Model-based actuator fault accommodation for distributed parameter systems represented by coupled linear PDEs
Model-based actuator fault accommodation for distributed parameter systems represented by coupled linear PDEs
复制标题
用于耦合线性偏微分方程表示的分布式参数系统的基于模型的执行器故障调节
DOI：
10.1109/cca.2015.7320739
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
S. Jagannathan
中科院分区：
文献类型：
--
作者：
Jia Cai;H. Ferdowsi;S. Jagannathan
针对一类用耦合偏微分方程描述的分布参数系统，提出了一种基于模型的故障检测与调节方法。考虑了执行机构在边界条件下的故障。假设状态信息是可用的，基于DPS的线性PDE表示提出了检测观测器。当检测到故障时，在观测器中加入自适应项来估计故障参数向量，并通过重新配置控制输入来实现故障调节。提出了一种估计未知故障参数向量的更新律。提出了一种利用参数向量估计调节时间（TTA）的显式公式。最后通过一个算例验证了所提方案的有效性。
A model-based fault detection and accommodation scheme is introduced for a class of distributed parameter systems (DPS) described by coupled partial differential equations (PDEs). Actuator faults at the boundary condition are considered. A detection observer is proposed based on the linear PDE representation of the DPS by assuming that the state information is available. Upon detecting a fault, an adaptive term is added to the observer to estimate the fault parameter vector which is utilized for fault accommodation by reconfiguring the control input. An update law is proposed to estimate the unknown fault parameter vector. An explicit formula is proposed to estimate the time-to-accommodation (TTA) by using the parameter vector. Finally, an example to demonstrate the effectiveness of the proposed scheme is included.