Gaussian Discriminative Analysis aided GAN for imbalanced big data augmentation and fault classification. (August 2020)

• Record Type: Journal Article
• Authors: Zhuo, Yue; Ge, Zhiqiang
• Is Part Of: Journal of process control. Volume 92(2020)
• Page Start: 271
• Page End: 287
• Publication Date: 2020-08
• Subjects: GAN -- GDA -- Imbalanced data -- Minority class -- Fault classification -- Big data; Process control -- Periodicals; Fabrication -- Contrôle -- Périodiques; Process control; Periodicals; Electronic journals; 660.281
• DOI: 10.1016/j.jprocont.2020.06.014
• Languages: English
• ISSNs: 0959-1524

Abstract

Abstract: With data in industrial processes being larger in scale and easier to access, data-driven technologies have become more prevalent in process monitoring. Fault classification is an indispensable part of process monitoring, while machine learning is an effective tool for fault classification. In most practical cases, however, the number of fault data is far smaller than normal data, and this imbalance of dataset would lead to the significant decline in performance of common classifier learning algorithms. To this issue, we propose a data augmentation method, which is based on Generative Adversarial Networks(GAN) and aided by Gaussian Discriminant Analysis(GDA), for enhancement of fault classification accuracy. To validate the effectiveness of this method for imbalanced fault classification, on toy data and the Tennessee Eastman (TE) benchmark process, common oversampling method and the basic GAN are compared to our method, with different classification algorithms. Besides, proposed method is deployed and parallelly trained on Tensorflow platform, which is suitable for applications like data augmentation and imbalanced fault classification in industrial big data environments. Highlights: A data augmentation method for imbalanced fault classification. Generative Adversarial Networks aided by Gaussian Discriminant Analysis. Superiorities of the model are analyzed and discussed in detail. Parallel implementation of the model for big data in Tensorflow. The performance of the method is verified on both toy data and TE process.