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Joseph Paradiso. Hayashida, Jeffrey Yukio, 1978- Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering 2007-09-28T13:48:26Z 2007-09-28T13:48:26Z 2000 2000 http://hdl.handle.net/1721.1/39086 47966447 Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000. Includes bibliographical references (leaf 31). A power generating system was designed to passively harness some of the kinetic energy available during walking. The system included a rotary arm extending down from the sole, which ultimately drove a pair of small electrical generators through a stepped-up gearbox. A one-way clutch mechanism was used to transmit torque to the gearbox. This allowed for additional spin following the initial impact of a step, also preventing lockup due to rotary inertia in the gears. The entire generator system was designed to fit in the heel of a standard running shoe, with the rotary arm compressing once during each heel strike. The final system produced a peak power of 1.61 Watts during the heel strike and an average power of 58.1 mW across the entire gait. To maximize power transfer, an ideal load was determined for the two DC generators connected in series. While the average power generated was below the desired 250 mW, initial calculations show this level can eventually be reached or exceeded with the addition of a flywheel to each generator shaft, or a spring to store more energy from the heel-strike. by Jeffrey Yukio Hayashida. S.B. 31 leaves eng Massachusetts Institute of Technology M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Mechanical Engineering. Unobtrusive integration of magnetic generator systems into common footwear Thesis application/pdf false Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="265c7315-63ec-4a40-ab36-27a423604765"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Unobtrusive integration of magnetic generator systems into common footwear</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2000</PublicationDate> <Authors> <Author> <DisplayName>Hayashida, Jeffrey Yukio, 1978-</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Mechanical Engineering.</Keyword> <Abstract>A power generating system was designed to passively harness some of the kinetic energy available during walking. The system included a rotary arm extending down from the sole, which ultimately drove a pair of small electrical generators through a stepped-up gearbox. A one-way clutch mechanism was used to transmit torque to the gearbox. This allowed for additional spin following the initial impact of a step, also preventing lockup due to rotary inertia in the gears. The entire generator system was designed to fit in the heel of a standard running shoe, with the rotary arm compressing once during each heel strike. The final system produced a peak power of 1.61 Watts during the heel strike and an average power of 58.1 mW across the entire gait. To maximize power transfer, an ideal load was determined for the two DC generators connected in series. While the average power generated was below the desired 250 mW, initial calculations show this level can eventually be reached or exceeded with the addition of a flywheel to each generator shaft, or a spring to store more energy from the heel-strike.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>