摘要
针对航空发动机控制系统中最易发生故障的传感器,提出了基于状态观测器的故障诊断与自适应重构控制方法。设计了多个状态观测器用于传感器的状态估计,采用阈值判别法对传感器进行实时故障监视与诊断,并用正常传感器测量值的加权均值代替故障传感器测量值反馈回闭环系统,实现了对发动机闭环系统的自适应重构控制。数字仿真结果表明,该方法能及时准确地定位故障,并进行有效的自适应重构控制,将其应用于航空发动机的故障诊断与自适应重构控制是可行、有效的。
A method for fault diagnosis and adaptive reconfiguration control based on status observers was put forward for sensors liable to fail in aeroengine control system. Multiple status observers were designed to estimate the state of sensors. The threshold-value differentiate method was applied for real-time sensor fault monitoring and diagnosis. After that, adaptive reconfiguration control was realized with the average value of other normal sensors outputs substituting for fault sensor output feedback to closed loop system. Digital sim- ulation results showed that the method can exactly diagnose sensor fault in time and effectively realize adaptive reeonfiguration control. The method is feasible and effective when used to aeroengine for fault diagnosis and reconfiguration.
出处
《电光与控制》
北大核心
2009年第6期57-61,共5页
Electronics Optics & Control
基金
军队科研基金项目资助(KJ05146)
