沈岭[1] 岳红[1] 

机构地区：[1]中科院自动化研究所,北京100080

出　　处：《应用科学学报》2005年第6期620-624,共5页Journal of Applied Sciences

基　　金：中科院知识创新工程重大项目(KGCX-SW-15)

摘　　要：研究了一类具有线性输出结构的非线性系统故障诊断和容错控制,利用自适应观测器来构造线性残差,同时构造李亚普诺夫函数,使其一阶导数为负来得到故障估计值,容错控制部分设计了2个自适应观测器,通过控制器重组使故障发生后的系统输出跟踪原系统输出.理论分析和仿真结果证明了该方法的有效性.A new formulation of fault diagnosis and fault-tolerant control algorithm is presented for a class of nonlinear dynamic systems with a linear output structure. A Lyapunov-based adaptive observer is proposed to produce a residual signal. The fault estimate guarantees negativity of the first order derivative of the Lyapunov function using Lyapunov analysis. Two adaptive observers are designed for fault-tolerant control, and the system output after occurrence of a fault tracks the output of the original system through a nonlinear controller reconfiguration. Simulation results show the effectiveness of the proposed algorithm.

关 键 词：非线性系统 李亚普诺夫函数 自适应观测器 故障诊断 容错控制 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]