VERTIGO2 Preliminary Design Presentation
October 27, 2004
Team Members
ECE Team
Mimi Phan (ECE Team Leader)
Kevin Boyce
Jeff Laub
Tebo Leburu
Prateek Mohan
Ryan Strauss
Duroseme Taylor
Calvin Turzillo
AE Team
Nikhil Nair
Luke Alexander (Project Leader)
CS Team
Chris Fernando
Team Organization
VERTIGO² Project
Manager
Luke Alexander
ECE Coordinator
Mimi Phan
Circuitry Group
Kevin Boyce
Tebo Leburu
Prateek Mohan
Calvin Turzillo
Communications Group
Calvin Turzillo
Jeff Laub
Programming Group
Chris Fernando
Prateek Mohan
Mimi Phan
Ryan Strauss
Duro Taylor
Web Group
Prateek Mohan
Ryan Strauss
Introduction
VERTIGO—Versatile
Exploratory
Robotic Tilt-rotor for Information
Gathering Operations—is a small
dual mode aircraft designed as a
VTOL aircraft with the ability to
transition to normal horizontal flight.
Many different projects have been
undertaken to challenge the idea of
a dual mode aircraft.
The advantages of utilizing both
flight modes in one aircraft can be
realized with a simple understanding
of helicopter aerodynamics—namely
the ratio of stability to altitude.
Project Background
Aircraft Geometry and Specifications
•
Previous Accomplishment



•
Geometric designs developed
Aerodynamic models developed
Completed VERTIGO prototype
airframe
Previous Design Problems




Time
Insufficient tilting design
Improper center of mass configuration
Too heavy
Tip-to-tail length:
Fuselage length:
Boom length:
Wingspan:
Fuselage max width:
Tail width:
Dihedral:
degrees
Airfoil section:
7’2”
2’10”
3’11”
6’
6”
3’1”
5
NACA 0012
Objectives
Primary Objectives
•
•
•
•
•
Design and integrate a proper electrical system to ensure functionality
Design a simple, sufficient tilting mechanism for the rotor assemblies
Perform laboratory testing to verify aerodynamics and functionality
Achieve vertical flight and vertical maneuverability
Land
Secondary Objectives
•
•
•
Transition to horizontal flight via tilting mechanism
Return to vertical flight
Land without catastrophe
Concept
Vertigo concept art by Luke Alexander
Design Option 1
Microchip selection
PIC 16F Family
uses only 35 RISC instructions
The 16F PIC only has 2 PWMs
Maximum frequency of 20 MHz
PIC 18F Family
PICBasic, second party software in C or Java
Maximum frequency of 40 MHz
consume less power
serial and I²C communication
8 PWMs built on
More memory
1 vs 2 Microchips
less power consumption
weight reduction
PICs communicate with one another
simpler programming
Design Option 2
Flight control input device (RC controller vs. Laptop
control)
RC Controller
Pros.
Ease of control for Pilot
Controller is available from previous year’s VERTIGO
Cons.
Controller needs to be re-programmed to interface with the onboard flight system
For the above, the controller would need to be pulled apart to
determine its capability.
Difficult to program
No visual feedback for control of craft
Limited time, Unlimited specs
Laptop & Joystick
Pros.
Better piloting interface
Joystick need not be programmed as code exists on the laptop
Laptop displays live video from the camera on-board the plane
making piloting the craft easy
Cons.
Pilot needs to be trained in joystick operation
Time-lag in communication between ground station and onboard system.
Design Option 3
Flight mode transition mechanism (Linear actuator vs. stepper motor)
Specifications Summary
Taking into consideration all 3 options mentioned previously
1
1
1
1
1
5
PIC 18F4431 microprocessor
433 MHz Serial Transmitter
433 MHz Serial Receiver
Wireless camera w/ receiver
Ground based controller
14.8V LiIon battery packs
Program code will be written in PICBasic Pro.
TTL logic design
9600 baud transfer rates across RS232 protocol
Project Budget
Item
Quantity
Price
Cost
Vendor
PIC Microcontrollers
5
$9.58
$47.90
Serial Receiver
1
$200.00
$200.00
Serial Transmitter
1
$200.00
$200.00
Joystick
2
$150.00
$300.00
Software
1
$100.00
$100.00
ECE Materials
1
$250.00
$250.00
AE/MAE Materials
1
$200.00
$200.00
Battery Charger
1
$119.00
$119.00
Servos
4
$40.00
$160.00
Towerhobbies.com
Geared Tilt Motor
1
$169.00
$169.00
Towerhobbies.com
Gyroscope
1
$350.00
$350.00
Motor Controls
2
$240.00
$480.00
Towerhobbies.com
15
$15.00
$225.00
Towerhobbies.com
Communications (misc)
1
$300.00
$300.00
Printed Circuit Boards (assembled)
2
$150.00
$300.00
Lithium Ion Batteries (per cell)
$
3400.90
Microchip
CompUSA or Best Buy
Total budgeted hours
Name
Hours Worked
Hours Budgeted
Percentage Worked
Mimi Phan
52.5
56
93.75%
Kevin Boyce
17.5
56
31.25%
Jeff Laub
8
56
14.3%
Tebo Leburu
19
56
33.93%
Prateek Mohan
27
56
39.58%
Ryan Strauss
17.75
56
31.70%
Duroseme Taylor
18
56
32.14%
Calvin Turzillo
25
56
44.64%
Total
184.25
448
40.16%
Questions?