سال انتشار: ۱۳۹۱
محل انتشار: بیستمین کنفرانس مهندسی برق ایران
تعداد صفحات: ۵
Mohammad Mokhtare – Department of Mechatronics, Science and Research Branch, Islamic Azad University, Tehran,Iran
Somayeh Hekmati Vahed –
Mahdi Aliyari Shoorehdeli – Faculty of Electrical Engineering, Mechatronics Dept, K.N. Toosi University of Tech. Tehran, Iran
Alireza Fatehi – Faculty of Electrical Engineering, Mechatronics Dept, K.N. Toosi University of Tech. Tehran, Iran
In this paper Fault Detection and Isolation (FDI) is shown as a pattern classification problem which can be solved using clustering techniques. Gath-Geva clustering (GGC) isexploited as optimal form by a performance assessment rule for fault detection, while multistage Gath-Geva clustering isemployed for the intent of fault isolation. Furthermore since Visbreaker unit is a large scale process, a novel hybrid method on the basis of Principle Component Analysis and GeneticAlgorithm optimization was also proposed in order to cope with the curse of dimensionality and complexity of computationproblems. There are two main percentile criteria for validation of fault detection namely specificity and sensitivity. Evaluationof fault isolation has been depicted in confusion matrix. For analysis and visualization of the correlated high dimensional data, PCA maps the data point into lower dimensional space.The proposed FDI approaches have been evaluated through experimental Visbreaker process unit data collected in oil refinery.