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Beta-prototype of a rickshaw suspension system

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dc.contributor.advisor Barbara Hughey. en_US McDonald, Heather E. (Heather Elizabeth) en_US
dc.contributor.other Massachusetts Institute of Technology. Dept. of Mechanical Engineering. en_US
dc.coverage.spatial a-ii--- en_US 2012-01-30T17:02:18Z 2012-01-30T17:02:18Z 2011 en_US 2011 en_US
dc.description Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011. en_US
dc.description Cataloged from PDF version of thesis. en_US
dc.description Includes bibliographical references (p. 64). en_US
dc.description.abstract A suspension system was designed to make The Rickshaw Bank's bicycle-powered rickshaws more comfortable for the drivers. A four bar linkage with a rising rate spring was chosen as the design. An unconventional material-tire rubber-was used as the spring material because it is inexpensive, requires limited tooling, and is in vast supply near The Rickshaw Bank's factory in Assam, India. Different configurations of tire rubber were tested to see how the size, length, and placement of the spring affected the system's performance. Bode Plots of the system's response function were generated for each configuration. The functionality of the suspension system within the 10-20 Hz range was of premier importance because it is in this frequency range that the bicycle-powered rickshaws most often operate, based on their speed and the road conditions the rickshaw regularly encounters. Ultimately, it was demonstrated that the placement of the spring within the suspension system had the greatest effect on the system's response. The configuration that applied the greatest moment to the top link of the four bar linkage performed best. Surprisingly, any advantages arising from varying the geometry of the tire rubber pieces were lost to friction and the effect of the ply embedded in the tire rubber. In order to properly verify the optimal spring placement and tire rubber spring geometry, a suspension system that takes this paper's findings into account should be tested with a rickshaw in India. en_US
dc.description.statementofresponsibility by Heather E. McDonald. en_US
dc.format.extent 64 p. en_US
dc.language.iso eng en_US
dc.publisher Massachusetts Institute of Technology en_US
dc.rights 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. en_US
dc.rights.uri en_US
dc.subject Mechanical Engineering. en_US
dc.title Beta-prototype of a rickshaw suspension system en_US
dc.type Thesis en_US S.B. en_US
dc.contributor.department Massachusetts Institute of Technology. Dept. of Mechanical Engineering. en_US
dc.identifier.oclc 773610231 en_US

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