An analysis of parameters related to the directional instability of rear caster wheelchairs

Timothy J. Collins
A five degree of freedom dynamic model which uses a quasi-static approximation for lateral load transfer effects has been developed as a means of investigating the inherent directional instability associated with rear caster wheelchairs. Using a treadmill and test cart, the dependence of lateral wheelchair tire cornering force on variables such as forward speed, inflation pressure, camber angle, slip angle, and vertical load have been experimentally determined. A model has been developed which predicts wheelchair...
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