ME 462 Senior Design Project Design of a moonbuggy for the NASA Great Moonbuggy Race Faculty Advisor: Dr. Ramana Pidaparti Marques Franklin Clint Garrett Kerry O’Donnell Natalie Ridao Sara Stirn

Background 12 th Annual Moonbuggy Competition Huntsville, Alabama – NASA Space Center 7 th year IUPUI has competed Timed event: Assembly time Track time Penalties Fastest time wins

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.

Critical Parameters Weight Overall Dimensional Requirements Time to Assemble Time to Finish Course Wheel Angle at Full Turn Cost We ight (lb) Ste ps to As se mbl e (#) Ti me to As se mbl e (s) Ti me to Fini sh Co urs e (mi n) Co st ($) Ti me to Bui ld (da ys) Av era ge Sp ee d (m ph) Wh eel An gle at Full tur n ( °) Su spe nsi on Da mpi ng Rat io Ti me to bra ke (s)

Major Components for Design Frame Suspension Drive Train Steering

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

AutoCad Sketches Suspension

Decision Matrix CriteriaWeightRigid MountSolid Axle Fully Independent - Machined Durable9-+ DATUM Cost5+S Easily Maintained7-S Absorption Capabilities10-+ Low Weight6+- Traction10-- Efficiency8-- Total Total Overall Total -30 Weighted Total

Overall Concepts

Overall Decision Matrix CriteriaWeightTrapezoidal (1)Trapezoidal (2)Triangular (1)Triangular (2) Un-Assembled dimensions 10SSS DATUM Weight 8++S Assembled dimensions 4SSS Height of riders off the ground 10SSS Turning radius 8-SS Cost 7--S Ease of manufacturing 8--+ Ease of operation 9--+ Assembly time Steps to assemble 8+++ Braking time 5SSS Average speed 8--S Total Total Overall Total-240 Weighted Total

Final Concept

Frame Triangular Cross- Section Fits in 4 ft. cube

Suspension Fully Independent Machined

Steering Drive Train Rack and Pinion Dual Belts

Safety and Environmental Issues Safety –Seat belts –Pedal Toe Clips Environmental –100% Recyclable/Reusable

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

Acknowledgements Faculty –Dr. Ramana Pidaparti –Dr. Jie Chen Corporate –HEI –Rolls Royce

Questions