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Innovative Wheelchair Design for Enhanced User Control and Safety

This project presents an advanced wheelchair solution, integrating user feedback and mechanical engineering principles. Emphasizing functional decomposition and system architecture, the design explores multiple alternatives including incline sensing for user control, adjustable speed for uphill navigation, and integrated braking systems. Through rigorous engineering analysis, including torque and motor evaluations, the team, consisting of engineers in industrial and mechanical fields, developed a comprehensive test plan and risk assessment to ensure safety and effectiveness. The final concept aims to improve user autonomy and safety.

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Innovative Wheelchair Design for Enhanced User Control and Safety

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Presentation Transcript

  1. P14007: Wheelchair Assist Che-An Lee – Industrial and System Engineer Dan Schuster – Mechanical Engineer Phil Medalie – Mechanical Engineer Tom Elliot – Electrical Engineer

  2. Agenda • Functional Decomposition • System Architecture • Morphological Table • Alternatives Considered • Selected Concept • Engineering Analysis • Risk Assessment • Test Plan • Project Schedule

  3. Functional Decomposition

  4. System Architecture

  5. Morphological Table

  6. Alternatives Considered

  7. Alternatives Considered Cont’d

  8. Alternatives Considered Cont’d

  9. Selected Concept • Sense Incline- User Input • Adjust Speed (Uphill)- User Control • Apply Energy (Uphill)- Gear System • Hold the Wheelchair (Uphill)- Ratchet • Brake the Chair- Brakes

  10. System Integration • Gear & lever and braking systems would be placed between wheel and chair frame • Planetary gearbox would be placed on outside of wheel • Secondary gear and levers would be placed either on side plate or where current wheel locks are

  11. Engineering Analysis • Torque Analysis • Motor Analysis • Spring Analysis • Ratchet Benchmarking • IR Benchmarking

  12. Free Body Diagram and Coordinates

  13. Equations of Motion and System Parameters

  14. MATLAB Results T = 42 Nm, = 21Nm per wheel

  15. Test Plan

  16. Test Plan Cont’d

  17. Risk Assessment

  18. Risk Assessment Cont’d

  19. Project Schedule

  20. Question/ Comments?

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