Technical Note: A Novel Servo-Driven Dual-Roller Handrim Wheelchair Ergometer

Area of Science:

• Biomechanics
• Rehabilitation Engineering
• Sports Science

Background:

• Field measurements of wheelchair propulsion are challenging due to non-stationary driving conditions.
• Laboratory settings offer a controlled environment for standardized wheelchair measurements.
• Existing wheelchair ergometers are often custom, costly, and poorly documented.

Purpose of the Study:

• To develop a novel wheelchair ergometer for standardized laboratory-based performance analysis.
• To facilitate comparable measurements in research, clinical settings, and adapted sports.
• To aid in capacity assessment, training, and skill acquisition for wheelchair users.

Main Methods:

• Development of an instrumented dual-roller wheelchair ergometer.
• Integration of two servomotors to simulate translational inertia and resistive forces.
• Inclusion of load cells on each roller to measure user-generated torque, force, and timing patterns.

Main Results:

• The ergometer allows for performance analysis using an individual's personal handrim wheelchair.
• It simulates realistic propulsion dynamics based on force input and a mechanical model.
• Preliminary data collection on user-generated forces and torques has been initiated.

Conclusions:

• The developed wheelchair ergometer provides a standardized platform for lab-based propulsion analysis.
• It supports capacity assessment and training in rehabilitation and adapted sports.
• This device addresses the need for accessible, documented, and comparable wheelchair ergometry.