overcomingchallengeschanginglivesedge.rit.edu/content/p17047/public/detailed design documents/phase...
TRANSCRIPT
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overcomingchallengeschanginglives
Guide: Gerald Garavuso
Jamie Samuel Moore | Emma Sarles | Amy HughesHannah Folby | Elizabeth Nicolas | Robert Henry
Upper Extremity Team
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Presentation Agenda
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Project Objective Concept SelectionFeasibility 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 UpdateRisk Management Testing Plan Subject Matter Expert InterviewsProject Plans Individual Contributions
Cat
ch&
Laun
chSt
rike
Proj
ect
Upd
ates
Phas
e 4
Plan
ning
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Project Objective
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“Design a wheelchair attachment that provides user independence
when throwing, catching, and striking objects.”
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Concept Selection
• Must meet functions: throw, catch, strike, attach
• Ease of Integration into mobility device
• Ease of Use
• User Independence
• FeasibilityDislikes:• Front of user• Metal railsLikes:• Handle in front of user• Adjustable position• Within dimensions of chair
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Concept Selection
Dislikes:• Weight• SafetyLikes:• User Interaction• Can be adapted for better ergonomics
Dislikes:• Not Feasible for level 1• Good reaction time neededLikes:• Accommodates most levels •Incorporates all functions
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Catch&Launch
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Exploded View | Catch&Launch
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CAD System Design Layout | Catch&Launch
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*Increased exposure to view internals Extension springTracks with bearings
Rubber punch projects ball Handles attached to punch > moves as one
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Feasibility Analysis | Catch&Launch
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AttachmentDrill a hole at the end of the cannon. Use small quick clip to attach the net.
2.0mm Premium High Density Poly TwineUV Treated & Stabilized
Polypropylene Thermoplastic PolymerLow energy surface Common glues will not workE=1300-1800N/mm2
Material Considerations | Catch&Launch
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Bill of Materials | Catch&Launch
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Poly twine net PVC pipe for testing
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Rendering | Catch&Launch
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Lever Attachment
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Design Details
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Exploded View | Strike
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Rendering | Strike
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System Design Layout | Strike
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Feasibility Analysis | Strike
ProjectileMotion:Assumptions:
• Initialvelocity=11.2m/s• Distancetraveled=4.6m
𝑑𝑑 = 𝑣𝑣!"𝑡𝑡 + .5𝑎𝑎!𝑡𝑡!𝑑𝑑 = 𝑣𝑣!"𝑡𝑡 + .5𝑎𝑎!𝑡𝑡!𝑣𝑣!" = 𝑣𝑣!" + 𝑎𝑎𝑎𝑎Momentum:Assumptions:
• COR“gatorball”=0.3• Ballvi=vball=0m/s(sittingonatee)• Wifflebat• Massispointloadatendofbatwhereballis
inimpact
𝑒𝑒 =𝑣𝑣!"#! − 𝑣𝑣!"##!
𝑣𝑣!"## − 𝑣𝑣!"#
𝑚𝑚!"#𝑣𝑣!"# +𝑚𝑚!"##𝑣𝑣!"## = 𝑚𝑚!"#𝑣𝑣!"#! +𝑚𝑚!"##𝑣𝑣!"##!
GearAnalysis:Assumptions:
• Frictionlessbearings• ϴ=75°
𝑉𝑉 = 𝜔𝜔𝜔𝜔
∝=𝜔𝜔!! − 𝜔𝜔!!
2𝜃𝜃
𝑇𝑇!"# =∝ 𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀𝑀 = 𝑀𝑀𝑀𝑀𝑀𝑀!"# +𝑀𝑀𝑀𝑀𝑀𝑀!!"#$% +𝑀𝑀𝑀𝑀𝑀𝑀!"#$%
𝑇𝑇!" = 𝑇𝑇!"#𝑟𝑟!𝑟𝑟!
𝐹𝐹!"#$% =𝑇𝑇!"
𝐿𝐿!!"#$%
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Bill of Materials | Strike
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Ergonomic Analysis | Strike
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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 Dreyfusshttps: //simanaitissays.files.wordpress.com/2014/06/wheelchair.jpg
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Attach to Chair
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Attachment
Track system vs .clips
Adjustable
*1 bar for 2 designs*Aluminum
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Attachment
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Project Updates
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Branding
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Outlined Text
Titles: Shree Devanagari 714 Bold
Subtitles: Shree Devanagari 714
Body: Helvetica Regular
C=92 M=62 Y=12 K=1
overcomingchallengeschanginglives
overcomingchallengeschanginglives
Outlined Text
Titles: Shree Devanagari 714 Bold
Subtitles: Shree Devanagari 714
Body: Helvetica Regular
C=92 M=62 Y=12 K=1
overcomingchallengeschanginglives
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Purchasing
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Engineering Requirements Update
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0.0889 [m]
0.198 [kg]
-45° - +45°
1.524 - 9.144 [m]
75%
0.1542 [m]
0.068 [kg]
-30° - +30°
3.048 - 9.144 [m]
Client’s current students who use wheelchairs
Object diameter:
Object mass:
Horizontal angle thrown:
Distance object struck:
Number of mobility aids:
Previous Current
Redefining scope •Centerline focus on both powered and standard wheelchairs •Centerline focus on Gator Ball
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Risk Management
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Testing Plan
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Overall System1. Attachment time of chosen attachment “clips” a. Mini Quick Fist® b. Team designed rail “clip”2. Team performing different physical activities from the wheelchair3. Attachment adjustability range (height, distance from wheelchair)
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Testing Plan
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Lever Attachment1. Use of different striking apparatus to make sure ball is hit within range2. Difficulty of activity3. Striking of different balls (size, material, weight)
Catch&Launch1. Most effective device angle 2. Difficulty of activity 3. Catching and launching of different balls (size, material, weight)
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Testing Plan
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Post IRB Approval1. Target user will complete activities using the attachments2. Questions: a. Is this device comfortable to use? b. Would you purchase this device? c. Do you feel included? d. Do you feel independent?
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Plans for Phase 4
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Subject Matter Expert Interviews
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• Machining Materials• Ergonomics and Human Factors• Design for Manufacture• Gear Design: Dr. Alfonso Aznar (Assoc Professor Mechanical Engineering)
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Project Plan
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Individual Contributions
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Hannah
• User testing• Final feasibility of Lever Attachment• CAD model - gears• CAD drawings• EDGE updates
Emma
• User Experience• Refine CAD Drawings• CAD Simulations• Renderings• Ergonomic analysis of Catch&Launch
Robert
• CAD Drawings• Fabrication Plans• Access make vs. buy• Develop MSD II project plan
Amy
• Purchase required materials• CAD drawings• Update risk analysis • Materials testing
Jamie
• Model making• Ergonomic analysis• Presentation• Process book Updates
Liz
• Detailed target user test plan• Interview subject matter experts• CITI Training monitoring • Materials Testing
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Questions?