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Topics in Modeling, Control, and Implementation in Automotive Systems

Gäfvert, Magnus LU (2003) In PhD Thesis TFRT-1066
Abstract
This thesis treats different aspects of automotive control-systems and consists of four papers covering different areas in this large field.



The first paper presents a 9-degrees-of-freedom dynamic model of a tractor-semitrailer vehicle, aimed at simulation and evaluation of active chassis-systems for stability enhancements. Special focus is put on inclusion of the dynamics of load transfer, which are of importance in active yaw-control and roll-over prevention.



The second paper presents a new easy-to-use semi-empirical tire model for combined-slip conditions. The model is based on combining the standard rigid-carcass brush model with available empirical pure-slip models. A new method is presented for... (More)
This thesis treats different aspects of automotive control-systems and consists of four papers covering different areas in this large field.



The first paper presents a 9-degrees-of-freedom dynamic model of a tractor-semitrailer vehicle, aimed at simulation and evaluation of active chassis-systems for stability enhancements. Special focus is put on inclusion of the dynamics of load transfer, which are of importance in active yaw-control and roll-over prevention.



The second paper presents a new easy-to-use semi-empirical tire model for combined-slip conditions. The model is based on combining the standard rigid-carcass brush model with available empirical pure-slip models. A new method is presented for partitioning empirical pure-slip forces into components of sliding and adhesive forces.



The third paper regards control of gasoline direct injection engines. Strategies based on feedback of the effective torque are shown to relax the requirements of accurate engine maps, in simulations. It is exemplified that extremum control may be used for realtime optimization of the engine operation with respect to fuel consumption. A new control structure that combines the extremum controller with disturbance rejection is used to render the probing signals invisible in the engine output.



The fourth paper presents a new method to limit the effects of transient faults that occurs in hardware hosting implementations of feedback controllers. The idea is to introduce artificial signal limits that are based on closed-loop signal bounds, and combine them with an anti-windup scheme. (Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • Professor Alleyne, Andrew, M&IE Dept and Coordinated Science Lab, University of Illinois at Urbana Champaign, IL, USA
organization
publishing date
type
Thesis
publication status
published
subject
keywords
reglerteknik, Automation, robotics, robotteknik, Automatiska system, control engineering
in
PhD Thesis TFRT-1066
pages
190 pages
publisher
Department of Automatic Control, Lund Institute of Technology, Lund University
defense location
Room M:A, the M-building, Lund Institute of Technology
defense date
2003-05-09 10:15:00
ISSN
0280-5316
0280-5316
language
English
LU publication?
yes
additional info
Article: Paper 1Gäfvert, M. and O. Lindgärde, "A 9-DOF Tractor-Semitrailer Dynamic Handling Model for Advanced Chassis Control Studies", Vehicle System Dynamics, Accepted for publication, 2003. Article: Paper 2Gäfvert, M. and J. Svendenius, "A Novel Semi-Empirical Tire Model for Combined Slips", Submitted for journal publication, 2003. Article: Paper 3Gäfvert, M., K.-E. Årzen, L. M. Pedersen, and B. Bernhardsson, "Control Of GDI Engines using Torque Feedback Exemplified by Simulations", Control Engineering Practice, Accepted for publication, 2003. Article: Paper 4Gäfvert, M., B. Wittenmark, and Ö. Askerdal, "On the Effect of Transient Data-Errors in Controller Implementations", American Control Conference, Denver, Colorado, Accepted for publication, 2003.
id
374a67b0-cc67-4695-8d6d-8667eec172b1 (old id 465799)
date added to LUP
2016-04-01 16:59:39
date last changed
2019-05-23 15:52:04
@phdthesis{374a67b0-cc67-4695-8d6d-8667eec172b1,
  abstract     = {This thesis treats different aspects of automotive control-systems and consists of four papers covering different areas in this large field.<br/><br>
<br/><br>
The first paper presents a 9-degrees-of-freedom dynamic model of a tractor-semitrailer vehicle, aimed at simulation and evaluation of active chassis-systems for stability enhancements. Special focus is put on inclusion of the dynamics of load transfer, which are of importance in active yaw-control and roll-over prevention.<br/><br>
<br/><br>
The second paper presents a new easy-to-use semi-empirical tire model for combined-slip conditions. The model is based on combining the standard rigid-carcass brush model with available empirical pure-slip models. A new method is presented for partitioning empirical pure-slip forces into components of sliding and adhesive forces.<br/><br>
<br/><br>
The third paper regards control of gasoline direct injection engines. Strategies based on feedback of the effective torque are shown to relax the requirements of accurate engine maps, in simulations. It is exemplified that extremum control may be used for realtime optimization of the engine operation with respect to fuel consumption. A new control structure that combines the extremum controller with disturbance rejection is used to render the probing signals invisible in the engine output.<br/><br>
<br/><br>
The fourth paper presents a new method to limit the effects of transient faults that occurs in hardware hosting implementations of feedback controllers. The idea is to introduce artificial signal limits that are based on closed-loop signal bounds, and combine them with an anti-windup scheme.},
  author       = {Gäfvert, Magnus},
  issn         = {0280-5316},
  language     = {eng},
  publisher    = {Department of Automatic Control, Lund Institute of Technology, Lund University},
  school       = {Lund University},
  series       = {PhD Thesis TFRT-1066},
  title        = {Topics in Modeling, Control, and Implementation in Automotive Systems},
  url          = {https://lup.lub.lu.se/search/ws/files/4840790/8571803.pdf},
  year         = {2003},
}