Simulation model of a lever-propelled wheelchair

Area of Science:

• Rehabilitation Engineering
• Biomechanics
• Human-Computer Interaction

Background:

• Wheelchair efficiency is user-dependent, requiring precise interface adjustments.
• Current wheelchair prescription and tuning are complex, often relying on experienced engineers.
• Optimizing the wheelchair propulsion interface is crucial for user mobility and comfort.

Purpose of the Study:

• To develop a musculoskeletal model for wheelchair lever propulsion.
• To enable virtual exploration of wheelchair lever-propulsion interface settings.
• To support the design and prescription of optimized wheelchairs.

Main Methods:

• Conducted wheelchair lever propulsion experiments recording joint and lever angles, and forces/moments.
• Extracted kinematic and dynamic features from experimental data.
• Developed and verified a musculoskeletal model using computer simulations.

Main Results:

• Lever propulsion involves cyclical, 3D upper extremity motion.
• Joint torques for propulsion remain within a consistent range.
• The developed model accurately simulates basic lever propulsion (pushing and pulling).

Conclusions:

• A validated musculoskeletal model for wheelchair lever propulsion has been developed.
• This model facilitates virtual testing of wheelchair interface designs.
• The model can aid engineers and practitioners in optimizing wheelchair configurations.