overcomingchallengeschanginglives Upper Extremity Team Jamie Samuel Moore Emma Sarles Amy Hughes Hannah Folby Elizabeth Nicolas Robert Henry Guide: Gerald Garavuso
2 Presentation Agenda Catch&Launch Strike Project Updates Phase 4 Planning Project Objective Concept Selection Feasibility Analysis Material Considerations CAD Full System Layout CAD Exploded View Renderings Bill of Materials Feasibility Analysis Ergonomic Analysis Full System Architecture CAD Exploded View Rendering Bill of Materials Branding Purchasing Engineering Requirements Update Risk Management Testing Plan Subject Matter Expert Interviews Project Plans Individual Contributions
Project Objective Design a wheelchair attachment that provides user independence when throwing, catching, and striking objects. 3
Concept Selection Must meet functions: throw, catch, strike, attach Ease of Integration into mobility device Ease of Use User Independence 4 Feasibility Dislikes: Front of user Metal rails Likes: Handle in front of user Adjustable position Within dimensions of chair
Concept Selection Dislikes: Weight Safety Likes: User Interaction Can be adapted for better ergonomics Dislikes: Not Feasible for level 1 Good reaction time needed Likes: Accommodates most levels Incorporates all functions 5
6 Catch&Launch
Exploded View Catch&Launch 7
CAD System Design Layout Catch&Launch Rubber punch projects ball Handles attached to punch > moves as one *Increased exposure to view internals Tracks with bearings Extension spring 8
Feasibility Analysis Catch&Launch 9
Material Considerations Catch&Launch 2.0mm Premium High Density Poly Twine UV Treated & Stabilized 10 Polypropylene Thermoplastic Polymer Low energy surface Common glues will not work E=1300-1800N/mm 2 Attachment Drill a hole at the end of the cannon. Use small quick clip to attach the net.
Bill of Materials Catch&Launch Poly twine net PVC pipe for testing 11
Rendering Catch&Launch 12
Lever Attachment 13
14 Design Details
15 Exploded View Strike
16 Rendering Strike
System Design Layout Strike 17
Feasibility Analysis Strike Projectile Motion: Assumptions: Initial velocity = 11.2 m/s Distance traveled = 4.6m dd = vv!" tt +.5aa! tt! dd = vv!" tt +.5aa! tt! vv!" = vv!" + aaaa Momentum: Assumptions: COR gator ball = 0.3 Ball v i = v ball =0 m/s (sitting on a tee) Wiffle bat Mass is point load at end of bat where ball is in impact ee = vv!"#! vv!"##! vv!"## vv!"# Gear Analysis: Assumptions: Frictionless bearings ϴ = 75 VV = ωωωω = ωω!! ωω!! 2θθ TT!"# = MMMMMM MMMMMM = MMMMMM!"# + MMMMMM!!"#$% + MMMMMM!"#$% TT!" = TT!"# rr! rr! FF!"#$% = TT!" LL!!"#$% mm!"# vv!"# + mm!"## vv!"## = mm!"# vv!"#! + mm!"## vv!"##! 18
Bill of Materials Strike 19
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 20
Attach to Chair 21
Attachment Adjustable Track system vs.clips 22 *1 bar for 2 designs *Aluminum
23 Attachment
Project Updates 24
Branding overcomingchallengeschanginglives Titles: Shree Devanagari 714 Bold Subtitles: Shree Devanagari 714 Body: Helvetica Regular C=92 M=62 Y=12 K=1 25
26 Purchasing
Engineering Requirements Update Object diameter: Object mass: Horizontal angle thrown: Distance object struck: Number of mobility aids: Previous 0.0889 [m] 0.198 [kg] -45 - +45 1.524-9.144 [m] 75% Current 0.1542 [m] 0.068 [kg] -30 - +30 3.048-9.144 [m] Client s current students who use wheelchairs Redefining scope Centerline focus on both powered and standard wheelchairs Centerline focus on Gator Ball 27
28 Risk Management
Testing Plan Overall System 1. Attachment time of chosen attachment clips a. Mini Quick Fist b. Team designed rail clip 2. Team performing different physical activities from the wheelchair 3. Attachment adjustability range (height, distance from wheelchair) 29
Testing Plan Catch&Launch 1. Most effective device angle 2. Difficulty of activity 3. Catching and launching of different balls (size, material, weight) Lever Attachment 1. Use of different striking apparatus to make sure ball is hit within range 2. Difficulty of activity 3. Striking of different balls (size, material, weight) 30
Testing Plan Post IRB Approval 1. Target user will complete activities using the attachments 2. Questions: a. Is this device comfortable to use? b. Would you purchase this device? c. Do you feel included? d. Do you feel independent? 31
Plans for Phase 4 32
Subject Matter Expert Interviews Machining Materials Ergonomics and Human Factors Design for Manufacture Gear Design: Dr. Alfonso Aznar (Assoc Professor Mechanical Engineering) 33
34 Project Plan
Individual Contributions Hannah User testing Final feasibility of Lever Attachment CAD model - gears CAD drawings EDGE updates Amy Purchase required materials CAD drawings Update risk analysis Materials testing 35 Emma User Experience Refine CAD Drawings CAD Simulations Renderings Ergonomic analysis of Catch&Launch Jamie Model making Ergonomic analysis Presentation Process book Updates Robert CAD Drawings Fabrication Plans Access make vs. buy Develop MSD II project plan Liz Detailed target user test plan Interview subject matter experts CITI Training monitoring Materials Testing
36 Questions?