摘要
研究了一类含有未知输入干扰和模型不确定性的时滞系统故障诊断问题。通过变换,原系统被分成两个子系统,一个子系统不受故障的影响,可以设计鲁棒观测器;另一个子系统受到故障的影响,但是它的状态可以通过测量得到。设计的观测器利用解析冗余方法能够对执行器故障和传感器故障进行诊断。仿真结果表明,算法具有良好的诊断性能。
deals with the fault diagnosis problem for a class of linear systems with delayed state and uncertainty. The systems are transformed into two different subsystems. One is not affected by actuator faults, so the robust observer can be designed under certain condition. The other whose states can be measured is affected by the faults. The proposed observer is utilized in an analytical-redundancy-based approach for actuator and sensor fault detection and diagnosis in time-delay systems. Finally, the applicability and effectiveness of the proposed method is illustrated through numerical examples.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2005年第9期1608-1613,共6页
Systems Engineering and Electronics
基金
国家自然科学基金资助课题(60274058)
关键词
故障诊断
鲁棒观测器
线性系统
时滞
不确定性
fault detection and diagnosis
robust observer
linear systems
time delay
uncertainty