Journal
ISA TRANSACTIONS
Volume 139, Issue -, Pages 216-228Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.isatra.2023.04.035
Keywords
Incipient fault; Industrial processes; Stacked autoencoder; Adaptively weighting; Local fault detection; Global fault detection
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To improve the performance of incipient fault detection for large-scale nonlinear industrial processes, a decentralized adaptively weighted stacked autoencoder (DAWSAE) -based fault detection method is proposed. It divides the industrial process into sub-blocks and establishes local adaptively weighted stacked autoencoders (AWSAE) to mine local information. It then constructs local and global statistics based on adaptively weighted feature vectors and residual vectors for fault detection.
Modern industrial processes often exhibit large-scale and nonlinear characteristics. Incipient fault detection for industrial processes is a big challenge because of the faint fault signature. To improve the performance of incipient fault detection for large-scale nonlinear industrial processes, a decentralized adaptively weighted stacked autoencoder (DAWSAE) -based fault detection method is proposed. First, the industrial process is divided into several sub-blocks and local adaptively weighted stacked autoencoder (AWSAE) is established for each sub-block to mine local information and obtain local adaptively weighted feature vectors and residual vectors. Second, the global AWSAE is established for the whole process to mine global information and obtain global adaptively weighted feature vectors and residual vectors. Finally, local statistics and global statistics are constructed based on local and global adaptively weighted feature vectors and residual vectors to detect the sub-blocks and the whole process, respectively. The advantages of proposed method are verified by a numerical example and Tennessee Eastman process (TEP).
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