Data reconciliation with uncertain models

Didier Maquin (1) , Olivier Adrot (1) , José Ragot (1)

1 CRAN - Centre de Recherche en Automatique de Nancy

Data reconciliation has proven to be an e€fective technique for providing frequent, accurate and consistent "best estimates" of plant operation data. However, in almost all the proposed techniques until today, the mathematical model of the process has been considered as exact. In point of fact, this hypothesis is uncommon and frequently the models used are uncertain. This paper proposes a new technique of data reconciliation which is able to exploit the knowledge about the uncertainties of the model with regard to which the reconciliation is done. It leads to the solution of a classical quadratic optimisation problem subject to constraints. The originality of the proposed technique is to use penalty functions for solving this problem and to weight each constraint with regard to their uncertainties.

Mots clés: Data reconciliation; uncertain models; estimation techniques

Domaines: Automatique / Robotique

Didier Maquin, Olivier Adrot, José Ragot. Data reconciliation with uncertain models. ISA Transactions, 2000, 39 (1), pp.35-45. ⟨10.1016/S0019-0578(99)00045-2⟩. ⟨hal-00143980⟩