overcomingchallengeschanginglives

Transcription

1 overcomingchallengeschanginglives Upper Extremity Team Jamie Samuel Moore Emma Sarles Amy Hughes Hannah Folby Elizabeth Nicolas Robert Henry Guide: Gerald Garavuso

2 Presentation Agenda 2 Catch&Launch Strike Attachment Project Background Project Objective Engineering Requirements Development CAD System Architecture Feasibility Analysis Material Considerations Assembly Ergonomic Analysis Renderings Physical Model Development CAD System Architecture Feasibility Analysis Bill of Materials CAD Feasibility Analysis Full System Architecture Ergonomic Analysis Procurement Updates Combined BOM Fabrication Ideas Purchase Orders Product Test Plan Human Subject Test Plan Branding Risk Management Budget Project Plan Intersession MSD II/Capstone II

3 Project Background Assistive Technology No universal technologies available that allow physically challenged individuals to participate in recreational activities Lower extremity prototype, not manufacturable 3

4 Project Objective Design a wheelchair attachment that provides user independence when throwing, catching, and striking objects. 4

5 Finalized Engineering Requirements Object diameter: Object mass: Horizontal angle thrown: Distance object struck: Number of mobility aids: Previous [m] [kg] [m] 75% Current [m] [kg] [m] Client s current students who use wheelchairs Redefining scope Centerline focus on both powered and standard wheelchairs Centerline focus on Gator Ball 5

6 6 Catch&Launch

7 Development Catch&Launch Phase 2 Phase 3 Phase 4 7

8 CAD Catch&Launch 8

9 Detailed System Architecture Catch&Launch 9

10 Feasibility Analysis Catch&Launch 10

11 Material Considerations Catch&Launch AL 2024 Can be heat treated for shape Same material as common wheelchair Lightweight Long Lasting 2.0mm Premium High Density Poly Twine Young s Modulus: N/mm2 Commonly used in sports equipment Teflon Plunger Thermoplastic polymer Yield Strength: 23 MPa Young s Modulus: 0.5GPa Low Friction 11

12 Assembly Catch&Launch Net Frame Cannon Plunger Handles External Housing 12

13 Ergonomic Analysis Catch&Launch Bent Elbow to Finger Tips: 9 Years Old 17 Years Old 13.7 [in] 17.6 [in] Arm Extended Shoulder to Finger Tips: Arms Waist Distance Apart: Hand Width: 21.2 [in] 8.2 [in] 2.6 [in] 27.2 [in] 10.5 [in] 3.2 [in] Determined Track Length: 8 Determined Handle Height: 3 Determined Handle Distance from Canon: 2 Determined Handle Circumference: 2 13

14 Rendering Catch&Launch 14

15 Physical Models Catch&Launch 15

16 Lever Attachment 16

17 Development Strike Phase 2 Phase 3 17

18 CAD Strike Phase 4 18

19 Detailed System Architecture Strike 19

20 Feasibility Analysis Strike Assumptions: 1. Ball is stationary on tee 2. Ball is point load impact at very end of bat 3. Wiffle bat constant cross sectional area 4. Gator ball COR = Constant torque applied to handle by user 6. Distance ball travels is 3.048m 7. MOI of gears taken as a lump area of mass 8. Bat moves -85 to +85 full swing and makes contact at 0 9. Neglect air resistance of ball 10. Handle should move 45 20

21 Feasibility Analysis Strike Momentum: Inputs: mm bbbbbb = kkkk mm bbbbllll = kkkk vv bbbbllll = 0 mm/ss vv bbbbbbbb = 8.64 mm/ss ll bbbbtt = mm CCCCCC = 0.3 Equations: ee = vv bbbbtt vv bbbbbbbb vv bbbbllll vv bbbbtt mm bbbbtt vv bbbbtt + mm bbbbllll vv bbbbllll = mm bbbbtt vv bbbbtt + mm bbbbllll vv bbbbllll vv = ωωdd Values: vv bbbbtt = 9.14 mm/ss ωω bbbbtt = rr/ss 21 Gear ratio: Inputs: θθ llllllllll = 45 rr iiiiiiiiii = mm Equations: ωω ff = ωω 0 + ααtt θθ = ωω 0 tt ααtt2 ωω ff = ωω 2 ii + 2αα aaaa θθ ωω oooooo = rr iiii ωω iiii rr oooooo Values: tt = 1.95 ss αα llllllllll = rr/ss 2 ωω llllllllll = 6.0 rr/ss rr oooooopppppp = mm Torque: Inputs: θθ bbbbbb = 85 mm bbbbbb = kkgg ll bbbbtt = mm mm llllllllll = kkgg ll llllllllll = mm Equations: ωω ff = ωω ii 2 + 2αα aacc θθ αα bbbbbb = TT bbbbbb MMMMMM TT oooooo = rr oooooo TT iiii rr iiii TT = FFFF Values: αα bbbbbb = rr/ss 2 TT bbbbbb = 1.95 NNmm TT llllllllll = 6.95 NNmm FF iiiiiiiiii = 21.5 NN

22 Feasibility Analysis Strike Conclusion: To hit the ball at output speed 20mph - radius of internal ring gear = 0.062m - radius of center spur gear = 0.019m - input force = 21.5 N - input speed = 6.0 rad/s - input angle = 45 22

23 Bill of Materials Strike 23

24 Assembly Strike 24

25 Ergonomic Analysis Strike Wheelchair User Forward reach: Up: 48 Down: 15 Toward Handle: 7 Side reach with 10 distance between chair and wall: Up: 54 Down: 9 Preferred:15 Lever: Length: 2 Width: 4.7 Handle: 8 The Measure of Man & Woman by Henry Dreyfuss https: //simanaitissays.files.wordpress.com/2014/06/wheelchair.jpg 25

26 Attach to Chair 26

27 CAD Attachment 27 Manual Chair Solution Motorized Chair Solution

28 Feasibility Analysis Attachment Quick and easy locking mechanisms Heavy duty clamps rated for high loads Adjustability adaptability 28

29 Full System Architecture Attachment Telescoping bar for width adjustment Button and hole mechanism Height adjustment and break point to change leg type 29 Motorized Chair Legs Manual Chair Leg

30 Physical Model Attachment 30

31 Procurement 31

32 Combined Bill of Materials Most parts will be purchased Combined total of 70 parts Total cost: about $300 32

33 Fabrication CNC 3D Printing 33 Machining

34 Test Plans 34

35 35 Product Testing Plan

36 Human Subjects Test Plan 36

37 Project Updates 37

38 Branding Old overcomingchallengeschanginglives New overcomingchallengeschanginglives 38

39 39 Risk Management

40 40 Budget

41 41 Project Plan

42 42 Intersession

43 MSD II/Capstone II Hannah Feasibility analysis on lever strike system components Update CAD revisions Build lever system User Testing EDGE updates Amy Purchase required materials CAD drawings Update risk analysis Materials testing 43 Emma User Experience CAD Drawings Process Book Refine Ergonomics of Catch&Launch Ergonomics of Attachment Jamie Model making Ergonomic analysis Presentation Process book Updates Robert CAD Drawings Fabrication Plans Develop Assembly Tooling Make vs. Buy Liz Amend Test Plans Coordinating with P17046 Conducting Target User Interviews User Testing Material Testing

44 44 Questions?