A Bayesian approach to robust process identification with ARX models
| Autor: | Biao Huang, Shima Khatibisepehr |
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| Rok vydání: | 2012 |
| Předmět: |
Hyperparameter
Engineering Environmental Engineering Estimation theory business.industry General Chemical Engineering Bayesian probability computer.software_genre Bayesian inference Robustness (computer science) Outlier Prior probability Maximum a posteriori estimation Data mining business computer Biotechnology |
| Zdroj: | AIChE Journal. 59:845-859 |
| ISSN: | 0001-1541 |
| DOI: | 10.1002/aic.13887 |
| Popis: | In the context of process industries, outlying observations mostly represent a large random error resulting from irregular process disturbances, instrument failures, or transmission problems. Statistical analysis of process data contaminated with outliers may lead to biased parameter estimation and plant-model mismatch. The problem of process identification in the presence of outliers has received great attention and a wide variety of outlier identification approaches have been proposed. However, there is a great need to seek for more general solutions and a robust framework to deal with different types of outliers. The main objective of this work is to formulate and solve the robust process identification problem under a Bayesian framework. The proposed solution strategy not only yields maximum a posteriori estimates of model parameters but also provides hyperparameters that determine data quality as well as prior distribution of model parameters. Identification of a simulated continuous fermentation reactor is considered to show the effectiveness and robustness of the proposed Bayesian framework. The advantages of the method are further illustrated through an experimental case study of a pilot-scale continuous stirred tank heater. © 2012 American Institute of Chemical Engineers AIChE J, 59: 845–859, 2013 |
| Databáze: | OpenAIRE |
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