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- W2908238436 abstract "The performance of fault diagnosis is highly dependent on the representation of fault characteristics. However, for large-scale industrial processes with high-dimension variables, treating the whole process as a single subject will degrade the representation accuracy. It may result from the following reasons: First, fault may disturb a part of variables rather than the whole process where the fault information may be buried by the unaffected variables. Second, fault characteristics may be hybrid, in which linear fault patterns and nonlinear fault patterns coexist. Therefore, an effective process decomposition mechanism is of great demand to well describe the complex fault characteristics of large-scale processes. This paper proposes a fault characteristics decomposition based probabilistic and distributed fault diagnosis method. First, process is decomposed into different subsets by evaluating fault effects from linear and nonlinear aspects. Based on the decomposition result, distributed diagnosis models are developed where different fault modeling strategies are implemented for different subsets to closely describe fault characteristics. For online application, probabilistic fault diagnosis is implemented at two levels. At the lower level, distributed diagnosis models are adopted to reveal the underlying characteristics of new sample in each subset; at the upper level, the final affiliation can be revealed by integrating the results from each subset in a probabilistic way. The effectiveness of the proposed algorithm is tested by both the numerical example and industrial processes." @default.
- W2908238436 created "2019-01-11" @default.
- W2908238436 creator A5011060290 @default.
- W2908238436 creator A5038929132 @default.
- W2908238436 date "2019-03-01" @default.
- W2908238436 modified "2023-10-03" @default.
- W2908238436 title "Hybrid fault characteristics decomposition based probabilistic distributed fault diagnosis for large-scale industrial processes" @default.
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- W2908238436 doi "https://doi.org/10.1016/j.conengprac.2018.12.009" @default.
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