A Real-Time Implementable NMPC Output Feedback for a Diesel Engine Air Path

Abstract

Résumé -Commande prédictive non linéaire avec retour de sortie implémentable en tempsréel pour un circuit d'air d'un moteur Diesel -Dans cet article, une validation expérimentale d'un schéma de commande prédictive non linéaire (CPNL) paramétrique avec un observateur à horizon glissant a été proposé pour le circuit d'air d'un moteur Diesel. La stratégie de commande basée sur l'approche paramétrique à faible dimension s'est montrée implémentable en temps réel et peut être utilisée aussi en tant qu'une solution du type boîte noire indépendamment de la structure du modèle non linéaire. Abstract

Identification of a class of nonlinear dynamic relationships: Application to the identification of engine emission models

“…It is obvious, however, that the nonlinear nature of the model makes particularly appealing nonlinear model predictive control (NMPC) approach that uses the system model as well as the cost function as simple black boxes through structure-free real-time optimization schemes. Such a framework has precisely been proposed in Murilo et al 6 and can therefore be readily investigated. Finally, the validation part of this study can be enforced using additional experiments as a validation set.…”

“…1–4 A typical framework that is commonly used is to control the boost pressure and the fresh air mass flow by manipulating the exhaust gas recirculation (EGR) valve and the guide vane position of the variable geometry turbocharger (VGT). 5–7 Such approaches, based on intermediate variable feedback control, had been used satisfactorily over the past decades. However, the presumed correlations between the reference trajectories on the intermediate variables from one side and the emission level on the other side are only valid on rather restricted operational domains that especially concern steady-state regimes.…”