کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6595032 1423735 2018 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fault detection based on augmented kernel Mahalanobis distance for nonlinear dynamic processes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Fault detection based on augmented kernel Mahalanobis distance for nonlinear dynamic processes
چکیده انگلیسی
This paper presents a fault detection method based on augmented kernel Mahalanobis distance (AKMD) for monitoring nonlinear dynamic processes. In order to reflect the information of dynamic correlations, the measurements are stacked into augmented vectors at adjacent sampling instants. The augmented kernel Mahalanobis distance serves as the detection index, and its control limit is determined by the empirical method with assigning a significance level. Contrary to the mainstream of process monitoring methods based on principal component analysis (PCA), dimensionality reduction is not used here. The disadvantage of dimensionality reduction and space partition is discussed, and the improvement of fault detectability via data augmentation is analyzed. In addition, the computational complexity of the proposed method is acceptable. For training dataset containing m variables and n samples, if n ≫ m, the online computational burden of the proposed method is about O(n2). Simulations about a nonlinear dynamic process and the benchmark Tennessee Eastman process (TEP) both illustrate higher detection rates of the proposed method, compared with conventional multivariate statistical process monitoring (MSPM) methods such as PCA and its variants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Chemical Engineering - Volume 109, 4 January 2018, Pages 311-321
نویسندگان
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