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ME 462 Senior Design Project

Design of a moonbuggy for the NASA Great Moonbuggy Race

Faculty Advisor: Dr. Ramana Pidaparti

Marques FranklinClint GarrettKerry O’DonnellNatalie RidaoSara Stirn

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Background•12th Annual Moonbuggy Competition

•Huntsville, Alabama – NASA Space Center

•7th year IUPUI has competed

•Timed event:

•Assembly time

•Track time

•Penalties

•Fastest time wins

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Objective

• The Great Moonbuggy Race requires students to design a vehicle that addresses a series of engineering problems that are similar to problems faced by the original moonbuggy team.

• The main objectives of the competition are to design, build, and race a human-powered vehicle able to conquer typical obstacles that a moon rover might encounter.

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Critical Parameters

• Weight

• Overall Dimensional Requirements

• Time to Assemble

• Time to Finish Course

• Wheel Angle at Full Turn

• Cost

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Major Components for Design

• Frame• Suspension• Drive Train• Steering

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Project Realm• Brainstorming• Rough Sketches• AutoCad Sketches• Functional Decomposition• Concept Mapping• Decision Matrices• Concept Selection• Overall Moonbuggy Concept Selection• Overall Decision Matrix• Final Concept

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AutoCad Sketches•Suspension

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Decision MatrixCriteria Weight Rigid Mount Solid Axle

Fully Independent - Machined

         

Durable 9 - + DATUM

Cost 5 + S  

Easily Maintained 7 - S  

Absorption Capabilities 10 - +  

Low Weight 6 + -  

Traction 10 - -  

Efficiency 8 - -  

Total +   2 2 0

Total -   5 3 0

Overall Total   -3 -1 0

Weighted Total   -33 -25 0

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Overall Concepts

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Overall Decision MatrixCriteria Weight Trapezoidal (1) Trapezoidal (2) Triangular (1) Triangular (2)

Un-Assembled dimensions 10 S S S

DATUM

Weight 8 + + S

Assembled dimensions 4 S S S

Height of riders off the ground 10 S S S

Turning radius 8 - S S

Cost 7 - - S

Ease of manufacturing 8 - - +

Ease of operation 9 - - +

Assembly time 10 + + +

Steps to assemble 8 + + +

Braking time 5 S S S

Average speed 8 - - S

Total +

 

3 3 4 0

Total - 5 4 0 0

Overall Total -2 -1 4 0

Weighted Total -14 -6 35 0

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Final Concept

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Frame•Triangular Cross- Section

•Fits in 4 ft. cube

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Suspension• Fully Independent

• Machined

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• Steering

• Drive Train

• Rack and Pinion

•Dual Belts

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Safety and Environmental Issues

• Safety– Seat belts– Pedal Toe Clips

• Environmental– 100% Recyclable/Reusable

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Summary

• Weight – Less than 125 pounds

• Overall Dimensional Requirements – Fits in 4ft. Cube

• Time to Assemble – 0:10

• Time to Finish Course – 3:30

• Wheel Angle at Full Turn – 30 degrees

• Cost - $4500

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Acknowledgements

• Faculty

– Dr. Ramana Pidaparti

– Dr. Jie Chen

• Corporate

– HEI

– Rolls Royce

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Questions