Temperature Estimation in Trailer Disc Brake
(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:
http://lup.lub.lu.se/student-papers/record/7397831
- author
- Finnved, Sofia and Nöbbelin, Sebastian
- supervisor
- organization
- year
- 2015
- 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}},
}