基于多频H_∞最优观测器的航天器故障诊断  

Application of fault diagnosis on satellite attitude control system using multiple frequency H_∞ observers

作　　者：王宇雷[1] 李传江[1] 马广富[1] 张德新[1] 

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《辽宁工程技术大学学报（自然科学版）》2010年第3期443-446,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(60774062);CAST创新基金资助项目(20090604)

摘　　要：针对航天器姿态控制系统中的陀螺故障,利用控制输入信息,依据故障信号频率,使用LMI分别设计多组H∞最优故障观测器。该方法无需其他测量校验,能够克服传统诊断方法对星敏感器的依赖;同时扩展H∞观测器的设计自由度,降低惯量不确定性对系统诊断精度的影响。在Matlab/Simulink环境下对航天器姿态系统进行了仿真,仿真结果表明:提出的控制算法处理航天器陀螺故障问题的有效性和可行性。In order to do gyro fault diagnosis for satellite attitude control system,a series of multiple frequency H∞ optimal fault observers are designed using LMI based on input information and the different frequencies of the faults.This method does not require other measured rectification.Thus the diagnosis can be independent of star sensors.Also,it extends a design freedom such that the H∞ observers can mitigate the impact on the diangosis caused by inertial uncertainty.In the study,a simulation on spacecraft attitude system is conducted using Matlab/Simulink softwares.The simulated results demonstrate the effectiveness and feasibility of the proposed control algorithm.

关 键 词：航天器姿态控制系统 故障诊断 H∞最优故障观测器 多频观测器 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]