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All-Terrain Wheelchair Design & Production Project Overview

This document provides an overview of the design and production process of an all-terrain wheelchair. It includes personnel introductions, product background, benchmarking information, design specifications, customer attributes, QFD analysis, and project schedule. The team consists of Connor Henley, Andrew Baigrie, Jeff Lance, and Miguel Tovar. The product background highlights current issues with off-road mobility and outlines the required modifications. The benchmarking results and quantifying design specifications help in setting clear targets. The customer attributes and QFD analysis prioritize improvements for the 5th wheel modifications, general suspension, and recumbent seat design. The project schedule details major milestones and deadlines. For any inquiries, contact aggressivedesign@umich.edu.

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All-Terrain Wheelchair Design & Production Project Overview

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  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. 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

  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@umich.edu

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