Adaptive Catalyst Model for Control
This master's thesis describes the development of a model of
the catalystsystem aiming at control by an MPC. A
well functioning model, which is suitable in control purpose, is
important while emission legislation become more and more hard to
fulfill for the car manufacturers. Much research has been done in the
field of physical modeling of the system, but in this work a linear
adaptive time discrete ARX-model is developed and validated. The systems tendency to
change its dynamic during usage implies that the model must be adaptive.
The developed model proved to be well functioning and shows promising
conditions for the MPC design.
The system and the model are analyzed in the time- and frequency domains
and the model is both implemented and validated in a Saab 9-5.
The work has been performed both at Saab Automobile Powertrain AB in
Södertälje and in Vehicular Systems Dept. of Electrical Engineering at
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Last updated: 2021-11-10