Post on 20-Jan-2017
MIRE Design Review
Steven Wylie, Ivan Auer, and Max Tabor
February 11, 2013
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
Requirements
• Functional/Performance • Physical Size• Safety• Portability• Electrical/Software
Functional Decomposition
Key Technical Challenges
• Switch placement system• Arm sturdiness• Mobility and stability• Monitor support and display • Material choice
Design AlternativesThree Unit System
Design AlternativesOne Unit System
Design Alternatives
• Box Mover Design
Selection of Primary Design
Selection of Primary Design
Selection of Primary Design
Selection of Primary Design
Weight Score Multiplied Weight Score Multiplied Weight Score Multiplied Weight Score Multiplied80/20 3 0.75 4 0.8 5 1.5 4 1 4.05Eco Shape 2 0.5 4 0.8 4 1.2 3 0.75 3.25L 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 133992 0.15 2 Less Heavy 2 Heavy Machining 2 15000 213993 0.21 3 Light 3 Multiple Types of Premachine Material 3 23000 293994 0.26 4 Very Light 4 Fasterners and Raw Material Options 4 31000 389995 0.35 5 Lightest 5 Vast Amount of Interchangable Parts 5 39000 +
Table 7: Material Decision Matrix
1
Total WeightTotal ScoreItem Price Weight/ inch Ease of Use Strength
0.25 0.2 0.3 0.25
Subsystem Development
Moniter/Arm Mounting System
Subsystem Development
• Front Button Interface
Subsystem Development
Moniter/Arm Height Adjustment System
Engineering Analysis
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
Budget
X-Box Design
Device Name Amount Purchacing Location Price Per Part Total Price
Structure8020 - 1010 T-Slotted Profile 34 feet 8020.net $0.23 per inch $93.84
Arms Moffatt Arms 4 arms x 30" eachmoffattproducts.com $1.00 per inch $120.00
Monitor MountLX Wall Mount LCD Arm 1 ergotron.com
$169.00 per unit $169.00
Monitor Mount Locks
Single Flange Linear Bearing Brake 2 8020.net $38.60 per part $77.20
WheelsRWM Signature Solid Wheel 2 medcaster.com $30.00 per part $60.00
Total Cost: $520.04
Project Plan
• Order parts immediately if given approval• Begin early testing and fabrication once
parts arrive
Conclusion
• Primary design choice in summary
• Questions and comments from customers and advisors