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Fysikalisk modellering av avancerad racingstötdämpare

Claesson, Jim (2012)
Department of Energy Sciences
Abstract
A shock absorber is used in road vehicles to provide comfortable driving and to optimize the grip. The characteristics are advanced and it takes powerful tools to model a shock absorber. Öhlins Racing AB in Upplands-Väsby is looking for a tool to physically describe their products; in this thesis the task is performed by using the modeling language Modelica and the simulation tool Dymola. The modeled product is named Öhlins TTR and the work takes place at Modelon in Lund. First a literature survey was made to get a glimpse in what was created previously and it showed that only a few detailed shock absorbers have been modeled. To understand the modeling work a certain understanding of both Dymola and shock absorbers in general is required.... (More)
A shock absorber is used in road vehicles to provide comfortable driving and to optimize the grip. The characteristics are advanced and it takes powerful tools to model a shock absorber. Öhlins Racing AB in Upplands-Väsby is looking for a tool to physically describe their products; in this thesis the task is performed by using the modeling language Modelica and the simulation tool Dymola. The modeled product is named Öhlins TTR and the work takes place at Modelon in Lund. First a literature survey was made to get a glimpse in what was created previously and it showed that only a few detailed shock absorbers have been modeled. To understand the modeling work a certain understanding of both Dymola and shock absorbers in general is required. Therefore this thesis gives a short introduction into how Dymola works and a technical description of the shock absorber. The model is built up by both components available in Dymola and self-made components. Valve system, cylinders, oil and other physical phenomena are built and then connected in order to simulate the complete model. Detailed descriptions will be given on how each part was modeled, the descriptions will be given both with mathematical derivations and images from Dymola. The measurements was made at Öhlins; in a flowbench to measure flow through valves and in a dynamometer (both with sinus shaped position and speed ramps) to measure the damper force. The simulation results are then compared to the measurements data and some parameters in the model are being adjusted in order to get a better match. It turned out that the model gave good results and did reflect much of the shock absorbers complex characteristics. (Less)
Please use this url to cite or link to this publication:
author
Claesson, Jim
supervisor
organization
year
type
H1 - Master's Degree (One Year)
subject
keywords
Stötdämpare modelleringsspråk Modelica simuleringsprogram Dymola
report number
5259
ISSN
0282-1990
language
Swedish
id
3054933
date added to LUP
2012-09-20 15:51:01
date last changed
2012-09-20 15:51:01
@misc{3054933,
  abstract     = {A shock absorber is used in road vehicles to provide comfortable driving and to optimize the grip. The characteristics are advanced and it takes powerful tools to model a shock absorber. Öhlins Racing AB in Upplands-Väsby is looking for a tool to physically describe their products; in this thesis the task is performed by using the modeling language Modelica and the simulation tool Dymola. The modeled product is named Öhlins TTR and the work takes place at Modelon in Lund. First a literature survey was made to get a glimpse in what was created previously and it showed that only a few detailed shock absorbers have been modeled. To understand the modeling work a certain understanding of both Dymola and shock absorbers in general is required. Therefore this thesis gives a short introduction into how Dymola works and a technical description of the shock absorber. The model is built up by both components available in Dymola and self-made components. Valve system, cylinders, oil and other physical phenomena are built and then connected in order to simulate the complete model. Detailed descriptions will be given on how each part was modeled, the descriptions will be given both with mathematical derivations and images from Dymola. The measurements was made at Öhlins; in a flowbench to measure flow through valves and in a dynamometer (both with sinus shaped position and speed ramps) to measure the damper force. The simulation results are then compared to the measurements data and some parameters in the model are being adjusted in order to get a better match. It turned out that the model gave good results and did reflect much of the shock absorbers complex characteristics.},
  author       = {Claesson, Jim},
  issn         = {0282-1990},
  keyword      = {Stötdämpare modelleringsspråk Modelica simuleringsprogram Dymola},
  language     = {swe},
  note         = {Student Paper},
  title        = {Fysikalisk modellering av avancerad racingstötdämpare},
  year         = {2012},
}