Reference : Sensitivity calculations and variance analysis in plant measurement reconciliation
Scientific journals : Article
Engineering, computing & technology : Computer science
Engineering, computing & technology : Chemical engineering
Sensitivity calculations and variance analysis in plant measurement reconciliation
Heyen, Georges [Université de Liège - ULg > Département de chimie appliquée > LASSC (Labo d'analyse et synthèse des systèmes chimiques) >]
Marechal, Eric [Université de Liège - ULg > Chimie appliquée > LASSC > >]
Kalitventzeff, Boris [Université de Liège - ULg > Services généraux (Faculté des sciences appliquées) > Relations académiques et scientifiques (Sciences appliquées) >]
Computers & Chemical Engineering
Pergamon Press - An Imprint of Elsevier Science
Suppl. A
Yes (verified by ORBi)
United Kingdom
[en] Analysis of the results of a data reconciliation program is made easier by extracting more information from the Jacobian matrix of the constraint equations. Standard deviation for all state variables (measured or not measured) is related to the standard deviation of measurements. Distinction between variables that are actually corrected by the validation process, and those that are merely derived from a single measurement is straightforward. Based on this information, decisions can be taken : deletion of unnecessary measurements, addition of new measurement points and their optimal selection, or identification of key measurements for which any enhancement of accuracy would result in significant improvement in the quality of the process validation.

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