1. P17082 Biomechanical Elbow Model Build and Test Review
Maria Romero-Creel, Shannon Keenan, Chris Harley, Amanda Cook

2. Agenda New Issues / Problem Review / Design Updates
Accomplishments since last review
Parts Status
BOM
Build Status
Testing Status and Results
Action Items
Schedule Review
Miscellaneous Deliverables

3. Overview
Team Vision
The goal for this project phase was to complete a model to prototype and begin the process of testing & evaluating the model and building process. Additionally, to evaluate new problems and begin groundwork for miscellaneous deliverables.
Completed Goals:
Built a testable model.
Built stand / created a complete Solidworks model.
Created formal framework for testing.
Updated documentation methods for problem and testing tracking.
Abstracts were started for competitions and final paper.
Pending Goals:
Begin testing of model.

4. Action Completion from Build and Test Prep Review
Action Item from last review
Finish printing set of bones: 100%
Assemble prototype w/ subsystems: 100%
Document truss construction: 80%
Problem tracking: 100%
Manual edits to bones: 100%
Simple truss model: 100%
Integrated systems model: 100%
Preliminary paper outline: 90%
Imagine RIT proposal draft : 100%
Force & torque analysis: 0%
Formalize test plans: 100%
Individual Contributions:
Finish printing set of bones: All
Assemble prototype w/ subsystems: All
Document truss construction: Maria & Amanda
Problem tracking: Shannon
Manual edits to bones: Amanda
Simple truss model: Chris
Integrated systems model: Chris
Preliminary paper outline: Amanda
Imagine RIT proposal draft for submission: Amanda
Update Test Plans: Maria
Planning & Communication: Maria

5. New Issues Model Count Update
Due to time required for proper testing we are not confident on our ability to finalize 12 working models. Our goal will be to finalize 6 working models by the end of the semester.
3D Printing - 3-D printing failure or mirroring during print (fixed)

6. Design Updates
New truss / complete model Solidworks designs:

7. Design Updates
New truss / complete model Solidworks drawings:

8. Design Updates

9. Parts Status and BOM Parts Status:
All parts ordered from McMaster Carr were received timely with no issues.
Bones were 3D printed in a timely manner with no new concerns.

10. Test Plans – Engineering Requirements Overview

11. Test Plans ER1,2,3 – Static Force of Muscle A, B, and C.
Test - Attach load cell to break in muscle string, hang 250g mass from hand hook, wait for arm to lower under the weight and settle, then get read out from Capstone.
Validity- Force achieved at rest must match accepted anatomical value.
ER4 – Angles at each position
Test - With each muscle attached and load cells strung, and the goniometer attached and reading out to Capstone, the arm is bent at the elbow and moved through the available range of motion.
Validity- readout must show that the arm can move from approximately 0o and 180o.
  ER5 – Max Load
Test -Hang a load of 500g from the hand hook while holding the lower arm up to the upper arm so that the angle of the elbow is approximately 0­o. release the lower arm and allow the weight and lower arm to fall.
Validity- The arm must be able to fall and stop while still holding the weight, staying upright and stable and produce steady force and angle change graphs / tables through Capstone. There should be no bending or material failure in a valid case, and the entire base must still be resting on the tabletop.

12. Test Plans ER6- Muscle Attachment Position
Test - With load cells in place, no weights, and the lower arm resting so that the angle of the elbow is approximately 90o, measure the angles of the muscles with the bones and the distance of the muscle attachment to the bones.
Validity – Both values must be within ±5%of the average adult.
ER7,8 – Deviation and Possible Positions
Test - Set the model in each possible position with the 250g weight. For each position (supinated wrist, pronated wrist, flexed elbow), allow the device to sit, with no contact or extra support from an outside object for 1 minute, measure deviation.
Validity – The position set by the user must not deviate by more than ±1cm during the wait period.
ER9- Time Required for Assembly
Test - Begin with an unassembled device. Start a timer and begin assembly, including the addition of base structure strings, load cells, goniometer, and arm straps. Include all hardware cables necessary for data acquisition (load cells, goniometer).
Validity – The full assembly takes approximately 20 minutes or less to assemble and can support a 250g weight from the hand hook upon completion.

13. Problem Tracking

14. Action Completion Review
Action Item from last review
Finish printing set of bones: 100%
Assemble prototype w/ subsystems: 100%
Document truss construction: 80%
Problem tracking: 100%
Manual edits to bones: 100%
Simple truss model: 100%
Integrated systems model: 100%
Preliminary paper outline: 90%
Imagine RIT proposal draft : 100%
Force & torque analysis: 0%
Formalize test plans: 100%
Individual Contributions:
Finish printing set of bones: All
Assemble prototype w/ subsystems: All
Document truss construction: Maria & Amanda
Problem tracking: Shannon
Manual edits to bones: Amanda
Simple truss model: Chris
Integrated systems model: Chris
Preliminary paper outline: Shannon
Imagine RIT proposal draft for submission: Shannon
Update Test Plans: Maria
Planning & Communication: Maria

15. Action Items Action Items Moving Forward Test Model
Force and torque analysis of model
Update bone models
Reprint current model with new updates
Finish manual for truss structure
Test data acquisition
Define critical dimensions for future models
Continue printing bones for production scale
Hand mount

16. Plans & Schedule - Summary
Finalize prototype
Complete testing
Scale up production to meet 6 model goal
Prepare manual for customer handoff
Miscellaneous Deliverables Imagine RIT – Submit to MSD > Submit to RIT Imagine Design Competition submissions

17. Plans & Schedule

18. Miscellaneous Deliverables
Summary:
American Society of Biomechanics Paper – Written, not submitted.
RIT Imagine – Poster – Written not submitted.
Interdisciplinary Academic Research – No progress so far.

19. Individual Three Week Plan
Amanda:
Actively participate in the testing of the completed model (12 hours, ongoing)
Consult with RIT athletic trainers to ensure the model behavior is anatomically accurate (ongoing)
Update the bill of materials, as necessary (1 hour, ongoing)
Keep track of conferences and submittal dates (1 hour, ongoing)
Review the abstracts and make edits before the final submissions are due (ongoing)
Shannon:
Model testing & analysis
Updating problem tracking & solution results
Assist with construction & printing of more models
Manage timeline on upcoming decisions& action items

20. Individual Three Week Plan
Chris:
Help test the first model that was completed.
Address any design changes that may need to be made and update all cad drawings to reflect those changes
Work on building the first 100% fully production model.
Test and validate the first “production model”
Maria:
Help test the model and assure customer requirements are being met.
Review abstracts and paper submissions / application process for competitions.
Update / keep track of test plans file.
Formalize truss instructions.
Work with customer to make sure customer requirements are being met.

21. Questions or Suggestions?

22. Material Information String Information from PASCO
This phase ends with the deadline for the 12 model goal decision. Due to the time that design and testing has taken, the team decided that the goal to pursue 12 completed and tested models is unwise, and will be planning to complete 6 final models by the end of the term. This goal will be reevaluated at the end of the next phase.