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Computer-Aided Optimization of Trim Parameters for Slip Control Systems
2005 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

A thing that continues to be of increasing importance for the automotive industry is safety. Safety in cars can consist of many different things such as seat belts, air bags and brakes. A world leading company in this area is TRW Automotive. Anti lock Braking System, ABS, Traction Control, TC, and Vehicle Stability Control, VSC, are examples of active safety systems, and they are members of TRW’s Slip Control Systems family, SCS. These are complex systems that monitor the behavior of the vehicle at all times to determine if the driver has control over the vehicle. The brain behind these systems is the Electronic Control Unit, ECU. Within the ECU there is a microcontroller that uses different sensors to collect information to determine when the driver needs assistance to regain control over the vehicle. This assistance is provided in the form of brake interventions on any of the four wheels and drive torque regulation on the driven wheels. The final step in the development work is to optimize or trim the parameters in the software of the ECU to make it fit the customer’s requirements for their different products. As these systems evolves the software get’s more complex, and the number of trim parameters increases as well. With an increasing number of trims that change between the different software generations a problem occurs. The large amount of trim parameters, and the fact that they can be used at multiple locations in the code, makes it difficult for the trimming engineer to get an overlook of the resulting effects of a trim parameter change. The goal of the work described in this report has been to evaluate these trims and try to determine how they are used to see if a tool that will assist the engineers working with the trims can be developed. The result that is described in this report consists of a computer-aided tool that is meant to assist engineers working with car trimming and provide a system for documentation for the trimming changes. Conclusions that can be drawn is that many of the trims are never changed throughout the work, and if there would exist some sort of secure and uniform documentation system that the trimmers could use during their work, time would be saved.

Place, publisher, year, edition, pages
2005.
Keyword [en]
Technology, ABS
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-41923ISRN: LTU-EX--05/145--SELocal ID: 000e1b91-6ea5-4ba5-9c5e-aac7bea8415cOAI: oai:DiVA.org:ltu-41923DiVA: diva2:1015138
Subject / course
Student thesis, at least 30 credits
Educational program
Mechanical Engineering, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
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