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oai:www.ideals.illinois.edu:2142/81067 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

110 p. Chapman, Patrick L. Niu, Penglin 2015-09-25T20:09:28Z 2015-09-25T20:09:28Z 10000-01-01 2007 2007 This thesis addresses the design procedure for biomechanical energy conversion systems. First, four motions---heel strike, joint motion, center-of-mass motion, and horizontal foot movement---are analyzed. Center-of-mass motion and horizontal foot movement are identified as the energetic motions. Based on the characteristics of the motions, a linear permanent magnet generator topology is proposed as the actuation topology. Magnetic equivalent circuits are developed for the linear generator. Linear generators are modeled and optimized for the maximum-power output. To transfer the energy into the battery load, a maximum-power extraction circuit is proposed as the interface between the generator and battery load. The circuit functions as a matched resistor to the generator internal resistance. A test generator for center-of-mass motion is built and tested with impedance matching circuit. Average power from 90 mW to 360 mW are measured for different walking conditions. Made available in DSpace on 2015-09-25T20:09:28Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3301203.pdf: 2759535 bytes, checksum: ecd743de9d084253fb0a716557cec0bc (MD5) Previous issue date: 2007 Embargo set by: Seth Robbins for item 82349 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2007. http://hdl.handle.net/2142/81067 (MiAaPQ)AAI3301203 eng Engineering, Electronics and Electrical Biomechanical Energy Conversion text Electrical and Computer Engineering Electrical and Computer Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.