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P14007: Wheelchair Assist

P14007: Wheelchair Assist. Che -An Lee – Industrial and System Engineer Dan Schuster – Mechanical Engineer Phil Medalie – Mechanical Engineer Tom Elliot – Electrical Engineer. Agenda. Functional Decomposition System Architecture Morphological Table Alternatives Considered

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P14007: Wheelchair Assist

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  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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