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dc.contributor.authorBoggs, Christopher Matthewen
dc.date.accessioned2014-03-14T20:41:57Zen
dc.date.available2014-03-14T20:41:57Zen
dc.date.issued2004-07-21en
dc.identifier.otheretd-07252004-175717en
dc.identifier.urihttp://hdl.handle.net/10919/34161en
dc.description.abstractThis study conducted a series of road tests in the regular fleet operations of a revenue service to better understand the relationship between vehicle seat design and driver fatigue, improve two newly proposed objective methods for evaluating driver fatigue, and provide design guidelines for evaluating and improving vehicle seat characteristics in terms of driver fatigue. Each driver completed a test session on two seat cushions - one a polyurethane foam cushion and one an air-inflated cushion. Objective measurements of pressure distribution were taken throughout each test session, while subjective measurements were collected using surveys taken at one-hour intervals. Based on these results, we find that the air-inflated seat cushion has advantages in terms of subjective measures of comfort, support, and fatigue. We show that the objective measure aPcrms highlights characteristic differences between seat cushions, as the air-inflated seat cushion provides less area in high pressure regions, thus occluding less blood flow to tissue in the seated area. While we were unable to effectively assess the validity of the proposed measures or improve them further, the characteristic difference between seat cushions is not highlighted by using previously existing objective measures. This implies that aPcrms is a more useful measure and should be considered when evaluating the subjective quality of seat cushion designs under dynamic conditions, such as those existing in commercial truck driving.en
dc.publisherVirginia Techen
dc.relation.haspartThesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectair-inflated seat cushionen
dc.subjectfatigue metricsen
dc.titleField Study to Evaluate Driver Fatigue Performance in Air-Inflated Truck Seatsen
dc.typeThesisen
dc.contributor.departmentMechanical Engineeringen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineMechanical Engineeringen
dc.contributor.committeechairAhmadian, Mehdien
dc.contributor.committeememberMadigan, Michael L.en
dc.contributor.committeememberSandu, Corinaen
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07252004-175717/en
dc.date.sdate2004-07-25en
dc.date.rdate2005-07-29en
dc.date.adate2004-07-29en


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