Modeling Wheelchair-Users Undergoing Vibrations.

Area of Science:

• Biomechanics
• Mechanical Engineering
• Human Factors Engineering

Background:

• Vibrations significantly impact wheelchair users' comfort and health.
• Existing models may not accurately capture the dynamic response of seated wheelchair users to vibrations.

Purpose of the Study:

• To develop a validated procedure for modeling wheelchair users subjected to vibrations.
• To establish subject-specific design criteria for wheelchair seating and suspension systems.

Main Methods:

• Acquisition of experimental data using a wheelchair simulator.
• Development of a seated wheelchair user model using maximum likelihood estimation.
• Identification and verification of model parameters using experimental datasets.

Main Results:

• A two-segment rotational link model was found adequate for characterizing vibratory response.
• Model parameters were successfully identified and validated against additional experimental results.
• The developed model accurately represents the dynamic behavior of wheelchair users under vibration.

Conclusions:

• The proposed modeling procedure provides a robust method for analyzing wheelchair user dynamics.
• This approach enables the development of personalized design criteria for improved wheelchair ergonomics.
• The model can inform the design of advanced wheelchair seating and suspension for enhanced user experience.