Process Monitoring for Multimodal Processes With Mode-Reachability Constraints
Process Monitoring for Multimodal Processes With Mode-Reachability Constraints
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DOI：
10.1109/tie.2017.2677351
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发表时间：
2017-03
影响因子：
7.7
通讯作者：
Muhammad Shahzad Afzal;W. Tan;Tongwen Chen
中科院分区：
文献类型：
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作者：
Muhammad Shahzad Afzal;W. Tan;Tongwen Chen
为了提高效率和盈利能力，许多流程具有多种操作模式。根据标准操作程序进行不同操作模式的切换。这些程序是通过考虑各个子系统和设备的安全和操作限制来制定的，从而对过程模式的切换进行了限制。本文提出了一种基于隐马尔可夫模型的监控方法，该方法不仅可以处理过程数据的多模态，而且可以捕获模式切换限制。提出了一种两步Viterbi算法在故障情况下进行有效的模式检测，并提出了一种基于重构的故障隔离算法来构建贡献图。应用实例验证了该监测方法的有效性。
For increased efficiency and profitability, many processes have multiple modes of operation. Switching between different operating modes is performed according to the standard operating procedures. These procedures are set by considering safety and operating limitations of various subsystems and equipment, and thus put restrictions on the switching of the process modes. In this paper, a hidden Markov model based monitoring method is proposed that can not only handle the multimodality of process data but can also capture the mode switching restrictions. A two-step Viterbi algorithm is proposed for effective mode detection in the event of faults, and a reconstruction-based fault isolation algorithm is developed to build the contribution plots. Application examples demonstrate the effectiveness of the proposed monitoring method.