DESIGN

1
DESIGN PRODUCTION OF AN ALL TERRAIN
WHEELCHAIR

• Andrew BaigrieConnor Henley Jeff LanceMiguel
  Tovar
• September 29th, 2005

2
Overview

• Personnel Introductions
• Product Background
• Benchmarking
• Qualifying Design Specification
• Customer Attributes
• QFD
• Project schedule

3
Team Introductions

• Connor Henley
• Hometown Casper, WY
• Role Team Liaison
• Team Editor
• Builder/Test Engineer

• Andrew Baigrie
• Hometown Plymouth, MI
• Role Finance Director
• Builder/Test Engineer

• Jeff Lance
• Hometown Birmingham, MI
• Role Design Engineer
• Builder/Test Engineer
• Team Secretary

• Miguel Tovar
• Hometown Brighton, MI
• Role Design Engineer
• Builder/Test Engineer

4
Product Background

• Product Complaints
• Difficult to navigate over branches, mud, and
  general obstacles encountered on an off-road
  trail.
• Current 5th wheel has poor mobility
• Excessive ride harshness when off-road
• Wheels difficult to maintain and use when dirty
• Difficult to climb hills in a forward position

Modified Invacare A-4
5
Benchmarking

• Competitive
• Quickie XTR

• Lateral
• Four-wheelers

6
Quantifying Design Specifications

• Benchmarking Results
• Force Required to Move Chair 12 lbs
• Weight 35 lbs
• Wheel Base 38 in.
• Wheel Track 18 in.
• Mountain Bike Suspension Travel 2 in.

7
Customer Attributes
8
QFD

• Highest Ratio of Improvement
• 5th Wheel Modifications
• General suspension
• Recumbent Seat

9
Project Schedule

• Major Milestones
• Prototype Due Nov. 23
• Build Time 3 weeks
• Design Freeze Oct. 21
• Analysis Complete Oct. 21
• Preliminary Design Oct. 14

10
Aggressive Design

• Questions?
• Contact us aggressivedesign_at_umich.edu