<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-09-21T00:12:40Z</responseDate><request verb="GetRecord" identifier="oai:dspace.mit.edu:1721.1/120266" metadataPrefix="dim">https://dspace.mit.edu/server/oai/request</request><GetRecord><record><header><identifier>oai:dspace.mit.edu:1721.1/120266</identifier><datestamp>2022-01-13T07:54:05Z</datestamp><setSpec>com_1721.1_7582</setSpec><setSpec>com_1721.1_7581</setSpec><setSpec>col_1721.1_131024</setSpec></header><metadata><dim:dim xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://www.dspace.org/xmlns/dspace/dim http://www.dspace.org/schema/dim.xsd">
   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">H. Harry Asada.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="author" lang="en_US">Abdalla, Ali Alsalih</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="other" lang="en_US">Massachusetts Institute of Technology. Department of Mechanical Engineering.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="department">Massachusetts Institute of Technology. Department of Mechanical Engineering</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="accessioned">2019-02-05T16:02:24Z</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="available">2019-02-05T16:02:24Z</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="copyright" lang="en_US">2018</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="issued" lang="en_US">2018</dim:field>
   <dim:field mdschema="dc" element="identifier" qualifier="uri">http://hdl.handle.net/1721.1/120266</dim:field>
   <dim:field mdschema="dc" element="identifier" qualifier="oclc" lang="en_US">1083220124</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Cataloged from PDF version of thesis.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Includes bibliographical references (page 35).</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="abstract" lang="en_US">This thesis presents the testing of speed reduction exhibited by custom angle mecanum wheels. A simple trigonometric model is put forth for the speed reduction, along with the kinematic analysis and simulation of a 3-wheeled-vehicle. Then a 150 mecanum wheel is designed and built, along with a testing fixture allowing it to freely move in the direction the roller pushes towards. This fixture also allowed the collection of the encoder data from the motor and the linear distance the wheel travels. Based on that, the detected speed reduction ratio was 4.9:1, as opposed to the modeled ratio of 3.9:1. This discrepancy is likely cause by the absence of slippage in our model, the jiggle in the wheel's motion, the compliancy of the surface it rotates on, as well as the uncertainty from the linear distance measurement.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="statementofresponsibility" lang="en_US">by Ali Alsalih Abdalla.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="degree" lang="en_US">S.B.</dim:field>
   <dim:field mdschema="dc" element="format" qualifier="extent" lang="en_US">35 pages</dim:field>
   <dim:field mdschema="dc" element="language" qualifier="iso" lang="en_US">eng</dim:field>
   <dim:field mdschema="dc" element="publisher" lang="en_US">Massachusetts Institute of Technology</dim:field>
   <dim:field mdschema="dc" element="rights" lang="en_US">MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission.</dim:field>
   <dim:field mdschema="dc" element="rights" qualifier="uri" lang="en_US">http://dspace.mit.edu/handle/1721.1/7582</dim:field>
   <dim:field mdschema="dc" element="subject" lang="en_US">Mechanical Engineering.</dim:field>
   <dim:field mdschema="dc" element="title" lang="en_US">Angled roller mecanum wheel design that exhibits speed reduction</dim:field>
   <dim:field mdschema="dc" element="type" lang="en_US">Thesis</dim:field>
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   	&lt;Title>Angled roller mecanum wheel design that exhibits speed reduction&lt;/Title>
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   	&lt;PublicationDate>2018&lt;/PublicationDate>
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        	&lt;DisplayName>Abdalla, Ali Alsalih&lt;/DisplayName>
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    &lt;Keyword>Mechanical Engineering.&lt;/Keyword>
   	&lt;Abstract>This thesis presents the testing of speed reduction exhibited by custom angle mecanum wheels. A simple trigonometric model is put forth for the speed reduction, along with the kinematic analysis and simulation of a 3-wheeled-vehicle. Then a 150 mecanum wheel is designed and built, along with a testing fixture allowing it to freely move in the direction the roller pushes towards. This fixture also allowed the collection of the encoder data from the motor and the linear distance the wheel travels. Based on that, the detected speed reduction ratio was 4.9:1, as opposed to the modeled ratio of 3.9:1. This discrepancy is likely cause by the absence of slippage in our model, the jiggle in the wheel&amp;apos;s motion, the compliancy of the surface it rotates on, as well as the uncertainty from the linear distance measurement.&lt;/Abstract>
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