基于LMI的H_∞鲁棒故障观测器的设计  

LMI based H_∞ design approach for robust fault observer

作　　者：肖佳伟[1] 席庆彪[1,2] 刘慧霞[2] 

机构地区：[1]西北工业大学自动化学院,西安710061 [2]西北工业大学第365研究所,西安710065

出　　处：《计算机工程与应用》2010年第29期76-79,共4页Computer Engineering and Applications

基　　金：国家自然科学基金No.60974146~~

摘　　要：针对飞机动态过程中由于噪声干扰造成故障检测误报的问题,构造一种新的基于LM(ILinear Matrix Inequality)的观测器。将此观测器作为残差产生器,利用H∞范数来衡量残差对于外界干扰的鲁棒性,通过抑制噪声对残差的影响来实现故障的准确检测,给出了鲁棒观测器各状态矩阵的求解方法。采用某型歼击机发生故障的纵向运动模型进行仿真验证,实验结果证明提出的方法能在噪声环境下及时准确地检测出故障,对噪声干扰具有一定的鲁棒性。Aiming at resolving the problem of fault detection mistake under the noise environment in aerial vehicle dynamic proeess,a new-style observer is constructed,which is based on the method of LMI. This observer is applied as residual generator,which uses H∞ norm to describe the robustness of the residual against external disturbance in fault detecting.The actuator fault can be detected accurately by restraining the noise effect and the solution of the robust observer estate matrices is deduced. A failure aerial vehicle＇s longitudinal model is applied in the simulation.The experimental results show that the design of this paper can cheek out the fault promptly and accurately and suppress noise effectively.

关 键 词：故障诊断 鲁棒观测器 线形矩阵不等式 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]