基于H_-/H_∞未知输入观测器的线性切换系统故障检测  

Fault detection for linear switched systems based on H_-/H_∞ unknown input observers

作　　者：王佳伟[1] 沈毅[1] 王振华[1] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001

出　　处：《控制与决策》2017年第11期1973-1979,共7页Control and Decision

基　　金：国家自然科学基金项目(61021002;61273162;61403104);中央高校基本科研业务费专项资金项目(HIT.KLOF.2015.076)

摘　　要：利用H_-/H_∞未知输入观测器方法研究线性切换系统的故障检测问题.将未知输入干扰分解为可解耦和不可解耦两部分,从估计误差中消除可解耦部分,再使用加权H_-/H_∞混合性能指标表示剩余未知输入和故障对残差的影响,将故障检测问题等价为加权H_-/H_∞未知输入观测器设计问题.根据平均驻留时间技术和多Lyapunov函数方法设计了故障检测器参数,并利用松弛矩阵方法得到了进一步的结果.通过一个仿真例子对所提出方法进行了验证.Fault detection for linear switched systems is studied by using the H-/H∞ unknown input observers method.Unknown input disturbance can be divided into two parts. Unknown input which can be decoupled is eliminated from the estimation error, and weighted H-/H∞ mixed performance index is used for representing the effect of fault and the remaining unknown input on residual. The fault detection problem of switched systems is equivalent to H-/H∞ unknown input observers design. The average dwell time technique and multiple Lyapunov functions are utilized for deriving parameters of fault detectors, and further results are obtained by introducing the slack matrix method. A simulation example is given to illustrate the effectiveness of the proposed method.

关 键 词：切换系统 故障检测 未知输入观测器 H-/H∞混合性能 平均驻留时间 多LYAPUNOV函数 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]