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A steering linkage for short wheelbase vehicles: design and evaluation in a wheelchair power base--a technical note
1Department of Rehabilitation Science and Technology, University of Pittsburgh, PA 15260, USA. dbrienza+@pitt.edu
Abstract:
An Ackerman steering linkage for short wheelbase, four-wheel vehicles has been developed. The linkage coordinates the steering angle of each wheel through a range of 180 degrees with minimal misalignment between wheels. Control of steering angles is accomplished using a single linear actuator. Control complexity is lower compared to four-wheel systems using individually controlled steering actuators for each wheel. A prototype linkage that provides a minimum turning radius while maintaining maximum stability has been developed and evaluated for a power wheelchair base. The single-actuator linkage is well suited for this application, due to the cost-sensitive nature of wheelchair products.
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