Signed Directed Graph and Qualitative Trend Analysis-Based Method for Process Monitoring and Fault Diagnosis

摘要：

A combined signed directed graph (SDG) and qualitative trend analysis (QTA) method for process monitoring and fault diagnosis is proposed. In this method, every node in the model of SDG is monitored.When fault occurs, SDG is used to find possible faults and their consistent paths. For every consistent path, the trends of all the nodes on it are extracted and analyzed using QTA.And then backward reasoning according to trends of nodes (matching the trends of nodes with trends stored in the database from fault node to cause node) for every consistent path is done to get the most possible path and cause. Thus, this method combines the completeness property of SDG with the high diagnostic resolution property of QTA. The proposed method is tested on a tank-level3 system. The result shows that this method provides fast, reliable and accurate fault diagnosis.

关键词： signed directed graph qualitative trend analysis process monitoring fault diagnosis consistent path

作者: GAO Dong ZHANG Beike MA Xin

作者单位: College of Information Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China

会议类型: 国际会议

会议名称: The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)

会议地点: 北京

会议语种:英文

页码: 366-370

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）