期刊
SENSORS
卷 20, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/s20030695
关键词
soft sensor; deep learning; semi-supervised learning; robust estimator; ensemble strategy; rubber mixing process; Mooney viscosity
资金
- National Natural Science Foundation of China [61873241, 51476144, 61603369]
- Zhejiang Provincial Natural Science Foundation of China [LY18F030024]
Although several data-driven soft sensors are available, online reliable prediction of the Mooney viscosity in industrial rubber mixing processes is still a challenging task. A robust semi-supervised soft sensor, called ensemble deep correntropy kernel regression (EDCKR), is proposed. It integrates the ensemble strategy, deep brief network (DBN), and correntropy kernel regression (CKR) into a unified soft sensing framework. The multilevel DBN-based unsupervised learning stage extracts useful information from all secondary variables. Sequentially, a supervised CKR model is built to explore the relationship between the extracted features and the Mooney viscosity values. Without cumbersome preprocessing steps, the negative effects of outliers are reduced using the CKR-based robust nonlinear estimator. With the help of ensemble strategy, more reliable prediction results are further obtained. An industrial case validates the practicality and reliability of EDCKR.
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