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DESIGN & PRODUCTION OF AN ALL – TERRAIN WHEELCHAIR. Andrew Baigrie Connor Henley Jeff Lance Miguel Tovar September 29th, 2005. Overview. Personnel Introductions Product Background Benchmarking Qualifying Design Specification Customer Attributes QFD Project schedule.

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Design production of an all terrain wheelchair l.jpg

DESIGN & PRODUCTION OF AN ALL – TERRAIN WHEELCHAIR

Andrew BaigrieConnor Henley Jeff LanceMiguel Tovar

September 29th, 2005


Overview l.jpg
Overview

  • Personnel Introductions

  • Product Background

  • Benchmarking

  • Qualifying Design Specification

  • Customer Attributes

  • QFD

  • Project schedule


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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


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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


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Benchmarking

  • Competitive

    • Quickie XTR

Lateral

  • Four-wheelers


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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.


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Primary

Secondary

Tertiary

Front and Back

Suspension

5th Wheel

Rotate like Castor

Off Road Capabilities

5th Wheel

Larger, not castor size

Castor Style 5th Wheel Turning

Maneuverability

Easily traverse bumps/uneven terrain

Easy to move forward/backward

Customer Attributes


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QFD

Highest Ratio of Improvement

5th Wheel Modifications

General suspension

Recumbent Seat


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Project Schedule

  • Major Milestones

    • Prototype Due: Nov. 23

    • Build Time: 3+ weeks

    • Design Freeze: Oct. 21

      • Analysis Complete: Oct. 21

      • Preliminary Design: Oct. 14


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Aggressive Design


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