Model-based temperature control of a diesel oxidation catalyst
Event details
| Date | 04.05.2012 |
| Hour | 10:15 › 11:15 |
| Speaker |
Dr. Y Creff, Institut Francais du Petrole - Energies Nouvelles, France. http://www.ifpenergiesnouvelles.com/ |
| Location |
ME C2 405
|
| Category | Conferences - Seminars |
The presentation deals with the control of the outlet temperature of a DOC (Diesel Oxidation Catalyst), used in diesel vehicles as a heat supplier to regenerate the particulate filters. The DOC is commonly modeled as a complex distributed parameter system, involving an energy balance and several mass balances. Such models are not suited for control purposes. It is first shown how a control model can be derived, mainly through a drastic simplification of the mass balances, and thanks to an equivalence between advection-transfer systems and advection-diffusion systems. This model correctly reproduces the outlet temperature response to changes in the input variables (the control variable -inlet hydrocarbons-, as well as the disturbances -inlet temperature and gas velocity). Then, the control approach is presented. Rejecting the inlet temperature variations is achieved by synchronization, as suggested by properties of the advection-diffusion systems. Besides, it is shown that, although the gas velocity variations cannot be totally compensated for, it is possible to limit their effect by a suited gain scheduling. Experimental results show the relevance of the proposed approach.
Practical information
- General public
- Free
Organizer
- Laboratoire d'Automatique, LA-EPFL
http://la.epfl.ch
Contact
- gregory.francois@epfl.ch