基于等价空间的网络控制系统故障检测问题研究

研究了网络控制系统的故障检测问题。对于一类网络时延为不确定情况的网络控制系统,得到了系统的具有模型不确定性的离散时间模型。将等价空间故障检测方法中的等价向量扩展为等价矩阵的情况,进而可将残差产生器的设计问题归结为受线性矩阵不等式约束的多目标优化问题,并可应用线性矩阵不等式技术求解等价矩阵。同时还讨论了对残差评估问题。算例验证了提出方法的有效性。

Parity space-based fault detection for networked control systems

The problem of fault detection for a class of networked control systems(NCSs) is studied.Under the assumption of the network induced time-delays being unknown,a discrete-time system with model uncertainty is used to describe the dynamic behavior of the NCS.By introducing a parity matrix rather than the known parity vector case,the parity space-based fault detection approach is modified to the problem of residual generation.The design of the parity matrix can be formulated as a multi-objective optimization problem with constrains of linear matrix inequalities(LMIs).The problem of residual evaluation is also considered.A numerical example is given to illustrate the effectiveness of the proposed method.