Fault diagnosis using robust cascade observers with application to spacecraft attitude control  

作　　者：王宇雷 马广富 李传江 

机构地区：[1]Dept.of Control Science and Engineering,Harbin Institute of Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2011年第4期123-131,共9页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No. 60774062);the CAST Innovation Funding Project(Grant No. 20090604)

摘　　要：This paper proposes a new gyro and star sensor fault diagnosis architecture that designs two groups of cascade H∞ optimal fault observers using LMI for spacecraft attitude control systems.The basic idea of the approach is to identify the gyro fault to good effect first and then makes a further diagnosis for the star sensor based on the former.The H∞ optimal fault observer in design has the robustness with respect to model uncertainties and diagnosis uncertainties.Its robustness to unknown inputs is as a special study in frequency domain.Finally,simulation results demonstrate the effectiveness and feasibility of the proposed control algorithm.This paper proposes a new gyro and star sensor fault diagnosis architecture that designs two groups of cascade H∞ optimal fault observers using LMI for spacecraft attitude control systems. The basic idea of the approach is to identify the gyro fault to good effect first and then makes a further diagnosis for the star sensor based on the former. The H∞ optimal fault observer in design has the robustness with respect to model uncertainties and diagnosis uncertainties. Its robustness to unknown inputs is as a special study in frequency domain. Finally, simulation results demonstrate the effectiveness and feasibility of the proposed control algorithm.

关 键 词：spacecraft attitude control system fault diagnosis H∞ optimal fault observer cascade observer 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]