1. MIRE Design Review
Steven Wylie, Ivan Auer, and Max Tabor
February 11, 2013

2. Scope
• Presentation of proof of concept
• Requirements and functional decomposition
review
• Design alternatives
• Primary design choice
• Engineering evidence to meet requirements
• Subsystems should address key technical
issues

3. Requirements
• Functional/Performance
• Physical Size
• Safety
• Portability
• Electrical/Software

4. Functional Decomposition

5. Key Technical Challenges
• Switch placement system
• Arm sturdiness
• Mobility and stability
• Monitor support and display
• Material choice

6. Design Alternatives
Three Unit System

7. Design Alternatives
One Unit System

8. Design Alternatives
• Box Mover Design

9. Selection of Primary Design

10. Selection of Primary Design

11. Selection of Primary Design

12. Selection of Primary Design
Table 7: Material Decision Matrix
Price Weight/inch Ease of Use Strength
Item Total Weight Total Score
Weight Score Multiplied Weight Score Multiplied Weight Score Multiplied Weight Score Multiplied
80/20 3 0.75 4 0.8 5 1.5 4 1 4.05
Eco Shape 0.25 2 0.5 0.2 4 0.8 0.3 4 1.2 0.25 3 0.75 1 3.25
L Bar Aluminum 1 0.25 5 1 2 0.6 2 0.5 2.35
Price $ Weight EofU Strength (Yield Strength)
1 0.10 1 Heavy 1 Custom 1 7000 13399
2 0.15 2 Less Heavy 2 Heavy Machining 2 15000 21399
3 0.21 3 Light 3 Multiple Types of Premachine Material 3 23000 29399
4 0.26 4 Very Light 4 Fasterners and Raw Material Options 4 31000 38999
5 0.35 5 Lightest 5 Vast Amount of Interchangable Parts 5 39000 +

13. Subsystem Development
Moniter/Arm Mounting System

14. Subsystem Development
• Front Button Interface

15. Subsystem Development
Moniter/Arm Height Adjustment System

16. Engineering Analysis

17. Engineering Analysis
• Moment analysis to prevent tipping
• Weight and cost analysis of 80/20 using
material properties
• Wheel size analysis for bumps in hospital
• Weight analysis
• Is it light enough to be easily moved?
• Comparative analysis of given specification
sheets of materials to design requirements

18. Budget
X-Box Design
Device Name Amount Purchacing Location Price Per Part Total Price
8020 - 1010 T-Slotted
Structure Profile 34 feet 8020.net $0.23 per inch $93.84
moffattproducts.co
Arms Moffatt Arms 4 arms x 30" each m $1.00 per inch $120.00
LX Wall Mount LCD $169.00 per
Monitor Mount Arm 1 ergotron.com unit $169.00
Monitor Mount Single Flange Linear
Locks Bearing Brake 2 8020.net $38.60 per part $77.20
RWM Signature Solid
Wheels Wheel 2 medcaster.com $30.00 per part $60.00
Total Cost: $520.04

19. Project Plan
• Order parts immediately if given approval
• Begin early testing and fabrication once
parts arrive

20. Conclusion
• Primary design
choice in summary
• Questions and
comments from
customers and
advisors