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存在未知时延和Markov丢包的网络控制系统故障检测与优化

DOI: 10.13195/j.kzyjc.2013.0772, PP. 1537-1544

Keywords: 网络控制系统,故障检测,时延及丢包,时域优化

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Abstract:

将网络控制系统(NCSs)的未知短时延处理成范数有界不确定性,结合Markov丢包影响将NCSs建模为不确定Markov跳变系统,设计模态依赖的鲁棒故障检测滤波器.为了提高检测系统性能,采用后置滤波器对残差信号进行时域优化,并以Moore-Penrose逆形式给出其最优解.同时,设计自适应检测阈值,并给出时变参数阵的迭代方法,降低了计算量.数值仿真表明,所提出的方法能够有效地抑制时延和丢包影响,提高故障检测系统的检测能力和检测速度.

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