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Implementing and studying the effects of a roll stability system in heavy vehicles using a moving simulator
Linköping University, Department of Electrical Engineering, Vehicular Systems.
2010 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesisAlternative title
Implementering samt undersökning av nyttoeffekter av ett rollstabiliseringssystem hos tunga fordon i en rörelsesimulator (Swedish)
Abstract [en]

This thesis presents the making and the implementation of a roll stability system for a simulator truck. The purpose of the system is to prevent rollover. The making of the system consists of three parts; calculating the roll angle, calculating a rollover index and constructing the control system. The roll angle was calculated using a one degree of freedom model of the truck with the measured lateral acceleration as input signal. Using the roll angle and the roll rate, a rollover index was calculated. The controller made the truck brake to avoid the impending rollover when the rollover index was at a critical point. The benefits of the system were measured by conducting a study in which test persons drove the simulator truck both with the stability system switched on and switched off. The scenario in the study was carefully constructed so that it would test the system thoroughly. The results were not unambiguous, in some situations the roll stability system prevented roll over, but in others it had the opposite effect.

Abstract [sv]

I den här examensarbetesrapporten presenteras ett rollstabiliseringssystem för tunga fordon framtaget på VTIs (Statens väg- och transportforskningsinstitut) begäran. Systemet ska användas i VTIs simulator och det ska förhindra att fordonet välter. Utvecklingen av systemet kan delas in i tre större områden; beräkning av fordonets rollvinkel, framtagandet av ett rolloverindex samt skapandet av en regulator. Rollvinkeln är framtagen utifrån en lastbilsmodell med en frihestgrad, och skattades utifrån den mätta sidoaccelerationen. Rollhastigheten i sin tur skattades utifrån rollvinkeln. Ett rolloverindex som anger risken för vältning i varje ögonblick räknades fram med hjälp av rollvinkeln och rollhastigheten. Då indexet indikerar att vältning är nära aktiveras ett reglersystem. Detta system bromsar in lastbilen för att minska vältrisken. Examensarbetet avslutades med en studie utförd i simulatorn där försökspersoner körde både med och utan stabiliseringssytemet inkopplat. Scenariot i studien var speciellt utformat för att testa stabiliseringssystemet. Resultaten var inte entydiga, stabiliseringssystemet hjälpte i vissa situationer men i andra hade det motsatt effekt och fick lastbilen att välta snarare än att förhindra vältningen. Slutligen utvärderades nyttoeffekterna av det framtagna systemet.

Place, publisher, year, edition, pages
2010. , 43 p.
Keyword [en]
rollover, roll stability, simulator
National Category
Information Science
Identifiers
URN: urn:nbn:se:liu:diva-57276ISRN: LiTH-ISY-EX--10/4337--SEOAI: oai:DiVA.org:liu-57276DiVA: diva2:324863
Presentation
2010-06-08, Algoritmen, Linköping, 10:15 (Swedish)
Uppsok
Technology
Supervisors
Examiners
Available from: 2010-06-22 Created: 2010-06-15 Last updated: 2011-05-18Bibliographically approved

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CiteExportLink to record
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