基于自适应观测器的互联系统故障诊断

Fault Diagnosis Based on Adaptive Observer for Interconnected Systems

针对一类连续时间互联系统,研究了基于自适应观测的故障诊断问题。首先,利用互联子系统之间的关联信息,构造了互联系统分布式故障诊断观测器,并研究了基于传统自适应观测器的故障估计算法,在线实时故障各个子系统出现的故障。进一步,为了提升互联系统故障估计的性能,提出了快速自适应故障估计算法,显著改善了故障估计的快速性。最后,通过仿真实验验证了提出方法的有效性和可行性。

For a class of continuous-time interconnected systems,the problem of fault diagnosis based on adaptive observers is studied.Firstly,the distributed fault diagnosis observer of interconnected systems is constructed by using the correlation information between the interconnected subsystems,and the conventional adaptive observer-based fault estimation algorithm is studied to online real-time estimate the faults occurred in each subsystem.Furthermore,in order to improve the fault estimation performance of interconnected systems,a fast adaptive fault estimation algorithm is proposed,which significantly improves the fastness of fault estimation.Finally,the effectiveness and feasibility of the proposed method are verified by a simulation experiment.