Reduced Model of Engine Air Path System Using a LPV Approach
Résumé
This paper describes a reduced model of an engine air path composed of a supercharger with throttle valve. This "industry-oriented" model is intended for control purposes. The air-path system dynamics are governed by the Saint-Venant equations, difficult to handle in control synthesis due to nonlinear properties (states -control inputs coupling, nonlinear functions). To take account the intrinsic nonlinear properties of the air-path model in control purpose, a Linear Parameter Varing (LPV) state space representation is proposed. The model is simplified considering that slow dynamics are constant, allowing to reduce the number of time varying parameters, and, therefore, the calibration time for control synthesis. The reduced LPV model is compared with the nonlinear one, and validated on air path benchmark data, showing that the model is representative enough of the system, and suitable for advanced and robust controller synthesis.
Domaines
Automatique / Robotique
Origine : Fichiers produits par l'(les) auteur(s)
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