Modelling of selective catalytic reduction systems using discrete-time Linear Parameter Varying models
Paper in proceedings, 2014

In this work, a Linear Parameter Varying (LPV) model of the Selective Catalytic Reduction (SCR) system, used for NOx reduction placed as after-treatment systems in diesel engines is developed. The LPV model structure is formed utilising the physical properties of the system yielding only 7 unknown parameters for a third order model structure of the SCR, which is a significant reduction in number of parameters in comparison with other nonlinear models used in this paper. The states of the model however, do not possess any physical interpretation. The LPV model structure is validated using real measured data from cell tests at Scania AB with promising results. The proposed model is compared to previous global nonlinear models of the system, i.e. a nonlinear state space model and a Hammerstein-Wiener model of the system.

Linear parameter varying systems

non-linear systems

selective catalytic reduction systems

Author

soma Tayamon

Jonas Sjöberg

Chalmers, Signals and Systems, Systems and control, Mechatronics

19th IFAC World Congress on International Federation of Automatic Control, IFAC 2014, Cape Town, South Africa, 24-29 August 2014

1474-6670 (ISSN)

Vol. 19 5685-5690

Areas of Advance

Transport

Subject Categories

Control Engineering

ISBN

978-3-90282362-5

More information

Created

10/7/2017