Model-based control system design in a urea-SCR aftertreatment system based on NH3 sensor feedback
Document Type
Article
Publication Date
12-1-2009
Department
Department of Mechanical Engineering-Engineering Mechanics
Abstract
This paper presents preliminary control system simulation results in a urea-selective catalytic reduction (SCR) aftertreatment system based on NH 3 sensor feedback. A four-state control-oriented lumped parameter model is used to analyze the controllability and observability properties of the urea-SCR plant. A model-based estimator is designed via simulation and a control system is developed with design based on a sliding mode control framework. The control system based on NH3 sensor feedback is analyzed via simulation by comparing it to a control system developed based on NOX sensor feedback. Simulation results show that the NH3 sensor-based strategy performs very similarly in comparison to a NOX sensor-based strategy. The control system performance metrics for NOX index, urea index, urea usage, and NH3 slip suggest that the NO X sensor can be a potential alternative to a NOX sensor for urea-SCR control applications.
Publication Title
International Journal of Automotive Technology
Recommended Citation
Devarakonda, M.,
Parker, G.,
Johnson, J.,
&
Strots, V.
(2009).
Model-based control system design in a urea-SCR aftertreatment system based on NH3 sensor feedback.
International Journal of Automotive Technology,
10(6), 653-662.
http://doi.org/10.1007/s12239-009-0077-2
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2413
Publisher's Statement
Copyright © 2009 KSAE. Publisher’s version of record: https://doi.org/10.1007/s12239-009-0077-2