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Related Experiment Videos

Powered wheelchair bucking.

L Bennett

    Journal of Rehabilitation Research and Development
    |January 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Researchers tested six powered wheelchairs for bucking tendencies using a simulated arm. Friction significantly reduced bucking, suggesting stability improvements through changes in natural frequency and damping characteristics.

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    Area of Science:

    • Biomechanics
    • Robotics
    • Rehabilitation Engineering

    Background:

    • Powered wheelchairs are crucial mobility devices.
    • Wheelchair bucking, a dynamic instability, can compromise user safety and performance.
    • Understanding the factors influencing bucking is essential for design improvements.

    Purpose of the Study:

    • To investigate the bucking tendencies of powered wheelchairs under varying friction conditions.
    • To determine the relationship between wheelchair dynamics and bucking behavior.
    • To identify potential methods for mitigating powered wheelchair bucking.

    Main Methods:

    • A simulated flaccid forearm with adjustable friction (zero and large) was utilized.
    • Six different powered wheelchairs were subjected to testing with the dummy driver.

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  • Bucking was induced and observed under controlled laboratory conditions.

    • Main Results:

    • Bucking was easily induced in 5 out of 6 wheelchairs under zero friction conditions.
    • Introducing friction to the simulated forearm prevented bucking in 5 out of 6 tested wheelchairs.
    • Bucking was not directly correlated with standard performance metrics like speed or acceleration.

    Conclusions:

    • Friction plays a significant role in preventing powered wheelchair bucking.
    • Sustained bucking indicates neutral stability in speed-regulated machines.
    • Modifying natural frequency and damping characteristics shows promise for reducing wheelchair bucking.