DESIGN & PRODUCTION OF AN ALL – TERRAIN WHEELCHAIR

Andrew BaigrieConnor Henley Jeff LanceMiguel Tovar

September 29th, 2005

Overview

Personnel Introductions

Product Background

Benchmarking

Qualifying Design Specification

Customer Attributes

QFD

Project schedule

Team Introductions

Andrew Baigrie Hometown: Plymouth, MI Role: Finance Director

- Builder/Test Engineer

Jeff Lance Hometown: Birmingham, MI Role: Design Engineer

- Builder/Test Engineer

- Team Secretary

Connor Henley Hometown: Casper, WY Role: Team Liaison

- Team Editor

- Builder/Test Engineer

Miguel Tovar Hometown: Brighton, MI Role: Design Engineer

- Builder/Test Engineer

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

Benchmarking

Competitive Quickie XTR

Lateral Four-wheelers

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.

Customer Attributes

Front and Back

5th Wheel

Rotate like Castor

Larger, not castor size

Castor Style 5th Wheel TurningEasily traverse bumps/uneven terrain

Suspension

5th Wheel

Maneuverability

Off Road Capabilities

Primary Secondary Tertiary

Easy to move forward/backward

QFD

Highest Ratio of Improvement

5th Wheel Modifications

General suspension

Recumbent Seat

Project Schedule

Major Milestones Prototype Due: Nov. 23 Build Time: 3+ weeks Design Freeze: Oct. 21

- Analysis Complete: Oct. 21

- Preliminary Design: Oct. 14

Aggressive Design

Questions?

Contact us: aggressivedesign@umich.edu