摘要
为了克服未知输入对观测器的影响,防止在故障检测滤波器中出现错误的报警,以Chen和Patton提出的未知输入观测器的基本架构,设计了两个观测器。这两个观测器分别对故障敏感和不敏感,推导了两种情况下的误差方程,并且设计了残差。该残差能够与故障信号建立直接的联系,便于对故障的分析与诊断。该方法用于卫星姿控系统中,并且进行了仿真。
In order to overcome the influence of unknown input to observer,which may trigger fault alarm for fault detecion, this paper put forward a framework for fault detection based on unknown input observer proposed by Patton and Chen. Then two observers are designed. The two observer include one which is fault sensitive and the other non-sensitive one. The error equation in two kinds of situalions are derived, and the residual is designed. The residual establishes direct contact between fault and residual , and it is convenient for failure analysis and diagnosis. The method is used in satellite attitude control system, and model is simulated.
出处
《火力与指挥控制》
CSCD
北大核心
2012年第10期124-128,共5页
Fire Control & Command Control
关键词
航天器
故障检测
未知输入观测器
控制
spacecraft, fault detection, Unknown Input Observer （UIO）, control
