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Evaluation of Communication Interfaces for ElectronicControl Units in Heavy-duty Vehicles
Linköpings universitet, Institutionen för systemteknik, Fordonssystem. Linköpings universitet, Tekniska högskolan.
2012 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgaveAlternativ tittel
Utvärdering av kommunikationsgränssnitt för styrenheter i tunga fordon (svensk)
Abstract [en]

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.

sted, utgiver, år, opplag, sider
2012. , s. 72
Emneord [en]
Embedded systems, automotive
Emneord [sv]
Inbyggda system, fordon
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-78869ISRN: LiTH-ISY-EX--12/4580--SEOAI: oai:DiVA.org:liu-78869DiVA, id: diva2:536301
Eksternt samarbeid
Scania CV AB
Fag / kurs
Vehicular Systems
Presentation
2012-06-15, Algoritmen, Linköping, 14:53 (svensk)
Uppsök
Technology
Veileder
Examiner
Tilgjengelig fra: 2012-06-25 Laget: 2012-06-21 Sist oppdatert: 2012-06-25bibliografisk kontrollert

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