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Software sensors for biomass concentration in a SSC process using artificial neural networks and support vector machine.

Abstract：

:The lack of sensors for some relevant state variables in fermentation processes can be coped by developing appropriate software sensors. In this work, NARX-ANN, NARMAX-ANN, NARX-SVM and NARMAX-SVM models are compared when acting as software sensors of biomass concentration for a solid substrate cultivation (SSC) process. Results show that NARMAX-SVM outperforms the other models with an SMAPE index under 9 for a 20 % amplitude noise. In addition, NARMAX models perform better than NARX models under the same noise conditions because of their better predictive capabilities as they include prediction errors as inputs. In the case of perturbation of initial conditions of the autoregressive variable, NARX models exhibited better convergence capabilities. This work also confirms that a difficult to measure variable, like biomass concentration, can be estimated on-line from easy to measure variables like CO₂ and O₂ using an adequate software sensor based on computational intelligence techniques.

journal_name

Bioprocess Biosyst Eng

journal_title

Bioprocess and biosystems engineering

authors

Acuña G,Ramirez C,Curilem M

doi

10.1007/s00449-013-0925-3

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

27-36

issue

1

eissn

1615-7591

issn

1615-7605

journal_volume

37

pub_type

杂志文章

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