overcomingchallengeschanginglives

Guide: Gerald Garavuso

Jamie Samuel Moore | Emma Sarles | Amy HughesHannah Folby | Elizabeth Nicolas | Robert Henry

Upper Extremity Team

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

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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

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

Bill of Materials | Catch&Launch

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Poly twine net PVC pipe for testing

Rendering | Catch&Launch

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Lever Attachment

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Design Details

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!!"#$%

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

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

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

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)

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)

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

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)

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?