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When is it too late to brake?

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dc.contributor.authorChen, Yangen
dc.contributor.authorZhang, Zichenen
dc.contributor.authorNeighborgall, Campbellen
dc.contributor.authorAhmadian, Mehdien
dc.date.accessioned2022-12-12T17:52:10Zen
dc.date.available2022-12-12T17:52:10Zen
dc.date.issued2022-11-22en
dc.date.updated2022-12-12T14:58:27Zen
dc.description.abstractThis paper provides a simulation analysis of the braking action that would prevent untripped rollovers of long combination vehicles (LCV) in turns when the entry speed into a turn exceeds the vehicle’s threshold. A co-simulation model is used to integrate the details of truck pneumatic brakes (developed in Simulink®) in a TruckSim® model. The models are validated with  field-test data. Using the validated models, various braking initiation times (relative to the start of steering) are performed for a 150-ft J-turn. The simulation results reveal that at higher speeds, there is very little time for the driver to initiate braking before it is too late to avoid a rollover, referred to as Critical Brake Initiation Time (CBIT). For instance, at an entry speed of 40 mph (64 km/hr), applying the brakes for a fully-loaded truck beyond 1.0s would not prevent a rollover. The results also indicate that increasing the speed by 25% from 40 mph (64 km/hr) to 50 mph (80 km/hr), reduces CBIT by 90%, from 1.0s to 0.1s. The effect of cargo load on CBIT is less dramatic than speed. At 40 mph (64 km/hr), increasing the cargo load by 47%, from 15,000 lb. (6800 kg) to 22,000lb. (10,000 kg), decreases the CBIT by 17%, from 1.2s to 1.0s.en
dc.description.versionAccepted versionen
dc.format.extentPages 1-24en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1080/00423114.2022.2144386en
dc.identifier.eissn1744-5159en
dc.identifier.issn0042-3114en
dc.identifier.orcidAhmadian, Mehdi [0000-0003-1171-4896]en
dc.identifier.orcidChen, Yang [0000-0002-3212-8688]en
dc.identifier.urihttp://hdl.handle.net/10919/112855en
dc.language.isoenen
dc.publisherTaylor & Francisen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.titleWhen is it too late to brake?en
dc.title.serialVehicle System Dynamicsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherJournal Articleen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Engineeringen
pubs.organisational-group/Virginia Tech/Engineering/Mechanical Engineeringen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Engineering/COE T&R Facultyen

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