P14007: Wheelchair Assist

1. P14007: Wheelchair Assist Che-An Lee Phil Medalie Dan Schuster Tom Elliot

2. Team Roles

3. Agenda • Background • Problem Statement • Current Product • Stakeholders • Project Deliverables • Use Scenarios • Needs List • Theory of Operation • Engineering Requirements • House of Quality • Project Schedule

4. Background • Current manual wheel chair users face many daily challenges • Wheel Chair Assist Devices • Movement Assist Devices • Anti-Roll back Devices • Anti-Tip Devices

5. Problem Statement • Current State • Current anti-roll back and anti-tip products exist that can be added onto wheel chairs, as well as motorized wheel chairs to provide movement assistance • Majority of manual chairs do not come standard with these devices • Many of these assistance devices are expensive and inhibit some of the benefits of manual chairs • Desired State • The device should maintain all of the benefits of a manual wheel chair(light weight, small turning radius, compact, etc.) • The device should also be able to aid the user when traversing inclines and declines, as well as prevent roll back/tip-over movements • Project Goals • Design a system that encompasses the 4 desired properties while maintaining the key benefits of a manual chair • Key Desired Properties • Ability to provide movement assist up inclines • Ability to decelerate the user when moving down declines • Ability to prevent the wheel chair from rolling back down a hill and slipping out from under user • Ability to prevent the wheel chair from tipping over backwards • Constraints • The wheel chair should still meet ADA standards regarding size constraints(doorways, buildings, etc.) • System Cost

6. Current Products • Anti-Tip Devices • Anti-Rollback Devices • MagicWheels • Manual Chairs • Motorized Chairs Image References: http://www.rehabmart.com http://www.magicwheels.com/

7. Stakeholder • Wheelchair User • Caretaker • Inventor • MSD Team • RIT

8. Project Deliverables • Functional prototype which can be marketed to manufactures and a basis for a product that will ultimately be manufactured • Test data verifying engineering requirement • User’s guide for operation • Alternative design for future project

9. P 14007 Needs List

10. Use Scenarios Considered • User is going up a ramp, user regain grip and chair stops, incline assist activates to stops the chair from rolling down the ramp and provide energy to assist user move up the ramp • User is going down a ramp, user activates decline assist, chair de-accelerate and maintain a constant speed • User transporting in/out from the chair, anti-rollback activates to prevent chair rollback

11. Theory of Operation

12. Engineering Requirement

13. Engineering Requirement Cont’d

14. Engineering Requirement Cont’d

15. House of Quality Key Performance Metric

16. Project Schedule

17. Questions/Comments?