Evaluation of Communication Interfaces for ElectronicControl Units in Heavy-duty Vehicles

The number of electronic control units in heavy-duty vehicles has grown dramatically overthe last few decades. This has led to the use of communication buses to reduce the complexityand weight of the networks. There are reasons to believe that the de facto standardcommunication interface in the auto...

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Main Author: Johansson, Henrik
Format: Others
Language:English
Published: Linköpings universitet, Fordonssystem 2012
Subjects:
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-78869
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spelling ndltd-UPSALLA1-oai-DiVA.org-liu-788692013-01-08T13:52:09ZEvaluation of Communication Interfaces for ElectronicControl Units in Heavy-duty VehiclesengUtvärdering av kommunikationsgränssnitt för styrenheter i tunga fordonJohansson, HenrikLinköpings universitet, FordonssystemLinköpings universitet, Tekniska högskolan2012Embedded systemsautomotiveInbyggda systemfordonThe number of electronic control units in heavy-duty vehicles has grown dramatically overthe last few decades. This has led to the use of communication buses to reduce the complexityand weight of the networks. There are reasons to believe that the de facto standardcommunication interface in the automotive industry, the Controller Area Network, is obsoletein some areas. Hence an evaluation of available communication interfaces is needed.This study focuses on lower levels of the Open Systems Interconnect (osi) model. Initially atheoretical study is presented in order to give an overview of automotive embedded systemsin general and different communication interfaces in particular. Ethernet and FlexRay areidentified as two interfaces of interest for future use in Scanias vehicles. The former is new inautomotive applications but is believed to become popular over the years to come. A possibleuse of this interface could be as a backbone to take the load off other interfaces. The use ofFlexRay in Scanias vehicles is limited because of the modular system used and the staticscheduling needed. It could however be used between mandatory ecus where the nodes andthe messages are all known beforehand.The report also contains the result from emission measurements on a number of interfacesperformed using a stripline antenna in a shielded enclosure. Strong conclusions can not bedrawn since it’s hard to tell what the transceivers, circuit boards and interfaces contributedto in the spectra with the method used. The FlexRay hardware is worse than for the otherinterfaces. Similarities can be seen between low-speed and high-speed can but it could becharacteristics of the transceivers used rather than the interface itself. Student thesisinfo:eu-repo/semantics/bachelorThesistexthttp://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-78869application/pdfinfo:eu-repo/semantics/openAccess
collection NDLTD
language English
format Others
sources NDLTD
topic Embedded systems
automotive
Inbyggda system
fordon
spellingShingle Embedded systems
automotive
Inbyggda system
fordon
Johansson, Henrik
Evaluation of Communication Interfaces for ElectronicControl Units in Heavy-duty Vehicles
description The number of electronic control units in heavy-duty vehicles has grown dramatically overthe last few decades. This has led to the use of communication buses to reduce the complexityand weight of the networks. There are reasons to believe that the de facto standardcommunication interface in the automotive industry, the Controller Area Network, is obsoletein some areas. Hence an evaluation of available communication interfaces is needed.This study focuses on lower levels of the Open Systems Interconnect (osi) model. Initially atheoretical study is presented in order to give an overview of automotive embedded systemsin general and different communication interfaces in particular. Ethernet and FlexRay areidentified as two interfaces of interest for future use in Scanias vehicles. The former is new inautomotive applications but is believed to become popular over the years to come. A possibleuse of this interface could be as a backbone to take the load off other interfaces. The use ofFlexRay in Scanias vehicles is limited because of the modular system used and the staticscheduling needed. It could however be used between mandatory ecus where the nodes andthe messages are all known beforehand.The report also contains the result from emission measurements on a number of interfacesperformed using a stripline antenna in a shielded enclosure. Strong conclusions can not bedrawn since it’s hard to tell what the transceivers, circuit boards and interfaces contributedto in the spectra with the method used. The FlexRay hardware is worse than for the otherinterfaces. Similarities can be seen between low-speed and high-speed can but it could becharacteristics of the transceivers used rather than the interface itself.
author Johansson, Henrik
author_facet Johansson, Henrik
author_sort Johansson, Henrik
title Evaluation of Communication Interfaces for ElectronicControl Units in Heavy-duty Vehicles
title_short Evaluation of Communication Interfaces for ElectronicControl Units in Heavy-duty Vehicles
title_full Evaluation of Communication Interfaces for ElectronicControl Units in Heavy-duty Vehicles
title_fullStr Evaluation of Communication Interfaces for ElectronicControl Units in Heavy-duty Vehicles
title_full_unstemmed Evaluation of Communication Interfaces for ElectronicControl Units in Heavy-duty Vehicles
title_sort evaluation of communication interfaces for electroniccontrol units in heavy-duty vehicles
publisher Linköpings universitet, Fordonssystem
publishDate 2012
url http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-78869
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