2017 baja sae competition - university of...
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2017 Baja SAE Competition
Meet the Team
Enrique DeLeon Manjula Hodekar Keith Hernandez
Mechanical LeadPublic Relations
Design LeadLogistics
Team LeadProject Management
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Instructor:Dr. Raresh PascaliUH Professor
Alumni Advisor:Sean VanVactorUH MET Graduate
Undergraduate Colleague:Joshua ContrerasUH Industrial Design
Faculty Advisor:Marcus GaminoUH Instructor
Objective
Deliverables
History & Events
Major Components
Project Management
Comments & Questions
Outline
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To design and build a vehicle that meets the rules and regulations of the 2017 Baja SAE competition and participate in the competition that will take place in Pittsburg, Kansas on May 25-28, 2017
Objective
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• Register for the 2017 Baja Competition in Pittsburg, Kansas by the November 14, 2016 deadline
• Have a Baja vehicle that is mechanically complete with a functioning suspension assembled by December 2016
• Manufacture carbon fiber uprights for the suspension
• Achieve a vehicle weight under 400 lbs.
• Pass the Baja SAE inspection for the competition
• Achieve a top speed of 30 mph on a flat surface
• Design a vehicle that can achieve a flat jump of 7 ft.
• Implement instrumentation that is capable of data acquisition
Deliverables
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• Baja SAE History
• Originated – 1973
• Two seats vehicle
• First competition – 1976
• University of South Carolina
• Under the direction of Dr. John F. Stevens
• Number of teams in first competition – 10
• Total competitions – 7
• East, Midwest , and West – North America
• Brazil, Korea, South America, and Mexico- International
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History
http://students.sae.org/cds/bajasae/history.pdf
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Dynamic 700 Points
Acceleration 75
Land Maneuverability 75
Hill Climb/Rock Climb 75
Suspension & Traction 75
Endurance Race 400
Static 300 Points
Design 150
Cost 100
Presentation 50
https://www.facebook.com/michiganbajaracing/photos
https://www.facebook.com/Michiganbajaracing/photos
Main Events Scoring
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2016 2015 2014
University Univ. of Michigan Cornell University Cornell University
Team Michigan Baja Racing Big Red Racing Big Red Racing
Dynamic 696.40/700 683.35/700 672.87/700
Static 311.03/300 293.70/300 257.16/300
Overall score 1007.43/1000 977.05/1000 930.03/1000
Teams with high scores
• Continuous vehicle improvement from previous competition
• University/college funded vehicle
• Vehicle weight – less than 400 lbs.
• Maximum points in static event
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Winning Strategy
• Continuous vehicle improvement from previous competition
• University/college funded vehicle
• Vehicle weight – less than 400 lbs.
• Maximum points in static event
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Frame - Design
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Function
• Series of tubes connected together to form a coherent structure
• Provides a rigid connection between the front and rear suspension
• Creates structural support for other necessary systems
• Provides protection for the driver
Frame - Design
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• In order to meet our deliverable by December 2016 we will use the frame that was designed and fabricated by the Baja Brigade senior design team
• The team will reconsider the material and design in the second semester and modify it accordingly
• Advantages of spaceframe design
• Inherent structural properties
• Easier to fabricate
• Easier to modify
Frame - Fabrication
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• Original frame was only tack welded
• Completed welding on frame members
• Arc Welder - E6013 Welding Electrodes
• Prepared frame to apply primer paint coat
Frame – Possible Material Reselection
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http://www.clienttest.spryox.com/quality_forge/imag
es/steel_images2.jpg http://p.globalsources.com/IMAGES/PDT/B1135131129
/Seamless-mechanical-tubing.jpg
http://www.aedmotorsport.com/images/uploads/products/
aluminum-tubes.jpg
MaterialDensity
(lbs./in3)Tensile Strength
(psi)Modulus of Elasticity
(ksi)Workability
(1 low-10 high)
AISI 1018 Steel 0.284 63,800 29,000 7
AISI 4130 Chromoly 0.283 97,200 29,700 7
6061 Aluminum 0.0975 45,000 10,000 4
Frame – Design Requirements
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• Load Restrictions
• Weight: Minimum requirement to carry a driver weighing 250 lbs.
• Height: Minimum requirement to fit a driver that is 75 in. tall
• Vehicle Dimension Restrictions
• Width: Max of 64 in. at the widest point
• Length: Max of 108 in.
Suspension - Basics
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• Camber
The angle of the wheel relative to the road
• Caster
The angular displacement of the steering axis from the vertical axis of the wheel
• Toe
The symmetric angle that a wheel makes with the longitudinal axis of the vehicle
Suspension - Linkage
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• Double Wishbone
• Equal A-arm Setup
• Unequal A-arm Setup
• Multilink
• Trailing Arm
Transmission
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• Automatic Transmission (CVT)
• Good for acceleration
• Fit for all terrains
• More complex and heavier
• More challenging to tune
• Manual Transmission
• Lightweight
• Cheaper than a CVT transmission
• Torque and speed are restricted on gear shifting
ATVRiders.com
Engine
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• All teams in the competition have to use the same engine
• Briggs & Stratton Model 19
• Horsepower: 10 HP
• Engine displacement: 305 cc
• Bore: 3.12 in
• Stroke: 2.438 in
• Compression ratio: 8.0 to 1
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The highest costs for the entire project
includes the suspension, registration fees
and the travel expenses for the 2017 Baja
SAE competition in Kansas
Component: Cost:
Chassis $1,000
Suspension* $2,000
Steering $650
Engine $250
Drivetrain $1,000
Brakes $400
Tires and rims $900
Seat $60
Safety equipment $300
Instrumentation/electrical $350
Registration fees* $1,250
Travel & lodging* $1,500
Total: $9,660
Contingency 20%: $1,932
Total with contingency: $11,592
BudgetMitigation:
• Suspension - Use available donated parts
• Registration Fees – Make fundraising a
weekly focus throughout the semester
• Travel & Lodging - Use our own
vehicle/trailer to reduce the cost of travel
and check routinely for deals on lodging
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Timeline
Completed
In progress
Not started
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Baja Vehicle
Research
Rules/safety
requirements
Major
components
Materials
Cost analysis
Design 1
Chassis design
Suspension
design
Design analysis
Fabrication 1
Frame
fabrication
Suspension
fabrication
Design 2
Braking
Steering
Powertrain
Instrumentation
Fabrication 2
Braking
Steering
Powertrain
Instrumentation
Testing
Mechanical
Electrical
Instrumentation
Completed
In progress
Not started
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Risk Matrix
5
4 3
1 2 3 4 5
1
2
Severity
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5P
rob
abili
ty
Mitigation
1 Funding Continue talking to potential sponsors and use donated parts
2 Manufacturing Recruit industry help
3 Fabrication Recruit experienced welder
4 Time Management Hold weekly meetings and track time sheets
5 Meeting SAE requirements Consult with previous teams and review rulebook
Risk
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Two Content Layout with Table
Class Group A Group B
Class 1 82 85
Class 2 76 88
Class 3 84 90
• First bullet point here
• Second bullet point here
• Third bullet point here
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Two Content Layout with SmartArt
• First bullet point here
• Second bullet point here
• Third bullet point here
Group A
Task 1
Task 2
Group B
Task 1
Task 2
Group C
Task 1
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Suspension - Uprights
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• Critical to locating different suspension geometries including the outer most control arm points as well as the tie rod connections
• The location of these points relative to the mounting locations on the chassis determines caster, camber, toe, and Ackerman
• Lightweight & strong
• FEA Analysis
• CNC Machining
• Manufacturing & Fabrication
SAE Competition Documents
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• Frame documents
• Pre-check documentation including material test reports
• Frame and weld specifications
• Cost report
• Cost calculations
• Cost supporting documents
• Design documents
• Design drawings
• Design specifications
Body Material
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• UHMW
• 200% elongation
• Easy fabrication
• Cost saving
• Available in verity of shapes and sizes
• Light weight