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Wisdom of Crowds for Intelligent Monitoring of Vehicle Fleets
Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).ORCID-id: 0000-0001-5163-2997
Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
Volvo Group Trucks Technology, Göteborg, Sweden.ORCID-id: 0000-0001-8255-1276
Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).ORCID-id: 0000-0002-7796-5201
Visa övriga samt affilieringar
(Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
Abstract [en]

An approach is presented and experimentally demonstrated where consensus among distributed self-organized agents is used for intelligent monitoring of mobile cyberphysical systems (in this case vehicles). The demonstration is done on test data from a 30 month long field test with a city bus fleet under real operating conditions. The self-organized models operate on-board the systems, like embedded agents, communicate their states over a wireless communication link, and their states are compared off-line to find systems that deviate from the consensus. In this way is the group (the fleet) of systems used to detect errors that actually occur. This can be used to build up a knowledge base that can be accumulated over the life-time of the systems.

Nyckelord [en]
Fault diagnosis, learning systems, mechatronics, self-monitoring, intelligent transportation systems
Nationell ämneskategori
Signalbehandling
Identifikatorer
URN: urn:nbn:se:hh:diva-27970OAI: oai:DiVA.org:hh-27970DiVA, id: diva2:794271
Forskningsfinansiär
VINNOVAVetenskapsrådetTillgänglig från: 2015-03-10 Skapad: 2015-03-10 Senast uppdaterad: 2018-03-22Bibliografiskt granskad
Ingår i avhandling
1. Machine learning methods for vehicle predictive maintenance using off-board and on-board data
Öppna denna publikation i ny flik eller fönster >>Machine learning methods for vehicle predictive maintenance using off-board and on-board data
2014 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Vehicle uptime is getting increasingly important as the transport solutions become more complex and the transport industry seeks new ways of being competitive. Traditional Fleet Management Systems are gradually extended with new features to improve reliability, such as better maintenance planning. Typical diagnostic and predictive maintenance methods require extensive experimentation and modelling during development. This is unfeasible if the complete vehicle is addressed as it would require too much engineering resources.

This thesis investigates unsupervised and supervised methods for predicting vehicle maintenance. The methods are data driven and use extensive amounts of data, either streamed, on-board data or historic and aggregated data from off-board databases. The methods rely on a telematics gateway that enables vehicles to communicate with a back-office system. Data representations, either aggregations or models, are sent wirelessly to an off-board system which analyses the data for deviations. These are later associated to the repair history and form a knowledge base that can be used to predict upcoming failures on other vehicles that show the same deviations.

The thesis further investigates different ways of doing data representations and deviation detection. The first one presented, COSMO, is an unsupervised and self-organised approach demonstrated on a fleet of city buses. It automatically comes up with the most interesting on-board data representations and uses a consensus based approach to isolate the deviating vehicle. The second approach outlined is a super-vised classification based on earlier collected and aggregated vehicle statistics in which the repair history is used to label the usage statistics. A classifier is trained to learn patterns in the usage data that precede specific repairs and thus can be used to predict vehicle maintenance. This method is demonstrated for failures of the vehicle air compressor and based on AB Volvo’s database of vehicle usage statistics.

Ort, förlag, år, upplaga, sidor
Halmstad: Halmstad University Press, 2014. s. 96
Serie
Halmstad University Dissertations ; 9
Nationell ämneskategori
Signalbehandling
Identifikatorer
urn:nbn:se:hh:diva-27869 (URN)978-91-87045-18-9 (ISBN)978-91-87045-17-2 (ISBN)
Presentation
2014-09-26, Haldasalen, Visionen, Halmstad University, Halmstad, 10:00 (Engelska)
Opponent
Handledare
Forskningsfinansiär
VINNOVA
Tillgänglig från: 2015-03-12 Skapad: 2015-02-19 Senast uppdaterad: 2015-03-17Bibliografiskt granskad

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Rögnvaldsson, ThorsteinnByttner, StefanPrytz, RuneNowaczyk, SławomirSvensson, Magnus

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Rögnvaldsson, ThorsteinnByttner, StefanPrytz, RuneNowaczyk, SławomirSvensson, Magnus
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