team 2 presentation
TRANSCRIPT
College of Southern Maryland
EGR 1100 – Introduction to Engineering
Professor Fawaz Roumani, Ph.D. & Professor Gobi Gopinath
Spring 2015
April 29th, 2015
TEAM 2
GEORGE JENKINS – PROJECT MANAGERPATRICK SMITH, DEONTE HICKS, TREVIN REAVES
MICROCONTROLLER - BASED ROBOTIC CAR
DESIGN PROCESS:DEFINING THE PROBLEM
PROJECT OVERVIEWThe purpose is to design, build, and test a mechanically/electrically driven robotic car, controlled by a microcontroller, which can autonomously navigate a black-line track to the end of a course.
• Must be self contained and portable.
• Safe to operate.
• Power source should be batteries.
• Weigh under 6 pounds.
• Area under 100 in2
• Volume under 600 in3
• Build a quality design that looks professional.
• Follow a 1 inch wide black line for approximately 15 feet.
• Complete the course in under 1 minute.
• Utilize the Arduino-UNO microcontroller.
• Maneuver turns and straight paths.
• Stay within the 6 inch borders of the track.
• Develop a control logic to steer the car.
• Program the microcontroller to control the car.
DESIGN CRITERIA
DESIGN PROCESS:BRAINSTORMING IDEAS
BRAINSTORMING IDEAS
BRAINSTORMING IDEAS
TWO PRELIMINARY DESIGNS4 Motor Design 2 Motor Design
4 MOTOR DESIGN ANALYSIS
Pros:- High speed capability- Efficient- Assessable materialsCons:- Cost- Feasibly- Complexity of program
2 MOTOR DESIGN ANALYSIS
Pros:- Cost- Simplicity- Complexity of programCons:- Less speed capabilities- Efficiency of a pivot wheel
THE INITIAL DESIGN
2 Motor Design
DESIGN PROCESS:DESIGN BUILD AND
EVOLUTION
DESIGN EVOLUTION
• Changed chassis design.
• Changed DC to Continuous Servo Motors.
• 2 brackets to secure motors instead of 1.
• Added wood block to pivot wheel.
• Moved pivot wheel to the back.
• Removed motor shield.
• Added breadboard to design.
• Increased distance between sensors.
THE CAR
AUTOCAD DESIGN
COST ANALYSISPart Retail Price Quantity Used Total Cost Team Cost Source
Chassis $2.50 1 $2.50 $0.00 CSMArduino UNO $6.25 1 $6.25 $0.00 CSMBreadboard $3.59 1 $3.59 $0.00 CSM
Optical Sensor $13.33 2 $26.66 $0.00 CSMContinuous Servo Motor $8.59 2 $17.18 $0.00 CSM
Breadboard Cables $0.06 12 $0.72 $0.00 CSMWheel $1.25 2 $2.50 $0.00 George
Mounting Bracket $0.30 4 $1.20 $0.00 DeontePivot Wheel $1.25 1 $1.25 $1.25 Amazon.com
Fasteners $0.24 12 $2.88 $0.00 Deonte9 Volt Battery $3.49 1 $3.49 $3.49 Walmart.com
9 Volt Battery Adapter $0.60 1 $0.60 $0.00 CSMWood Block $1.89 (1/4) $0.47 $0.00 George
$69.29$4.74
Bill of Materials
Total CostTotal Cost to Team
CIRCUIT DESIGN
THE PROGRAM
DESIGN PROCESS:TESTING AND EVALUATION
TEST RESULTSTrial Time (Seconds)
1 Fail2 Fail3 44.744 43.895 Fail6 Fail7 46.518 45.549 46.02
10 46.4811 45.8912 45.6313 46.3814 46.4615 46.52
Average 45.82
Testing Results
DESIGN EVALUATION• The car was able to stay within the borders of the
track and fully completed the track under a minute.
• The car utilizes Arduino, is safe to operate, and portable.
• The car meets all size requirements by having:- Area of 44 in2 (5.5 in x 8 in)- Volume of 132in3 ( 5.5 in x 8 in x 3 in)- Weight of 1.4 lbs.
• Design meets all the given criteria.
CAR DEMONSTRATION