Development and Execution of a Testing Strategy for Omnidirectional Wheels

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.

Name thesis:degree_name

Master

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Mechanical Engineering

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2024

Author dc:creator

• Donnellan, Michael J.

Advisor dc:contributor.advisor

• Hardt, David E.

Statement dc:rights

• In Copyright - Educational Use Permitted
• Copyright retained by author(s)

Licence dc:rights.uri

• https://rightsstatements.org/page/InC-EDU/1.0/

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/157242

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/157242