A DYNAMICS-BASED FIDELITY ASSESSMENT OF PARTIAL GRAVITY GAIT SIMULATION USING UNDERWATER BODY SEGMENT BALLASTING

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dc.contributor.advisorAkin, David Len_US
dc.contributor.authorMirvis, Adam Danielen_US
dc.contributor.departmentAerospace Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2011-07-06T05:47:32Z
dc.date.available2011-07-06T05:47:32Z
dc.date.issued2011en_US
dc.description.abstractIn-water testing is frequently used to simulate reduced gravity for quasi-static tasks. For dynamic motions, however, the assumption has been that drag effects invalidate any data, and in-water testing has been dismissed in favor of complex and restrictive techniques such as counterweight suspension and parabolic flight. In this study, motion-capture was used to estimate treadmill gait metrics for three environments: underwater and ballasted to 1 g and to 1/6th g, and on dry land at 1 g. Ballast was distributed anthropometrically. Motion-capture results were compared with those for a simulated dynamic walker/runner, and used to assess the effect of the in-water environment on simulation fidelity. For each test case, the model was tuned to the subject's anthropometry, and stride length, pendulum frequency, and hip displacement were computed. In-water environmental effects were found to be sufficiently quantifiable to justify using in-water testing, under certain conditions, to study partial-gravity gait dynamics.en_US
dc.identifier.urihttp://hdl.handle.net/1903/11497
dc.subject.pqcontrolledAerospace Engineeringen_US
dc.subject.pqcontrolledBiomechanicsen_US
dc.subject.pqcontrolledEngineeringen_US
dc.subject.pquncontrolledballastingen_US
dc.subject.pquncontrolledgaiten_US
dc.subject.pquncontrolledgait dynamicsen_US
dc.subject.pquncontrolledmotion captureen_US
dc.subject.pquncontrolledpartial gravity simulationen_US
dc.subject.pquncontrolledtreadmillen_US
dc.titleA DYNAMICS-BASED FIDELITY ASSESSMENT OF PARTIAL GRAVITY GAIT SIMULATION USING UNDERWATER BODY SEGMENT BALLASTINGen_US
dc.typeThesisen_US

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