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