Linear and Angular Head Accelerations in Daily Life

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dc.contributor.authorBussone, Williamen
dc.contributor.committeechairDuma, Stefan M.en
dc.contributor.committeememberGabler, Hampton Clayen
dc.contributor.committeememberStitzel, Joel D.en
dc.contributor.committeememberMadigan, Michael L.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:43:42Zen
dc.date.adate2005-09-05en
dc.date.available2014-03-14T20:43:42Zen
dc.date.issued2005-07-29en
dc.date.rdate2007-09-05en
dc.date.sdate2005-08-18en
dc.description.abstractThe purpose of this study was to determine the linear accelerations, angular rates, and angular accelerations of the center of gravity of the head during daily activities and to determine the effect of angular terms on the linear accelerations. A total of 700 experiments were conducted with 18 subjects performing 13 different tasks. Resultant maxima were 93.6 m/s² for linear acceleration, 931.3 rad/s for angular acceleration and 9.03 rad/s for angular rate. Comparisons by gender were statistically significant in 21.9% of cases. Qualitatively, subject effort appeared to be the most important factor. Average error was strongly influenced by the type of motion in each event, ranging from -3.1% to 115.2% when converting from mouthpiece resultant accelerations to center of gravity acceleration. Error increases as angular rates and accelerations increase. Mouthpiece array accelerations are statistically significantly different than center of gravity accelerations in 86.3% of comparisons. Array designs from the literature are significantly different than center of gravity accelerations with equal frequency to the mouthpiece. Peak accelerations from Allen et al 1994 may require correction of up to 2G and 80% to obtain center of gravity accelerations. Angular terms must be accounted for even at daily activity levels.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-08182005-222028en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08182005-222028/en
dc.identifier.urihttp://hdl.handle.net/10919/34615en
dc.publisherVirginia Techen
dc.relation.haspartthesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectHeaden
dc.subjectAccelerationen
dc.subjectLinearen
dc.subjectAngularen
dc.titleLinear and Angular Head Accelerations in Daily Lifeen
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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