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Temperature Estimation in Trailer Disc Brake

Finnved, Sofia and Nöbbelin, Sebastian (2015)
Department of Automatic Control
Abstract
Automatic brake functions in trucks and cars can save lives but may heat the brakes to dangerous temperature levels. Various types of models for temperature estimation in a disc brake have been evaluated. A homogeneous temperature inside the disc was assumed and this simplification gave adequate modeling results. The implementation was done in Simulink.
One model estimated the heat generation based on the kinetic energy difference during a brake event. The difficulty of estimating driving resistance coefficients and the sensitivity to the driver’s behavior made this model less suitable for generalization. More promising models used the brake cylinder pressure as input. The brake cylinder pressure was used to derive a braking force at the... (More)
Automatic brake functions in trucks and cars can save lives but may heat the brakes to dangerous temperature levels. Various types of models for temperature estimation in a disc brake have been evaluated. A homogeneous temperature inside the disc was assumed and this simplification gave adequate modeling results. The implementation was done in Simulink.
One model estimated the heat generation based on the kinetic energy difference during a brake event. The difficulty of estimating driving resistance coefficients and the sensitivity to the driver’s behavior made this model less suitable for generalization. More promising models used the brake cylinder pressure as input. The brake cylinder pressure was used to derive a braking force at the periphery of each wheel. The braking force could be determined in different ways, each one with their own advantages and disadvantages. The common disadvantage was that the brake force depends on the load over each wheel. It was assumed that the load over each wheel be known. A simple, exponential model for cooling gave sufficiently good results. A model based on the sum of convection and radiation gave better results.
The brake pressure model was used in a short study on steady state temperatures, while the vehicle was pulse braked. No conclusions was drawn from these simulations, but the results were promising, thus opening up for future research. (Less)
Please use this url to cite or link to this publication:
author
Finnved, Sofia and Nöbbelin, Sebastian
supervisor
organization
year
type
H3 - Professional qualifications (4 Years - )
subject
ISSN
0280-5316
other publication id
ISRN LUTFD2/TFRT--5966--SE
language
English
id
7397831
date added to LUP
2015-06-26 13:03:02
date last changed
2015-06-26 13:03:02
@misc{7397831,
  abstract     = {Automatic brake functions in trucks and cars can save lives but may heat the brakes to dangerous temperature levels. Various types of models for temperature estimation in a disc brake have been evaluated. A homogeneous temperature inside the disc was assumed and this simplification gave adequate modeling results. The implementation was done in Simulink.
 One model estimated the heat generation based on the kinetic energy difference during a brake event. The difficulty of estimating driving resistance coefficients and the sensitivity to the driver’s behavior made this model less suitable for generalization. More promising models used the brake cylinder pressure as input. The brake cylinder pressure was used to derive a braking force at the periphery of each wheel. The braking force could be determined in different ways, each one with their own advantages and disadvantages. The common disadvantage was that the brake force depends on the load over each wheel. It was assumed that the load over each wheel be known. A simple, exponential model for cooling gave sufficiently good results. A model based on the sum of convection and radiation gave better results.
 The brake pressure model was used in a short study on steady state temperatures, while the vehicle was pulse braked. No conclusions was drawn from these simulations, but the results were promising, thus opening up for future research.},
  author       = {Finnved, Sofia and Nöbbelin, Sebastian},
  issn         = {0280-5316},
  language     = {eng},
  note         = {Student Paper},
  title        = {Temperature Estimation in Trailer Disc Brake},
  year         = {2015},
}