0 2 1 4 3 5 8 76 9 me 462 senior design project design of a moonbuggy for the nasa great moonbuggy...
TRANSCRIPT
02
1
435
8769
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
02
1
435
8769
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
02
1
435
8769
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.
02
1
435
8769
Critical Parameters
• Weight
• Overall Dimensional Requirements
• Time to Assemble
• Time to Finish Course
• Wheel Angle at Full Turn
• Cost
02
1
435
8769
Major Components for Design
• Frame• Suspension• Drive Train• Steering
02
1
435
8769
Project Realm• Brainstorming• Rough Sketches• AutoCad Sketches• Functional Decomposition• Concept Mapping• Decision Matrices• Concept Selection• Overall Moonbuggy Concept Selection• Overall Decision Matrix• Final Concept
02
1
435
8769
AutoCad Sketches•Suspension
02
1
435
8769
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
02
1
435
8769
Overall Concepts
02
1
435
8769
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
02
1
435
8769
Final Concept
02
1
435
8769
Frame•Triangular Cross- Section
•Fits in 4 ft. cube
02
1
435
8769
Suspension• Fully Independent
• Machined
02
1
435
8769
• Steering
• Drive Train
• Rack and Pinion
•Dual Belts
02
1
435
8769
Safety and Environmental Issues
• Safety– Seat belts– Pedal Toe Clips
• Environmental– 100% Recyclable/Reusable
02
1
435
8769
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
02
1
435
8769
Acknowledgements
• Faculty
– Dr. Ramana Pidaparti
– Dr. Jie Chen
• Corporate
– HEI
– Rolls Royce
02
1
435
8769
Questions