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Related Experiment Videos

Racing wheelchair crown compensation.

R A Cooper1

  • 1Department of Electrical and Computer Engineering, University of California, Santa Barbara 93106.

Journal of Rehabilitation Research and Development
|January 1, 1989
PubMed
Summary
This summary is machine-generated.

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This study evaluated racing wheelchair crown compensators for directional stability on crowned roads. The push-push and push-pull compensator types demonstrated superior safety and desirable characteristics compared to the pull-pull type.

Area of Science:

  • Biomechanics
  • Sports Engineering
  • Vehicle Dynamics

Background:

  • Racing wheelchairs face directional stability challenges on crowned roads.
  • Crown compensators are crucial for maintaining stability and safety.
  • Existing compensator designs vary in effectiveness and safety.

Purpose of the Study:

  • To evaluate the directional stability of racing wheelchairs on crown roads.
  • To compare the performance of three crown compensator types: push-pull, push-push, and pull-pull.
  • To derive and compare equations for minimum spring force with existing compensator settings.

Main Methods:

  • Described and evaluated three types of crown compensators.
  • Derived equations for minimum spring force to counteract downhill turning moments.

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  • Compared theoretical force requirements with actual preset forces in existing compensators.

    • Main Results:

    • Push-push and push-pull compensators exhibited more desirable characteristics and were generally safer than the pull-pull type.
    • The force required for directional stability was less than the force needed to deflect the crown compensator.
    • Athletes prefer stiffer compensators for disturbance rejection and to offset kinematic asymmetries.

    Conclusions:

    • Push-push and push-pull crown compensators are recommended for enhanced racing wheelchair safety and stability.
    • Manufacturer cost-effectiveness favors building stiffer compensators for broader compatibility.
    • Compensator stiffness is influenced by athlete preference for stability and performance optimization.