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On Modeling and Nonlinear Model Reduction in Automotive Systems

Nilsson, Oskar LU (2009) In PhD Thesis TFRT-1085
Abstract
The current control design development process in automotive industry and elsewhere involves many expensive experiments and hand-tuning of control parameters. Model based control design is a promising approach to reduce costs and development time. In this process low complexity models are essential and model reduction methods are very useful tools. This thesis combines the areas of modeling and model reduction with applications in automotive systems. A model reduction case study is performed on an engine air path. The heuristic method commonly used when modeling engine dynamics is compared with a more systematic approach based on the balanced truncation method.

The main contribution of this thesis is a method for model reduction... (More)
The current control design development process in automotive industry and elsewhere involves many expensive experiments and hand-tuning of control parameters. Model based control design is a promising approach to reduce costs and development time. In this process low complexity models are essential and model reduction methods are very useful tools. This thesis combines the areas of modeling and model reduction with applications in automotive systems. A model reduction case study is performed on an engine air path. The heuristic method commonly used when modeling engine dynamics is compared with a more systematic approach based on the balanced truncation method.

The main contribution of this thesis is a method for model reduction of nonlinear systems. The procedure is focused on reducing the number of states using information obtained by linearization around trajectories. The methodology is closely tied to existing theory on error bounds and good results are shown in form of examples such as a controller used in real-world cars. Also, a model of the exhaust gas oxygen sensor, used for air-fuel ratio control in automotive spark-ignition engines, is developed and successfully validated. (Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • Professor Scherpen, Jacquelien, Faculty of Mathematics and Natural Sciences, University of Groningen, the Netherlands
organization
publishing date
type
Thesis
publication status
published
subject
keywords
nonlinear systems, model reduction, discrete-time, continuous-time
in
PhD Thesis TFRT-1085
pages
101 pages
publisher
Department of Automatic Control, Lund Institute of Technology, Lund University
defense location
Lundmarksalen, Astronomihuset, Sölvegatan 27, Lund University, Faculty of Engineering
defense date
2009-03-06 10:15:00
ISSN
0280-5316
0280-5316
language
English
LU publication?
yes
id
3738ce58-0ff4-4e29-b0ef-41c41be6a397 (old id 1292877)
date added to LUP
2016-04-01 14:41:28
date last changed
2019-05-23 16:01:19
@phdthesis{3738ce58-0ff4-4e29-b0ef-41c41be6a397,
  abstract     = {The current control design development process in automotive industry and elsewhere involves many expensive experiments and hand-tuning of control parameters. Model based control design is a promising approach to reduce costs and development time. In this process low complexity models are essential and model reduction methods are very useful tools. This thesis combines the areas of modeling and model reduction with applications in automotive systems. A model reduction case study is performed on an engine air path. The heuristic method commonly used when modeling engine dynamics is compared with a more systematic approach based on the balanced truncation method.<br/><br/>The main contribution of this thesis is a method for model reduction of nonlinear systems. The procedure is focused on reducing the number of states using information obtained by linearization around trajectories. The methodology is closely tied to existing theory on error bounds and good results are shown in form of examples such as a controller used in real-world cars.  Also, a model of the exhaust gas oxygen sensor, used for air-fuel ratio control in automotive spark-ignition engines, is developed and successfully validated.},
  author       = {Nilsson, Oskar},
  issn         = {0280-5316},
  language     = {eng},
  publisher    = {Department of Automatic Control, Lund Institute of Technology, Lund University},
  school       = {Lund University},
  series       = {PhD Thesis TFRT-1085},
  title        = {On Modeling and Nonlinear Model Reduction in Automotive Systems},
  url          = {https://lup.lub.lu.se/search/files/4113053/1292878.pdf},
  year         = {2009},
}