Development and Execution of a Testing Strategy for Omnidirectional Wheels
Name
donnellan-donne653-meng-meche-2024-thesis.pdf
Description
Thesis PDF
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170.74 MB
Format
Adobe PDF
Checksum (MD5)
1babed2cb028aaae130dffe65d84d314
Author(s)
Donnellan, Michael J.
Advisor(s)
Hardt, David E.
Date Issued
September 2024
Publisher
Massachusetts Institute of Technology
Abstract
Omnidirectional wheels enable robots to achieve holonomic motion; however, this often comes at the cost of increased rolling resistance compared to traditional caster wheels. The rolling resistance in omnidirectional wheels is higher than in many other wheels due to several factors including an irregular tread shape, material compliance, and friction in the bushinglike cross rollers during lateral motion. Testing standards exist for characterizing the rolling resistance, compressive strength, and other attributes of commonly used wheels such as caster wheels. However, there are no comprehensive testing standards or research that broadly characterize the performance of omnidirectional wheels. Here, test methods are described for characterizing the load relaxation, stiffness, and rolling resistance of omnidirectional wheels, and the results from these tests are presented. Test apparatuses for static loading and rolling resistance were created. Test results were analyzed to determine important factors for determining the ultimate compressive strength in static loading and the rolling resistance coefficient of an array of omnidirectional wheels, and results indicate wheel manufacturing methods and materials are the most important factors for determining these responses.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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