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Tire/road friction estimation for front wheel driven vehicle

Johansson, Simon and Persson, Viking (2015)
Department of Automatic Control
Abstract
Vehicles of today are equipped with several driving enhancing systems. The Electronic Stability Program (ESP) controls the brakes of the vehicle to prevent undesirable vehicle behavior. The Anti-lock Braking System (ABS) prevents the wheels to lock up while
braking hard. Many vehicles are also equipped with advanced All Wheel Drive (AWD) systems or Limited Slip Differentials (LSD) allowing for the drive torque to be almost freely distributed among the wheels. Knowing the coefficient of friction to the road is
extremely beneficial for all of these systems, especially for the AWD and LSD systems to be able to optimize the control.
In this master thesis a method for estimating the tire/road friction coefficient will be developed. Focus... (More)
Vehicles of today are equipped with several driving enhancing systems. The Electronic Stability Program (ESP) controls the brakes of the vehicle to prevent undesirable vehicle behavior. The Anti-lock Braking System (ABS) prevents the wheels to lock up while
braking hard. Many vehicles are also equipped with advanced All Wheel Drive (AWD) systems or Limited Slip Differentials (LSD) allowing for the drive torque to be almost freely distributed among the wheels. Knowing the coefficient of friction to the road is
extremely beneficial for all of these systems, especially for the AWD and LSD systems to be able to optimize the control.
In this master thesis a method for estimating the tire/road friction coefficient will be developed. Focus will be put on Front Wheel Driven (FWD) vehicles equipped with an electronic Limited Slip Differential (eLSD). The eLSD in question is a newly launched
product by BorgWarner AB called FXD (Front Cross Differential). This is an eLSD based on their well known fifth generation electro hydraulic clutch. Today it’s controlled by a complex control algorithm to be able to handle several driving situations. It’s desirable to know the tire/road friction coefficient to improve the control algorithm further. This is especially important when estimating the torque transfer through the differential. (Less)
Please use this url to cite or link to this publication:
author
Johansson, Simon and Persson, Viking
supervisor
organization
year
type
H3 - Professional qualifications (4 Years - )
subject
ISSN
0280-5316
other publication id
ISRN LUTFD2/TFRT--5985--SE
language
English
id
7756380
date added to LUP
2015-08-10 09:21:38
date last changed
2015-08-10 09:21:38
@misc{7756380,
  abstract     = {Vehicles of today are equipped with several driving enhancing systems. The Electronic Stability Program (ESP) controls the brakes of the vehicle to prevent undesirable vehicle behavior. The Anti-lock Braking System (ABS) prevents the wheels to lock up while
braking hard. Many vehicles are also equipped with advanced All Wheel Drive (AWD) systems or Limited Slip Differentials (LSD) allowing for the drive torque to be almost freely distributed among the wheels. Knowing the coefficient of friction to the road is
extremely beneficial for all of these systems, especially for the AWD and LSD systems to be able to optimize the control.
 In this master thesis a method for estimating the tire/road friction coefficient will be developed. Focus will be put on Front Wheel Driven (FWD) vehicles equipped with an electronic Limited Slip Differential (eLSD). The eLSD in question is a newly launched
product by BorgWarner AB called FXD (Front Cross Differential). This is an eLSD based on their well known fifth generation electro hydraulic clutch. Today it’s controlled by a complex control algorithm to be able to handle several driving situations. It’s desirable to know the tire/road friction coefficient to improve the control algorithm further. This is especially important when estimating the torque transfer through the differential.},
  author       = {Johansson, Simon and Persson, Viking},
  issn         = {0280-5316},
  language     = {eng},
  note         = {Student Paper},
  title        = {Tire/road friction estimation for front wheel driven vehicle},
  year         = {2015},
}